The conclusion that can be drawn by observing the cross between plants with purple flowers, long pollen grain plants and plants with white flowers, round pollen grains is that: (D) The traits are probably linked.
Cross is the breeding between two organisms that may or may not be of the same species. This results in an offspring that possesses the traits from both the parents. The offspring may show traits similar to one or both the parents or their traits may be completely different.
Linkage is the phenomenon where the two genes are placed closely together in a chromosome such that their segregation usually happens along with each other. If the offspring produced by a cross yields are more similar to their parents then their genes can be said to be linked.
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FILL IN THE BLANK. an onion is an example of a _____, an underground stem surrounded by leaves also modified for storage. question 10 options: tuber rhizome cladophyll bulb
An example of a bulb is an onion, which is a modified underground stem surrounded by leaves for storage.
A type of modified stem is a bulb. These short, mostly fleshy, leaf-like stems serve as food storage by being made of stems.
An underground stem known as a bulb contains roots on the lower side of the fleshy leaf that develops into a new plant. Example: Lily and the onion (Allium cepa) (Lilium bulbifera).
Like in ginger and turmeric, rhizomes are modified stems that grow horizontally at a specific depth and can store food.
As in colocasia and saffron, a corm is an underground adaptation of a stem made for storage.
A modified stem known as a tuber swells up from the buildup of starch and protein, much like a potato.
So "Bulb" is the appropriate response.
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All viruses are composed of a ____ made of ____ which surrounds the inner core containing ____ or RNA. Some viruses may also posses an external membranous covering that comes from the ___ ___. These viruses are know as ____, whereas viruses without this outer covering are called ____ viruses.
All viruses are composed of a capsid, made of proteins, which surrounds the inner core containing DNA, Some viruses may also posses an external membranous host cell, These viruses are enveloped viruses, this outer covering are called .non-enveloped viruses.
Capsid: This is a protein shell that surrounds and protects the genetic material of the virus. It is made up of many protein subunits called capsomeres.
Proteins: The capsid itself is made up of proteins, but there are also many other viral proteins that are involved in various stages of the viral life cycle, including entry into host cells, replication, and assembly of new viruses.
DNA or RNA: The genetic material of the virus can be either DNA or RNA, but not both. This genetic material contains all the information the virus needs to replicate and produce new viruses.
Host cell: Some viruses, such as the influenza virus, have an outer envelope that is derived from the host cell that they infect.
Enveloped viruses: These are viruses that possess an outer envelope derived from the host cell. Examples include the influenza virus, HIV, and herpes simplex virus.
Non-enveloped viruses: These are viruses that do not possess an outer envelope. Examples include the poliovirus, adenovirus, and norovirus.
Viruses are small infectious agents that consist of genetic material (DNA or RNA) surrounded by a protein coat called a capsid. Some viruses have an additional external layer called an envelope, which is made up of lipids and proteins and is derived from the host cell's membrane. Enveloped viruses are typically more susceptible to environmental factors such as heat, detergents, and disinfectants.
Non-enveloped viruses lack this outer layer and are generally more resistant to these factors. Understanding the structure of viruses is important for developing strategies to prevent or treat viral infections, as well as for developing vaccines that can trigger an immune response against specific viral proteins.
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the cytoskeleton of a eukaryotic cell plays a major role in organizing the structures and activities of the cell. the cytoskeleton consists of three main types of fibers: microfilaments, intermediate filaments, and microtubules. the three types of fiber differ in size, composition, and the functions they perform in the cell.1. In eukaryotic flagella, the fibers that slide past one another due to the activity of dynein proteins are _____2. Many cell organelles, most notably the nucleus, are anchored by which are assembled from a diverse class of proteins _____3. Centrosomes are sites where protein dimers assemble into _____4. The extension of pseudopodia in amoeba is due to the regulated assembly and destruction of _____5. The only cytoskeletal fibers not associated with intracellular movement or whole cell locomotion are the _____6. During muscle contractions, myosin motor proteins move across tracks of _____
Microtubules, intermediate filaments, 3. Microtubules, 4. Intermediate filaments, 5. Microfilaments 6. Microfilaments
What exactly is a cell?The smallest building block of all living things, including human tissues. The membrane protein, the nucleus, and indeed the cytoplasm are the three major components of a cell. The cell membrane encloses the cell and regulates the chemicals that enter and exit the cell.
What are cells, and what do they do?All living things are constructed mostly from cells. There are thousands of billion of cells throughout the human body. They give the body structure, absorb nutrients from meals, transform those calories into energy, and perform certain tasks.
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FILL IN THE BLANK. The basis of the buffering capacity of the respiratory system is based on the addition and/or removal of ________ to the body fluids which raises or lowers pH.
The basis for the respiratory system's ability to act as a buffer seems to be the intake and/or removal of CO2, which increases or lowers the PH of body fluids.
Which 4 body fluids are there?According to humoralism, a person's disposition was determined by their body's four fluids—blood, yellow bile, black bile, as well as phlegm—and that an imbalance caused certain illnesses depending on which characters in this story were in excess or deficiency. Blood, diarrhea, and other body substances such as vomit all contain pathogenic bacteria.
The three main body fluids are what?The three main bodily fluids in human body are bloodstream, tissue fluids, and lymph. They deliver nutrition and oxygen to numerous bodily areas and remove metabolic wastes that must be evacuated from the body.
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fill in the blank. pollen grains develop in the___of both gymnosperms and angiosperms. please choose the correct answer from the following choices, and then select the submit answer button. answer choices microphyll microsporangium micropyle megastrobilus megasporangium
Answer: microphyll
Explanation:
Which of the following is a plausible reason that explains why extreme halophiles can tolerate high salt conditions?
A. they can accumulate compatible solutes, such as glycerol and sucrose, in their cytoplasm
B. they can prevent the entrance of protons in their cytoplasm
C. they have less porins or transport proteins, which makes them less permeable to solutes
D. they have more saturated fatty acids in their membranes than unsaturated fatty acids
E. they have more unsaturated fatty acids in their membranes than saturated fatty acids
The correct answer is option E: Halophiles have more unsaturated fatty acids in their membranes than saturated fatty acids is a plausible reason that explains why extreme halophiles can tolerate high salt conditions.
Extreme halophiles can tolerate high salt conditions due to their membranes which contain more unsaturated fatty acids than saturated fatty acids.
Unsaturated fatty acids are more rigid, which allows them to resist the osmotic pressure that higher salt levels bring. Additionally, these unsaturated fatty acids reduce permeability, which allows the extreme halophiles to resist the entry of solutes into their cytoplasm.
The other options are not correct because they do not refer to the membrane composition of extreme halophiles.
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Imagine two genes, C and D, that are unlinked. A diploid individual with genotype CD/cd makes gametes with no errors in meiosis. What percent of that individual's gametes are expected to be CD?
O 25O 24O 22O 26
If genes are unlinked, all four test cross offspring types, also with a and b/b, might equal 25%. In this case, making a mistake by adding the total number of dominating creatures first from two groups and utilizing that data to get the result.
How can the quantity of eggs and sperm that a genotype produces be calculated?The method 2n, where n is the number of distinct variants represented in the genotype, can be used to determine how many eggs and sperm are generated by a particular genotype. One predominant genotype, Ab, and two discrete alleles, Bb and Cc, make up the polymorphism in this case.
What does it mean when it says "two genes are related" in relation to meiosis?Genes are referred to as related if they share a chromosome. Unless they are separated by crossing over, the alleles for these genes usually remain together throughout meiosis. During meiosis, sibling dna strands exchange genetic material in a process known as crossing over.
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cladistics help to organize organisms based on shared homologous characteristics. which of the following is considered false when looking at a cladogram? responses
A method other than infected persons from parent(s) to child for transferring genetic material by one species to another.
In biology, what exactly is a homologous?Possessing the same conventional arrangement and position. In biology, the term "homologous" can refer to two different anatomical features or behavioral characteristics that developed from a component or characteristic of their shared ancestor organism.
In anatomy, what does the term homologous mean?Identical anatomical traits in an organism's body parts, known as homologous structures, point to a shared evolutionary progenitor or developmental origin. Despite the fact that they could have a similar attribute, their functions are not always the same. Humans and bats both have homologous anatomy for their forelimbs, for instance.
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An anion is found in greater concentration inside the cell than outside. Which of the following statements BEST describes forces acting on the anion at the resting membrane potential (-70 mV)?
A) The chemical force is directed into the cell and the electrical force is directed out of the cell.
B) Both the chemical and electrical forces are directed out of the cell.
C) The chemical force is directed out of the cell and the electrical force is directed into the cell.
D) Both the chemical and electrical forces are directed into the cell.
E) There is insufficient information to answer this question.
The option that tells us of the force that is acting on the membrane potential is: Both the chemical and electrical forces are directed into the cell.
What is an anion?An anion is a negatively charged ion, which is formed when an atom gains one or more electrons. This results in an excess of negatively charged particles, giving the ion a net negative charge.
Anions are important in many chemical reactions and are commonly found in salts, acids, and other compounds. Examples of anions include chloride (Cl-), sulfate (SO42-), and nitrate (NO3-).
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In response to a muscle being stretched, a muscle spindle initiates a somatic spinal reflex that causes what?
Answer: Explanation:
A sudden stretch, such as tapping the Achilles' tendon, causes a reflex contraction in the muscle as the spindles sense the stretch and send an action potential to the motor neurons which then cause the muscle to contract; this particular reflex causes a contraction in the soleus-gastrocnemius group of muscles.
What structure in the small intestine increase the internal surface area? What advantage is gained by this increase in surface area?
The structure in the small intestine increase the internal surface area are the villi. The advantage gained by this increase in surface area is increases the absorption of nutrients.
The small intestine is a tube-shaped canal consisting of three parts, namely the duodenum, jejenum, and ileum which function to complete the digestion of food by chemical digestion for later absorption. The small intestine is made up of villi, circular muscles, longitudinal muscles, mucous lining, and epithelium.
Villi are mucous membrane projections that protrude into the lumen of the small intestine which are composed of blood vessels, lymph vessels, and goblet cells. The protrusion of the mucous membrane serves to expand the surface of the small intestine so that it can increase the absorption of nutrients in the form of protein and fat that have been digested by the small intestine.
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can all genetic mutations be observed with a karyotype and explain
Answer:
Yes.
Explanation:
Karyotypes can reveal changes in chromosome number associated with aneuploid conditions, even such as chromosome abnormalities and diseases.
32-year-old woman presents due to several days of vaginal itching & d/c. She also has pain with sexual intercourse. She denies fever, chills, abdominal pain, urinary frequency or dysuria. In the past years she has had 2 new male sexual partners. She takes OCP & uses condoms on most occasions. Patient denies any chronic medical conditions & denies prior surgeries. Denies any other medications. Her LMP was 3 weeks ago. Temp is 36.7C (98F) & BP: 100/60. Pelvic exam shows vulvar & vaginal erythema & a small amount of vaginal d/c with a pH of 4. Which of the following is the most causative organisms?A. Candida albicansB. Chlamydia trachomatisC. Gardnerella vaginalisD. Neisseria gonorrheaeE. Trichomonas vaginalis
Trichomonas vaginalis is the causative agent of vaginal erythema or vulvovaginitis.
The correct option is option E.
Trichomonas vaginalis is basically an anaerobic as well as a flagellated protozoan parasite which is the causative agent of a particular sexually transmitted disease which is known as trichomoniasis. It is basically the one of the most common pathogenic protozoan which happens to infect humans. The infection rates are similar in men as well as women but women are the ones who are mostly symptomatic whereas the infections in men are mostly asymptomatic.
Transmission basically occurs through a direct, skin-to-skin contact with a particular infected individual, which is most often through the vaginal intercourse. Risk factors consist of multiple sexual partners and also not using condoms during sexual intercourse. It causes a genital itching foul-smelling vaginal discharge, and painful urination in women.
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2.
Chapter 7 Cell Structure and Function
Concept Map
Using information from the chapter, complete the concept map below. If there is
not enough room in the concept map to write your answers, write them on a
separate sheet of paper.
Ident
function
in
Photosynthesis
Cells
include
3.
functions
in
Support and
protection
eurargedic
Cells
include
fungi
Cells
6.
Organelles
So with
Nucleus
stores
Graphic Organizer
a nucleus
multicellular.
Animal
cells
function
in
Releasing
usable energy
for the cell
include
5.
function
in
Producing
proteins
Pearson Education, Inc. All rights reserved.
Teaching Resources/Chapter 7
The correct options to fill in the gaps are as follows:
2. chloroplasts function in photosynthesis.
3. cytoskeletons function in support and protection.
4. mitochondria function in releasing usable energy for the cell.
5. ribosomes function in producing proteins
6. nucleus - stores genetic information
What are cell organelles and their functions?A cell organelle is a subcellular structure that, like an organ in the body, has one or more specific tasks to carry out within the cell.
Some cell organelles and their functions include:
The nucleus - which houses genetic material,
the mitochondria - which generate chemical energy, and
the ribosomes - which put together proteins, are some of the more significant cell organelles.
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your colleagues in the legal department are preparing to take a case to trial. to help them, write your description of the process of dna fingerprinting so a jury could understand it.
The DNA fingerprinting procedure includes:
Isolation of DNA from skin, hair, or blood cells.The isolated DNA is then cut using restriction enzymes and the fragments of various lengths are analyzed.With the help of gel electrophoresis various DNA fragments are obtained. The gel is then immersed in a NaOH solution which denatures the DNA into single strands.Southern blotting was used to transfer DNA from the gel onto a nitrocellulose membrane. Then, this DNA is hybridized with a radioactive probe.Fraction patterns are considered unique for each individual, which is compared with the suspect.With the help of X-ray films, DNA samples showing radioactivity are compared.DNA fingerprinting is considered as a chemical test, which displays the genetic makeup of a person or other living organism. This method was developed by Alec Jeffrey in 1984. This method is used as a paternity and maternity test, criminal identification, and for personal identification.
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why does the level of co2 affect the global temputure
for an individual with this genotype: mmnnoopp, what proportion of their haploid gametes would have the following genotype: mnop?
An individual with the genotype mmnnoopp has two copies of each of four different alleles. During meiosis, this individual produces four haploid gametes, each carrying one allele from each of the four gene loci.
The probability of any particular gamete carrying the m, n, o, or p allele is 0.5, since the individual has two copies of each allele. The genotype mnop requires the presence of one copy of each of these four alleles.
Therefore, the probability of a gamete carrying the genotype mnop is 0.5 x 0.5 x 0.5 x 0.5 = 0.0625, or 6.25%. Thus, approximately 6.25% of the haploid gametes produced by an individual with the genotype mmnnoopp would have the genotype mnop.
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The number 12.68 x 102, when expressed in correct scientific notation, becomes ________.
A) 1268 x 104
B) 0.1268 x 100
C) 1.268 x 103
D) 1.268 x 10-3
Technically 12.38 × 10^2 is in scientific notation ; any number expressed in the form a × 10^b is in scientific notation.
However, it is not in normalized scientific notation . In normalized scientific notation, there is exactly 1 non-zero digit to the left of the decimal point in the a term (with an exception being made for zero which in scientific notation is written as 0.0 × 10^1).
In normalized scientific notation, your original value would be written as
1.238 × 10^3
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colonomics - predictive models for normal colon gene expression and dna methylation for twas and mwas.T/F
The statement about colonomics - predictive models for normal colon gene expression and DNA methylation for TWAS and MWAS is true.
Thus, the correct answer is true.
What is colonomics?Colonomics is а multi-omics dаtаset thаt includes 250 sаmples: 50 sаmples from heаlthy colon mucosа donors аnd 100 pаired sаmples from colon cаncer pаtients (tumor/аdjаcent). From these sаmples, Colonomics project includes dаtа from genotyping, DNА methylаtion, gene expression, whole exome sequencing аnd micro-RNАs (miRNАs) expression.
The genetic prediction models represent reference imputаtion pаnels for normаl colon tissue methylаtion аnd gene аnd miRNА expression, which аre of high interest for performing TWАS studies for colon-relаted diseаses.
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To identify the genotype of yellow-seeded pea plants as either homozygous dominant (YY) or heterozygous (Yy), you could do a test cross with plants of genotype _______.
You could perform a test cross with plants of genotype yy to see whether yellow-seeded pea plants are homozygous dominant (YY) or heterozygous (Yy).
YY is the genotype (homozygous recessive). The genotype of the heterozygous yellow-seeded plant will therefore be "Yy," whereas the genotype of the green-seeded plant will be "yy" (as the recessive allele is expressed only in homozygous conditions).
The genotypes (allele combinations) and phenotypes (observable traits) of progeny from genetic crossings can be predicted using a Punnett square. An organism with a dominant trait can be tested to see if it is homozygous or heterozygous using a test cross. The genotype of the parent will be homozygous dominant (TT) if the outcome is all tall plants.
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FILL IN THE BLANK. The sympathetic nervous system arouses us for action and the parasympathetic nervous system calms us down. Together, the two ___ systems make up the ___ nervous system.
We are awakened for action by the sympathetic nervous system, and we are calmed by the parasympathetic nervous system. This same autonomic nervous system is comprised of the two systems combined.
The nervous system is what?The nervous system is made up of the brain, intervertebral discs, and a complex network of nerves. This route is the link between the neurons and the muscles. The brain controls every physical process. The vertebral column descends down the spine beginning with the brain.
What is within the nervous system's control?The neurological system carries signals sent by the brain towards other bodily components, including the major organs. Thus, the activity of the neural system controls a number of processes, such as the ability to move, breathe, see, as well as communicate.
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To measure primary productivity in a grassland ecosystem, you should _____.
A). exclude consumers; periodically mow, collect, and weigh the plants; and calculate plant biomass production per unit time
B). measure the solar energy influx to the site
C). measure the growth of all of the consumers in the system
D). measure the total biomass of organisms per unit area
A). keep customers out; mow, collect, & weigh the plants on a regular basis; and compute plant biomass production every unit time.
By monitoring peak above-ground biomass, above-ground net primary production (NPP) may be calculated in many temperate & annual grasslands.
Productivity in ecology refers to the rate at which energy, in the form of biomass, is added to a bodies of organisms. Simply said, biomass is the quantity of material that an organism or collection of organisms store in their body. In general, the biomass of cultivated land is equivalent to that of temperate grassland. The largest total primary productivity is seen in coral reefs and algal beds, as shown in the graph. The net primary production of an estuarine ecosystem is approximately twelve times greater than that of the open ocean.
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explain how the epithelium in each of the following regions of the respiratory tract is adapted so its structure follows its function
Epithelial cells that have ciliated surface features line the upper portion of the respiratory tract. Toxins, particulate materials, and microbes that enter the airway are assisted by cilia in their capturing, sweeping, and expulsion.
What kind of epithelium lining the respiratory tract is there?Six different cell types make up the pseudostratified ciliated epithelium that makes up the respiratory epithelium. 90% of the cells population is made up of three of these: basal cells, ciliated cells, and goblet cells.
What is the airway epithelium's structure?In the large airways, the airways epithelium is pseudostratified, while in the tiny airways, it becomes columnar and cuboidal. Ciliated, columnar, undifferentiated, secretory, and basal cells are the main cell types.
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The allele for yellow seeds masks the allele for green seeds in pea plants. A
true-breeding pea plant with yellow seeds is crossed with a true-breeding pea
plant with green seeds. Which statement reflects evidence of the law of
segregation in the offspring?
A. The F₁ generation will have only plants with green seeds, but the
F2 generation is likely to include both plants with yellow seeds and
plants with green seeds..
B. The F₁ generation will have only plants with yellow seeds, but the
F2 generation is likely to include both plants with yellow seeds and
plants with green seeds.
C. The F₁ generation will include more plants with green seeds than
the F2 generation.
D. The F₁ and F₂ generations are likely to have equal ratios of green
seeds to yellow seeds.
The correct statement is B. The F₁ generation will have only plants with yellow seeds, but the F2 generation is likely to include both plants with yellow seeds and plants with green seeds.
The law of segregation states that the two alleles for a trait separate during gamete formation and end up in different gametes. In the F1 generation, the yellow allele masks the green allele, so all of the plants will have yellow seeds. However, in the F2 generation, the offspring will receive one allele from each parent during fertilization, so some offspring will have yellow seeds and some will have green seeds, reflecting the separation of the alleles.
Describe translation.
Answer:
Translation is the process of changing information contained in nucleic acids into amino acids. It also pertains to the manner in which proteins are made from mRNA templates. The nucleotide sequence on the RNA is translated into the amino acid sequence of proteins during the translation process.
Explanation:
Help
Analyze the image below. The fossils in each of the layers shown in the image are found in many locations. These organisms lived for a short period of geologic time. To which classification do these fossils belong?
A) range fossils
B) microfossils
C) index fossils
D) trace fossils
Range fossils in each of the layers shown in the image are found in many locations.
What is fossil?
Fossils are the remains or signs of prehistoric life that have been preserved by the forces of nature. Shells, bones, exoskeletons, things preserved in amber, petrified wood, coal, hair, oil, and Genetic traces are a few examples of fossils. Another type of fossil is a skeletal structure.
What is Range fossils ?
The temporal interval between a fossil's first and last occurrences in the rock strata/sediment records serves as the best definition of a fossil range. We can infer when and how long specific species may have existed in the past by comprehending fossil ranges and being able to date rock strata.
Therefore, Range fossils in each of the layers shown in the image are found in many locations.
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Aquaporins are special water channels that allow the bulk transport of water across the hydrophobic plasma membrane. Which of the following is NOT true about them: A.mutations on genes associated with them can lead to certain medical conditions (e.g. diabetes, vision problems, etc.). B.plants use them to not only transport water, but help with metal detoxification. C.All are true. D.they are vital for kidney function in mammals. E.they require the use of ATP to function.
Option E is Correct. Special water channels called aquaporins enable the bulk movement of water across the hydrophobic plasma membrane.
They do not require the consumption of ATP in order to function, which is a false statement about them. The majority of known AQP2 gene mutations result in an erroneous 3-dimensional protein folding of the aquaporin 2 protein. The misfolded protein is entrapped inside the cell, preventing it from moving water molecules to the cell membrane.
Aquaporins efficiently speed up the total rate of water diffusion across the cell membrane due to the slow diffusion of water through the lipid bilayer. Aquaporins (AQP) are essential membrane proteins that act as conduits for the passage of water and, occasionally, tiny solutes.
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What would happen if a chromosome contains a mutation such that it Cannot bind to the kinetochore complex?
Chromosomes would not be able to bind with the mitotic spindle if a chromosome can not bind to the kinetochore due to mutations.
Mutations are very frequent in the process of gene transfer i.e indirectly with the chromosomal crossover. If a mutation occurs in such a manner that a chromosome can not be bound to a kinetochore then the chromosomes will lose the tendency to adhere to the mitotic spindle.
This failure of attachment will result in the arrest of a metaphase cell cycle. Without such arrest anaphase progression would not take place and thus leading to the failure of chromatids segregation.
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he piece of DNA written below was found by an undergraduate researcher while examining a novel bacteria strain. Show the undergraduate researcher what the doublestranded DNA would look like for this single strand of DNA. Make sure you show all important chemical components that describe DNA orientation.
5 ′
−
GGCGAATCATGCGCTGCCTTGTTTCCACTAGTAGACGCGGGACTTGGTTTCACACATGACGCGT
Deoxyribose and phosphate groups alternately form the backbone of each strand. One of the four bases—adenine (A), cytosine (C), guanine (G), or thymine—is joined to each sugar (T).
How many hydrogen bonds, in comparison to C and G, can A and T form?Adenine and Thymine are joined by two hydrogen bonds, but Guanine and Cytosine are joined by three hydrogen bonds.
What kind of bonds make up the double helix?A hydrogen bond between the G-C and A-T base pairs holds the two complementary strands of nucleotides that make up each DNA molecule's double helix together. One DNA strand serves as a template for the creation of a complementary strand, which results in the duplication of the genetic code.
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Interpret the model
(A DNA structure with a green thing in the middle and small red circles floating upwards)
Drag "True" or "False" to the end of each statement.
The blue ovals are hydrophobic. The strings of little red dots represent carbohydrates. The many black lines represent amino acid tails. The model is called a bilayer because there are two main types of molecules present, lipids and proteins. This model shows membrane transport. The blue ovals represent phospholipid heads.
The statement:
The blue ovals are hydrophobic is true.
The strings of little red dots represent carbohydrates is false
The many black lines represent amino acid tails is false
The model is called a bilayer because there are two main types of molecules present, lipids and proteins is true.
This model shows membrane transport is True.
The blue ovals represent phospholipid heads is true.
This model depicts a biological membrane, especially a bilayer. A bilayer is made up of two kinds of molecules: lipids and proteins. The blue ovals in the model are phospholipid heads, which are hydrophilic molecules that compose the outer layer of the membrane. The green molecule in the middle of the figure is encircled by little red circles, which represent carbohydrates. The many black lines indicate hydrogen bonding, which are crucial for the structure and stability of the membrane. This model depicts a membrane transport mechanism in which molecules travel from one side of the membrane to the other. Molecules travel across the membrane by passing through the phospholipid head or being carried by proteins anchored in the membrane. This model depicts how the structure of the bilayer and its constituents promote molecular transport across the membrane.
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