Explanation:
a) Case1, by the formula, ke=½mv².
m=2kg, v=2m/s
ke = ½×2×2² = 4J
Case2, by the formula, ke=½mv².
m=4kg, v=3m/s
ke = ½×4×3² = 18J
therefore, the second object has more kinetic energy.
b) Case1, by the formula, pe = mgh
m=2kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe1(write 1 in subscript) = 2×9.8×10= 196J.
Case2, by the formula, pe = mgh
m=4kg, g=9.8m/s²(not given)(can consider 10m/s² when given), h= 10m
Pe2(write 2 in subscript) = 4×9.8×10= 392J.
so, the object 2 has more potential energy.
hope this helps you.
Where in the cell would you expect to find the greatest activity of the pyruvate dehydrogenase complex?
Answer:
Mithochondria
Explanation:
In eukaryotes, the pyruvate dehydrogenase complex, like the enzymes for citric acid cycle and oxidation of fatty acids, is located in the mitochondrion, where is associated with the surface of the inner membrane facing the matrix.
In the cell, mitochondria are the place where it expects to find the greatest activity of the pyruvate dehydrogenase complex.
What is the pyruvate dehydrogenase complex?The three-enzyme complex known as the pyruvate dehydrogenase complex (PDC) is responsible for pyruvate carbonylation, which converts pyruvate to acetyl-CoA.
This complex connects the glycolysis metabolic pathway to the citric acid cycle by allowing acetyl-CoA to be used to perform cellular respiration.
The enzyme pyruvate dehydrogenase catalyzes the reaction between pyruvate and a lipoamide, which yields acetylated dihydrolipoamide and carbon dioxide. The process requires the coenzyme thiamine pyrophosphate.
Therefore, the site where you find the greatest activity of the pyruvate dehydrogenase complex is mitochondria.
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12. Which is NOT a natural cause of extinction?
A. Disease
B. Catastrophic events
C. Introduction of new species
D. Competition due to overpopulation
24. Which is NOT true about energy transformation?
A. Energy is essential to all organisms.
B. Food contains energy that is needed by all organism.
C. Heterotrophs feed on autotrophs and other heterotrophs to gain energy.
D. Autotrophs do not need energy because they can produce their own food.
23. Which is the CORRECT sequence of events in cellular respiration?
A. Glycolysis - fermentation - Krebs Cycle
B. Glycolysis - Krebs Cycle - Electron Transport
C. Krebs Cycle - Electron Transport - Glycolysis
D. Krebs Cycle - Glycolysis - Electron Transport
2. In humans there are four types of blood; type A, type B, type AB and type O. A person with a genotype of IaIa or Iai will have blood type_____?
A. A
B. B
C. O
D. AB
4. A couple has four children, one son and three daughters. What is the chance that the fifth child will be a daughter?
A. ¼
B. ½
C. ¾
D. 1/5
22. Cellular respiration releases energy by breaking down_______.
A. ATP
B. water
C. carbon dioxide
D. food molecules
5. A man is colorblind but there is no history of this disorder in his wife’s family. What is the chance that their son is color
blind?
A. 0
B. 25%
C. 75%
D. 100%
25. Which BEST summarizes the process of respiration?
A. Water + Carbon Dioxide ( light) sugar + oxygen
B. Sugar + Oxygen (enzymes) water+ carbon dioxide +energy
C. Water + Sugar ( light ) carbon dioxide + oxygen
D. Oxygen + Water (enzymes) sugar + carbon dioxide + energy
1. A father with blood type AB and a mother with blood type O will probably produce offspring with a blood type ___. *
A. A
B. B
C. A or B
D.AB or O
6. What is a sex- linked trait that results in the inability to have normal blood clotting?
A. baldness
B. color blindness
C. diabetes
D. hemophilia
11. What causes species extinction?
A. Pollution and reforestation
B. Reforestation and carbon emission
C. climate change and over consumption
D. conservation and consume
18. The pigment molecules responsible for photosynthesis are located in the _______? *
A. Mitochondria
B. Cytoplasm of the cell
C. Stroma of the chloroplasts
D. Thylakoid membrane of the chloroplasts
13. Which part of a leaf contains most of the chloroplasts?
A. Lower epidermis
B. Palisade mesophyll
C. Spongy mesophyll
D. Upper epidermis
19. At optimum light intensity, which atmospheric gas most directly influences the rate of photosynthesis?
A. Nitrogen
B. Oxygen
C. Sulfur
D. Carbon Dioxide
14. What part of the leaf is this tiny opening in the lower epidermis which makes it rough and responsible for the entrance and exit of gases in plants?
A. xylem
B. phloem
C. stomata
D. guard cells
16. In which part of the chloroplast does light reactions of photosynthesis takes place?
A. Grana
B. Stroma
C. Inner membrane
D. Outer membrane
17. Which is NOT needed to make food in plants?
A. Flower
B. Sunlight
C. Chlorophyll
D. Carbon Dioxid
8. Color-blindness is inherited as a sex-linked recessive trait. If a normal woman, carrier of the gene marries a man with normal color vision. What would be the expected phenotype of their children with reference to color-blindness?
A. All color-blind
B. 2 carriers, 2 color-blind
C. 1 normal, 3 carriers
D. 2 normal, 1 carrier, 1 color-blind
3. Blood type O has both antibodies A and antibodies B in the plasma but has no antigen on its erythrocytes or red blood cells. That is why Blood Type O is considered UNIVERSAL______.
A. Blood
B. Donor
C. Marker
D. Recipient
7. Melvin’s thinning hair is like that of his father. This characteristic of baldness is due to
A. multiple alleles
B. sex-linked
C. sex-influenced
D. sex-limited
Answer:
12.B
17. A
11. C
13. B
16. A
7. B
8. B
19. D
23. B
help meeeeeeeeeeeeeeeeeeeeeeeee
Answer:
Question is not presented
Explanation:
how long do monoclonal antibodies last in the body
Answer:
About a month.
Explanation:
Almost end of semester, HELP!!
Specialized structures are expressed with the help of mRNA. What role does mRNA play? (5B)
Assisting with replication by producing glucose
Creating bonds to form large polymers
Providing information from DNA that is used to form proteins
Making energy available for cellular activities
Answer:
The answer is C Providing information from DNA that is used to form proteins
Explanation:
i took the test
The statement that demonstrates the role that mRNA play in protein synthesis is as follows:
It provides information from DNA that is used to form proteins.Thus, the correct option for this question is C.
What is Protein synthesis?Protein synthesis may be defined as a type of biological process through which polypeptide chains are formed from coded combinations of single amino acids inside the cell. The process of protein synthesis terminates with the help of two processes:
Transcription.Translation.The process of transcription involves the copying of a DNA sequence of a gene in order to make an RNA molecule. This RNA molecule is known as mRNA which determines the linkage of DNA from the manufacturing of the proteins. This process is carried out in the nucleus of the cell.
While the process of translation involves the synthesis of proteins using the genetic information carried in messenger RNA (mRNA). This process is carried out in the cytoplasm of the cell.
Therefore, the correct option for this question is C.
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in DNA, ________ always forms hydrogen bonds with Guanine (G)
Answer:
in DNA, Cytosine always forms hydrogen bonds with guanine
hope help you
Answer:
cytosine
Explanation:
which of the following cells contain a plasma membrane?
Explanation:
Like prokaryotes, eukaryotic cells have a plasma membrane (Figure 3.9) made up of a phospholipid bilayer with embedded proteins that separates the internal contents of the cell from its surrounding environment.
A partial marine food web is shown.
image
Which of the following lists only organisms that are secondary consumers in this food web?
A.
euphausilds, sweeps, water fleas, sea urchins
B.
crabs, pilchards, blennies, snappers
C.
blennies, sweeps, tiger sharks, dolphins
D.
bull kelp, sweeps, water fleas, dinoflagellates
Crabs, pilchards, blennies and snappers are the examples of secondary consumers.
Crabs, pilchards, blennies and snappers are considered as secondary consumers because they feed on primary consumer which feed on producers such as plants and algae. Secondary consumer are those organisms which feed on herbivorous organisms or primary consumers.
They can feed on producers due to different digestive system so we can conclude that crabs, pilchards, blennies and snappers are the examples of secondary consumers.
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Animals are helpless when their natural habitat is damaged by floodsor forest fires. What are the ways to prevent these from occurring sothat animals do not suffer?
Answer:
Obey local laws regarding open fires, including campfires, Keep all flammable objects away from fire, have firefighting tools nearby and handy, Carefully dispose of hot charcoal,
Drown all fires, Carefully extinguish smoking materials, do NOT use fireworks in heavily wooded areas, use in large, open areas with concrete flooring.
Explanation:
Identify the scenario that could potentially result in new combinations of DNA in the offspring of the individual.(1 point)
An error that happens during DNA replication in a cancerous lung cell during before mitosis.
Sister chromatids fail to separate during anaphase of mitosis in a heart cell.
Exposure to UV radiation causes a mutation in a skin cell that is repaired by the cell.
A pair of homologous chromosomes fails to separate during anaphase I of meiosis.
Answer:
A pair of homologous chromosomes fails to separate during anaphase I of meiosis.
The scenario could potentially result in new combinations of DNA in the offspring of the individual is a pair of homologous chromosomes fail to separate during anaphase I of meiosis. The correct option is d.
What is DNA?DNA is deoxyribose nucleic acid. The information molecule is DNA. It stores instructions for the production of larger molecules known as proteins.
These instructions are stored within each of your cells and are distributed across 46 long structures known as chromosomes. These chromosomes are composed of thousands of shorter DNA segments known as genes. During anaphase, I of meiosis, a pair of homologous chromosomes fails to split.
Therefore, the correct option is d, A pair of homologous chromosomes fails to separate during anaphase I of meiosis.
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How many carbon atoms does glucose have
Answer:
six carbon atoms
Explanation:
Glucose has an aldehyde group (-CHO) on carbon atom number one and is therefore called an “aldose,” also it has six carbon atoms (a hexose) so it can be called an “aldohexose.” The reactive group on fructose, however, is a ketone group (-C=0) on carbon number two.
Item 3
Which statement is true of chloroplasts?
They transport glucose into the cell.
They are present in animal cells, but not in plant cells.
They convert light energy into chemical energy.
They convert the energy in glucose into a more usable form.
Answer:
They convert light energy into chemical energy.
Explanation:
Food moving through the G.I. tract spends the most time in which of the following organs?
Answer:
a. Large intestine
Explanation: is correct
Answer:
Large Intestine
Explanation:
hope it helps
what cells are the stem cells for spermatogenesis?
Answer:
Spermatogonial stem cells
Explanation:
Let me know please for a important quiz :( worth points
Explanation:
Title is no use in graph
hope it's is right
HELPPPPPPPPPPPPPPPPPP
A: equilateral and right
B: equilateral and isosceles
C: isosceles and scalene
D: isosceles and right
Answer:
It's B: equilateral and isoscleles Explanation: both those words mean triangle with equal sides :)
To some extent, sensory receptors in the skin are specialized to detect and register specific stimuli. Please select the best answer from the choices provided T F.
Sensory receptors in the skin being specialized to detect and register
specific stimuli is True.
The skin is an example of a sense organ found in the body . It contains
receptors which helps to detect and respond to stimuli. There are
different stimuli such as touch, pressure, pain and temperature
This means that the skin being a sense organ is able to detect and register
specific stimuli as a result of the presence of its receptors.
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Answer:
True or False? TRUEExplanation:
What is commensalism
Answer:
an association between two organisms in which one benefits and the other derives neither benefit nor harm.
Explanation:
a mammalian stem cell line has a doubling time of 24 hours. if you start with 350,000 of these cells, approximately how many cells would be present after 60 hours of growth?
After 60 hours of growth, there is approximately 2 million cells.
Let y represent the number of cell after x hours.
The bacteria doubles every 24 hours, also there are initially 350000 cells hence:
[tex]y=350000(2)^\frac{x}{24}[/tex]
The number of cells after 60 hours is:
[tex]y=350000(2)^\frac{x}{24}\\\\y=350000(2)^\frac{60}{24}\\\\y = 1979899[/tex]
Therefore after 60 hours of growth, there is approximately 2 million cells.
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A note to Charles Darwin about his findings
Answer:
Dear Charles Darwin,
My name is ___ and I was wondering how all of your theories and findings came to your comprehension of evolution. I have heard and learned about your evolution theories and would like if you could answer some of my questions. What first sparked the interest in evolution? Do you truly believe that everything evolves over time? How do your findings contribute to your theories of evolution? Thank you for your time to answer these questions.
Sincerely ___
Explanation:
Charles Robert Darwin was a British naturalist, geologist, and biologist best known for his contributions to evolutionary science. His dissertation that all kinds of life are derived from a common ancestor is widely accepted today and is considered a basic concept of science.
white blood cells that engulf and destroy pathogens
There are 2 of them :-
1) Phagocytes
2) Macrophages.
These WBCs attach themselves to disease causing pathogens & then engulf them resulting in the destruction of the pathogens.
_________
Hope it helps!
꧁✿ ᴿᴬᴵᴺᴮᴼᵂˢᴬᴸᵀ2222 ✬꧂
Fungi compose a very minor component of life in marine ecosystems yet are vital to the health of terrestrial ones. This is primarily due to their ability to:
Answer:
Break down lignin.
Explanation:
The continual slow degradation of the phenolic portions of lignin (humic acids) provides a long-term supply of nutrients to plants. Phytoplankton (the primary producers in aquatic systems) do not synthesize appreciable amounts of lignin, and so fungi are not necessary to decompose it!
Inside an active mitochondrion, most electrons follow which pathway?.
Answer:
Citric Acid Cycle
Explanation:
The ____________ receives the filtrate from the DCTs of several nephrons and funnels it toward the ____________ .
Answer:
collecting duct, renal pyramid
Explanation:
The collecting duct receives the filtrate from the DCTs of several nephrons and funnels it toward the renal pyramid.
please help i will give brainliest
Answer:
Mark Brainliest
Explanation:
Trap NestSaltStarter MashInternetPneumoniaPeiits GoatsChicken CoopPlankTonsFertilizerPlease help a girl out !
Answer:
3=??
5=B
6=C
7=J
8=E
9=G
Explanation:
❤️ sorry I don't know 3 number
Active transport requires energy from the cell. A True
B False
Answer:
A TRUE
Explanation:
Answer:
A
Explanation:
active transports moves things against the gradient so it requires energy
passive transport diffuses with the gradient so it doesn't require energy
The tiny bones of the middle ear are collectively known as the A. otoliths. B. scala media. C. ossicles. D. stapes.
Answer:
C. Ossicles
Explanation:
Answer:
The tiny bones of the middle ear are collectively known as the ossicles.
Explanation:
The ossicles (the three tiny bones in the middle ear) are responsible for amplifying sound vibrations from the eardrum.
Which of the following describes a similarity of the cerebellum and cerebrum?
Answer:
b. They both have an outer layer made of grey matter and an inner layer made of white matter.
Explanation: is correct
Which choice has prokaryotic cells?
human blood
cow's liver
onion root
E. coli
Answer:
E coli.
Explanation:
E coli is a prokaryotic organism, meaning it is comprised of only one cell.