What are the two most common types of secondary structure found in proteins?

1- α-helices and β-arrays
2- double stranded helices and β-arrays
3- α-helices and β-pleated sheets
4- β-spirals and α-turns

Answers

Answer 1

Answer:

1- α-helices and β-arrays


Related Questions

Name the organ that helps a turtle to swim in water?​

Answers

Answer:

Turtles utilize all four of their legs, extending them to propel themselves through the water.

Explanation:

what is one variable that friction depens on
A. how much light there is
B. the color of the objects
C. how hard the surface of the objects are being pressed together

Answers

C. how hard the surface of the objects are being pressed together. :)

DNA is know as the molecule of life because it

Answers

Often referred to as the molecule of life, DNA (deoxyribonucleic acid) is found in almost all living things. It acts as a type of chemical code that contains instructions, known as genes, for how the body and all its different parts grow, develop, function, and maintain themselves.

I need help with question 18 the question is below are functions of y=[x] and y=[x] -3 how are the functions related

Answers

Answer:

The first one

Answer:

I'd say it's the first option.

Explanation:

If you look at the units for each graph, the lines are both going up 1 and over 1, so this means their slopes are the same.The y-intercept of y[x] is 0, because if you look at the first graph, that's where both lines intercept the y-axis.The second function's y-intercept is in fact -3 because, that's where those lines intercept the y-axis.

Hope this helps you :)

PLEASE HELP WHAT IS THIS BUG

Answers

Answer:

i dont know

Explanation:

Sort of looks like a carpet beetle larva…but it’s hard to tell not knowing your location! If it is that, it’s harmless!

Question 10(Multiple Choice Worth 50 points
(01.08 MC)
Arcology is a type of urban design that combines ecology and architecture to provide sustainable urban growth options. Which statement describes an
arcology principle for sustainability?
O Build taller buildings with more homes
O Build fewer balconies and courtyards
O Purchase inexpensive imported food
Increase single use items

Answers

Purchase inexpensive imported food increase single use items

Answer:

increase single use items

Explanation:

it means less productits to be use it is better for the earth and humans.

In two to four sentences, describe how money is channeled from savers to borrowers and then to investors.

Answers

Answer:

Money is channeled through financial institutions such as banks.

Explanation:

The borrower may chose to use the funds to invest in a business venture and thus be becomes an investor. Money is channeled through financial institutions such as banks. A saver saving with a bank account seeks to keep the money in the bank as it earns him interest.

Which of the following systems does NOT excrete some form of waste ?

A: Urinary

B: Integumentary

Or C: Skeletal

Answers

Answer:

Option C is write answer

su**

Which type of mutation reverses the direction of parts of a chromosome?

Deletion
Duplication
Inversion
Translocation

Answers

Answer:

Its "C"  Inversion

Explanation:

I took the test and got it correct

Type of mutation reverses the direction of parts of a chromosome is inversion. The correct answer is option C.

What is the basic structure of chromosome ?

The chromosomes are thread like structures present in the nucleus and the  these chromosomes carry the genetic information in them from one generation to another.

Inversion inverts the structure of chromsome and it basically turns the chromsomes inverted.

Inversion is the process where one arm of the chromosome gets detached from the basic structure and it gets attached in the inverted direction.

This  creates multiple copies of DNA turning it into genetic material and one of the X linked recessive disorders is haemophilia in which same type of mutation caused by the chromosome at the 8th position takes place.

Therefore, Mutation that reverses the directions of the part of the chromosome.

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What is the most likely explanation for
the DNA found in mitochondria?

Answers

Answer:

Origin. Nuclear and mitochondrial DNA are thought to be of separate evolutionary origin, with the mtDNA being derived from the circular genomes of bacteria engulfed by the early ancestors of today's eukaryotic cells.

Explanation:

60 POINTS! Describe the structure of atoms, including the electrical charges, the location (in or out of nucleus) and atomic mass (1 amu or less than 1 amu) of the following particles:1 pt for each blank Electron Charge____ Location __________ Mass ________ Neutron Charge ____ Location __________ Mass ________ Proton Charge ____ Location __________ Mass _________ Use the periodic table tile to answer questions #2 & 3 regarding Helium. 2. What is the atomic mass of Helium? Using that, determine the number of neutrons in a Helium atom. 3.What is the atomic number of Helium? What subatomic particle does it refer to? 4. Use the atomic model below to answer the following questions: 1 pt for each blank A picture containing chartDescription automatically generated a. How many protons? b. How many neutrons? c. What is the name of this atom? 5. Explain what a valence electron is. Using the atomic structure above (#4) give the number of valence electrons. 6. Describe the physical properties of Copper (Cu) based on what you know about metals, nonmetals, and metalloids. 7. What specific information about the atomic structure do the periods and groups give you? 8. 5 ZnSO4 a. Count the number of Sulfur atom = b. How many total atoms are given in the compound = 9. Li2SO4 a. Count the number of Sulfur atom = b. How many total atoms are given in the compound = 10. Al2(SO3)3 a. Count the number of Sulfur atom = b. How many total atoms are given in the compound = 11. A student conducts an experiment to separate water into hydrogen and oxygen as shown below. DiagramDescription automatically generated As a result the student collects 28.0 g of hydrogen and 224.0 g of oxygen. How many grams water did the student originally have involved in the experiment? 12. A nugget of gold has a mass of 965 g and a volume of 50 cm3. What is the density?

Answers

Answer: electron negative outside less than one amu

nuetron none inside one amu

protons positive inside one amu

2. nuetrons 2.0026

Explanation:

ssrrryyy i did all the things i could

What are the functions for d the organelles in an animal
Cell?

Answers

Answer:

Centrioles - Centrioles are self-replicating organelles made up of nine bundles of microtubules and are found only in animal cells

I WILL GIVE BRAINIEST IF CORRECT!!!

Describe, step by step, how the epicenter of an earthquake can be located.

Answers

Answer:

me please mark me pleass

Explanation:

Using your compass, draw a circle with a radius equal to the number you came up with in Step #2 (the radius is the distance from the center of a circle to its edge). The center of the circle will be the location of your seismograph. The epicenter of the earthquake is somewhere on the edge of that circle.

What is the nervous system composed of?
A. The central nervous system
B. The peripheral nervous system
C. The respiratory system
D. Answers A & B


Answers

Answer: D) the central and peripheral nervous systems

hope this helps

The ability to taste the chemical PTC is determined by a single gene in humans with the ability to taste given by the dominant allele T and the inability to taste by the recessive allele t. Suppose two heterozygous tasters (Tt) have a large family.

QUESTION A: Predict the proportion of their children who will be tasters and non-tasters. Use a Punnett square to illustrate how you make these predictions.

QUESTION B: What is the likelihood that their first child will be a taster?

Answers

Answer:

ok

Explanation:

Tt x Tt= 1:TT 2:Tt 1: tt 75% of the offspring are PTC tasters (TT and Tt) 25% are not (tt). Every time they have a child, the odds are 75% taster, 25-% not.

Which is a structural adaptation an octopus would use for movement?
(For Connexus Middle School)

A) the ability to release a cloud of ink

B) camouflage

C) suction cups on limbs

D) limbs that release when trapped

Answers

Correct Answers:

suction cups on limbs

Hibernation reduces the energy required for survival.

The breathing rate of the lizard will change with temperature, because it is an ectotherm.

Explanation:

hope it helps

 The structural adaptation an octopus would use for movement is suction cups on limbs.

What is octopus?

Octopuses are highly clever creatures that have mastered camouflage and have developed a variety of cunning strategies over tens of millions of years to evade or prevent potential predators. They are able to blend in with their surroundings' colors and textures, enabling them to remain undetected.

Octopuses can quickly flee if a predator approaches by launching themselves forward by ejecting water from a muscular tube known as a siphon. Additionally, octopuses have the ability to expel a cloud of black ink that hides them and impairs an intruder's ability to smell.

Therefore, The structural adaptation an octopus would use for movement is suction cups on limbs.

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6. Which is not a product of photosynthesis? nitrogen glucose water oxygen

Answers

Nitrogen is not a product of photosynthesis

____ are a result of hurricanes which push massive amounts of water inland causing severe damage

storm surges
tornadoes
tropical depressions
supercells

Answers

Storm surges is the correct answer

storm surges are a result of hurricanes which push massive amounts of water inland causing severe damage.

What is Storm surges?

Storm surges caused by hurricanes are very damaging and deadly because they can come unexpectedly and send a significant amount of water into areas of human settlements including homes and businesses. When this happens they cause loss of life and property damage.

Thus, option "A" is correct.

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Why did the human population grew from 1000 BCE until about 1930?

Answers

Human population has grown exponentially over the past century. It has done so largely by producing large amounts of food, and learning how to control disease. Ten thousand years ago, when humans first invented agriculture, there were maybe one million humans on the planet.

- BRAINLIEST answerer

Answer:

Explanation:

Human population has grown exponentially over the past century. It has done so largely by producing large amounts of food, and learning how to control disease. Ten thousand years ago, when humans first invented agriculture, there were maybe one million humans on the planet.

How many different types of tissue cells are there in humans?
A. 2,000
B. 20,000
C. 20
D. 200

Answers

Answer:

200

.........................................

4. Which type of air holds more water vapor?
Cold Air
Frigid Air
Dry Air
Warm Air

Answers

The answer is Warmer air

Answer:

Warm Air

Explanation:

please help!

- chlorophyll
-glucose
-ADP
-ATP

Answers

Answer:

ATP

Explanation:

What type of immune response would occur if bacteria invaded your lymph?

Answers

Explanation:

The lymphocytes would quickly gather around the infected area (lymph) to immediately destroy the bacteria.

Reactions occur within the sun to transform _____ energy into _______ energy.

Answers

Answer:

Chemical and light and thermal energy.

Explanation:

Reactions occur within the sun to transform chemical energy into light and thermal energy.

In the Sun, chemical energy transforms into light and thermal energy. Plants transform the Sun's light energy into chemical energy during the process of photosynthesis.

Hope this helps :)

Answer:

chemical and thermal energy

Which selection from the article "Scientists study Persian Gulf reefs for coral survival clues" identifies the biggest threat to coral reefs?

Question 5 options:

Warming waters spark bleaching events. Along with the bleaching, the ocean is becoming more acidic.


The researchers demonstrated that this new organism was the most commonly found algae throughout the gulf's coral reefs. They say it probably adapted as a result of the gulf's harsh conditions.

Answers

Warm and acidic water leads to bleaching of coral reef and the new algae can survive due to mutation in its gene.

The biggest threat to coral reefs in the Persian gulf is the warming of waters due to climatic change as well as acidification of water. Algae present on coral reefs can't tolerate acidic water as well as warm water which leads to the death of algae and the coral looks white or colorless.

A new organism was the most commonly found algae throughout the gulf's coral reefs due to change in the genetic makeup due to harsh climatic conditions so we can conclude that warm and acidic water leads to bleaching of coral reef and the new algae can survive due to mutation in its gene.

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How might the interdependence of organisms in a specific habitat be
helped or harmed as a result of changes in the ecosystem over time?

Answers

Changes in an ecosystem may benefit one organism by removing predators while affecting the predator species negatively.

What is the effect of change in ecosystem over time on the interdependence of organisms in a specific habitat?

Changes that occur in an ecosystem may occur as a result of natural or man-made causes.

Changes in an ecosystem may have positive or negative effects on the interdependence of organisms in a specific habitat.

For example in an aquatic habitat where certain species of fishes like sharks depends on smaller fishes like salmon to survive, if humans were to reduce the salmon population by overfishing, the sharks will be negatively affected as they may have to migrate to new hunting grounds.

However, some other fishes that are prey to shark may be able to grow more with the reduction on shark population in that area.

Therefore, changes in an ecosystem may benefit one organism by removing predators while affecting the predator species negatively.

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how do amphibians breathe on land and in water​

Answers

Answer:

Most amphibians can breathe both through cutaneous respiration (through their skin) and buccal pumping - though some also retain gills as adults. Some aquatic salamanders (and all tadpoles) have gills and can breathe underwater thanks to them. The Mexican axolotl, for example, never loses its gills.

the cell that is infected by a virus is called

Answers

Answer:

Via cytotoxic cells. When a virus infects a person (host), it invades the cells of its host in order to survive and replicate. Once inside, the cells of the immune system cannot 'see' the virus and therefore do not know that the host cell is infected.

Explanation:

I need help question 14

Answers

Answer:ok

Explanation:

What kinda of polymer is in the image below?

Answers

Answer:

polypeptide

Explanation:

Its the answer.

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