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

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.

Mutations may be caused by A. errors in replication B. exposure to radiation C. breakage of chromosomes D. All answer choices are correct

Answers

Answer: D all answer choices are correct

Chemicals that help chemical reactions occur faster rates in living organisms are known as

Answers

The called enzymes that sped up chemical reactions

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**

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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Into which part of the bacteria cell is the human gene for insulin inserted?

Answers

Answer:

plasmid

Explanation:

plasmid

The human insulin gene is inserted into each plasmid. The plasmid acts as a vector - it is used to transfer DNA from one organism to another. Bacterial cells are made to take up the genetically modified plasmids.

can some one help me with this please​

Answers

Answer:

1 answer is B

2 answer is c

3 answer is a

Explanation: hope this helps if it not right pls tell me

can someone heelp me plz

Answers

Answer:
Liter

Explanation

How is climate change being impacted?

Answers

More frequent and intense drought, storms, heat waves, rising sea levels, melting glaciers and warming oceans can directly harm animals, destroy the places they live, and wreak havoc on people's livelihoods and communities. As climate change worsens, dangerous weather events are becoming more frequent or severe.

Cellulose is a polysaccharide (carbohydrate) and is a basic structural
component that makes up plant cell walls. Decomposers, such as bacteria and
fungi, produce cellulase to quickly break down cellulose. Cellulase is a(n)
hansport protein
Struttura Proton
Hormone
Enzyme

Answers

Answer:

Enzymes

Explanation:

A family of hydrolytic enzymes known as cellulases is responsible for the cellulolysis or hydrolysis of the polysaccharide cellulose, which results in the formation of monosaccharides such as glucose and shorter polysaccharides and oligosaccharides. Because of their numerous applications, these enzymes have a significant economic impact on the world.

PLEASE HELP!! Identify and place the stages of mitosis in the chart.

Answers

Answer:

the nuclear envelope sentence goes to PROPHASE

The chromosomea align in sentence goes to METAPHASE

What term describes the total mass of trees, shrubs, herbaceous plants, and grasses present in a given forest on a given day

Answers

The term best describes the mass of the above-ground vegetation in a given forest would be the standing crop.

The standing crop of a forest specifically refers to the mass of all the living plant materials present in the forest at a particular time ranging from the biggest of trees, shrubs, herbs, to the tiniest of grasses.

Standing crop is as opposed to biomass in that the latter refers to the total mass of organic materials from the living and dead plants derivable from the forest.

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You are competing at a high school gymnastics meet. Your floor routine music begins
and you start running in a positive direction into a tumbling pass, starting from rest.
At 2s, your velocity is 4.5m/s. Calculate your acceleration.
Your Answer:
Answer
units

Answers

Answer:

2.25 m/s^2

Explanation:

Acceleration is the speed which you are increasing by per second. Therefore to find acceleration all you need to do is divide the change in velocity (4.5) by the time (2). Your units than become (m/s)/s or m/s^2.

Label the process in the carbon cycle

Answers

Answer:

Photosynthesis

Explanation:

uhmm i think

FIRST PERSON TO ANSWER THE QUESTION GETS BRAINLIEST A group of wolves is led by a male wolf and a female wolf. The two wolves lead the hunting and get to eat the captured prey first. They are the only wolves in the group who have pups. The other members of the group help to feed and care for the pups The group works together to stop other wolves from entering the area where they live.​

Answers

Answer

The other wolves act as though they are their "aunts" and " uncles". It helps them survive by making sure the 2 wolves that lead the pack don't have to work too hard and they all work together as a bug family.

Explanation:

The gallbladder provides ________ that aid(s) in transport of lipids across the intestinal membrane.

Answers

The gall bladder provides bile salt.

The gall bladder is a small pear-shaped organ that is located at the abdomen inferior to the liver.

This organ stores and releases the bile salt produced from the liver.

The bile salt is released through the bile duct into the duodenum of the small intestine.

The bile salt is use to emulsify fat thereby aiding it's transport across the intestinal membrane.

Therefore, the gall bladder provides bile salt that aids in transport of lipids across the intestinal membrane.

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Aldosterone ____________ ion exchange at the distal convoluted tubule. This helps to regulate the reabsorption of sodium and water

Answers

Aldosterone, the main mineralocorticoid steroid hormone ion exchange at the distal convoluted tubule.

This helps to regulate the reabsorption of sodium and water.

Discussion;

To prevent osmolarity from decreasing below normal, the kidneys also have a regulated mechanism for reabsorbing sodium in the distal nephron.

The mechanism in discuss is controlled by aldosterone, a steroid hormone produced by the adrenal cortex.

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ASAP Brainly, right here right now!
Examine the comparison between a eukaryotic cell and a prokaryotic cell. Which two lettered choices provide a comparison of structures that encode genetic information for the cells? A) A and D B) B and D C) C and D D) None of these choices, as prokaryotic cells do not contain DNA

I am almost certain it is A) a and d) but I need reassurance.

Answers

Answer: c & d

Explanation:

C and D provide a comparison of structures that encode genetic information for the cells. So, the correct option is C.

What are Prokaryotic and Eukaryotic cells?

Prokaryotic cells are single-celled microorganisms known to be the earliest on earth. Prokaryotes include Bacteria and Archaea. The photosynthetic prokaryotes include cyanobacteria that perform photosynthesis. A prokaryotic cell consists of a single membrane and therefore, all the reactions occur within the cytoplasm which can be free-living or parasites.

Eukaryotic cells are defined as having a nucleus enclosed within a nuclear membrane and form large and complex organelles. Protozoa, fungi, plants and animals all contain eukaryotic cells which are classified under the kingdom Eukaryota.

Thus, C and D provide a comparison of structures that encode genetic information for the cells. So, the correct option is C.

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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 bacteria are useful in converting milk into curd?
(A) Azotobacter
(B) E. Coli
(C) Lactobacilli
(D) Pseundomonas​

Answers

[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪  {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]

The correct Choice is ~ C

Lactobacillus bacteria are useful in converting milk into curd ~

Answer: (C) Lactobacilli

Brainliest pls if correct!

Explain why sickle cell anaemia is persistent in the tropics yet it is lethal and these areas have high malaria Providence.​

Answers

Sickle cell anemia is persistent in the tropics because those with sickle cell anemia cant contract the malaria virus because of the shape of their blood cells, and this is advantageous in the tropics where there are more malaria cases. So those with sickle cell anemia live to pass on their genes.

The sequence by which electrons travel downhill during aerobic respiration. The se sequence has NADH, oxygen chain of transportation of electron, food and NAD.

Answers

Respiration (both aerobic and anaerobic) begins with glycolysis in the cytoplasm of a cell;

1 glucose molecule (C₆H₁₂O₆) is converted into 2 molecules of pyruvate in a 10-step process, consuming 2 ATPs and yielding 4 ATPs;

Additionally, 2 NAD+ molecules are reduced to NADH molecules;

In aerobic respiration, each pyruvate molecule then goes through the link reaction, getting converted to acetyl co-A in the mitochondrial matrix, producing 1 CO₂ molecule and 1 reduced NADH molecule;

Acetyl co-A then enter the Krebs or tricarboxylic acid cycle (TCA) where 2 CO₂, 1 ATP, 3 NADH (by reduction of NAD+) and 1 FADH₂ molecules are produced;

The NADH and FADH₂ molecules produced are electron carriers required for the electron transport chain (ETC);

The electron transport chain consists of 4 proteins within the inner mitochondrial membrane which are involved in the production of ATP by oxidative phosphorylation;

The first protein (C1) is responsible for oxidising NADH to NAD+, releasing energy used to generate the proton motive force (PMF) by pumping the protons (H+ ions) into the intermembrane space and the electrons released are transferred to a ubiquinone molecule;

The second protein (C2) is responsible for oxidising FADH₂ to FADH, also releasing energy used to generate the proton motive force (PMF) and, similarly to C1, the electrons released are transferred to ubiquinone;

The third protein complex (C3) transfers the electrons from ubiquinone to cytochrome C;

Finally, cytochrome C transfers these electrons to the fourth complex (C4), where they combine with free protons in the matrix and O₂ to to produce H₂0;

The PMF is then harvested via an ATP synthase protein where H+ flood back into the mitochondrial matrix, and the energy released is used to generate ATP from ADP and Pi;

ATP is now ready for use for bodily processes requiring it.


Cells of the nervous system which supports the neurons by producing myelin sheaths and
attaching neurons to blood vessels are called:

Answers

Answer:

Schwann cells :)

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. :)

What can you infer about the position of the galaxies 100 million years
before this telescope photo was taken? How does this relate to the big bang
theory?

Answers

Although the picture for this question is not given, if we have the possibility to view galaxies from 100 million years ago and compare them to the photos we have today, we would see that their positions would be different.

Why would the position of the galaxies have changed?

This has to do with the fact that the universe is always expanding.

The idea of an expanding universe means that galaxies are moving farther away all the time.

However, due to the effects of gravity, some galaxies pull each other in and form groups or clusters.

Therefore, due to the formation of galaxy groups or clusters, the position of galaxies may have changed in relation to others from outside its groups in the last 100 million years, while remaining the same relative to other galaxies in its local group.

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Answer:

The positions have changed over time!

Explanation:

Because of this over time change I think it goes with evolution and big bang theory

The diagram below shows a certain method of grazing animals

Answers

Answer:

In agriculture, rotational grazing, as opposed to continuous grazing, describes many systems of pasturing, whereby livestock are moved to portions of the pasture, called paddocks, while the other portions rest.

Explanation:

hehe ....

Tundra has mostly mosses, lichens, and grasses. What abiotic factors prevent other vegetation from growing in this biome?

Hot summers and cool winters; low rainfall

Cold winters, high precipitation, and lack of trees

Permanently frozen soil and low precipitation

High precipitation and little seasonal change

Answers

Answer:

C

Explanation:

i did the test

Tundra is located on the artic zone. Therefore, permanently frozen soil and low precipitation is the reason of hindered plant growth.

What is a biome?

A biome is an ecological unit that depicts the occurrence of a biological community in response to the particular climate and the environment.

Biomes support variety of habitats across the different continents. Various biomes together constitute a biosphere.

A biome is identified on the basis of temperature and precipitation it receives annually. The presence or existence of organisms is dependent on these two factors.

Based on topography, biomes can be classified into terrestrial, fresh water and marine biomes.

Some of the well known examples of biomes include tundra region, taiga region, grasslands, desserts and forests.

There are also special types of biomes known as ecotones where the two biomes merge. Salt marshes are the example of ecotone.

Thus, biome is the life supporting unit in ecology.

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What protein is critical to the function of compact bones?

Answers

Collagen Fibers produce tough protein fibers that give bones flexibility and prevent shattering.
Collagen fibers is a critical function

What happens to the tides if the earth spinner fast??

Answers

Answer:

it would be a disaster

Explanation:

The centrifugal force would pull hundreds of feet of water toward the Earth's waistline.

Answer:

If the Earth were to spin faster, the tides would change because the fast speeds would increase stress; making tighter circles of convection. This would cause more natural disasters like hurricanes, cyclones, and tsunamis.

Explanation:

Hope this helps! BH

What kind of mixture can paint be classified as

Answers

Answer:

colloid

Explanation:

Answer:

the paint is a suspension paint is also a type of colloidal solution it is a 'solution in which the dispersed medium (the solvent) is liquid and dispersed phase is solid

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