1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Fantom [35]
3 years ago
8

Bacteriorhodopsin pumps protons across the bacterial plasma membrane from the cytosolic side to the extracellular side of the me

mbrane in a series of steps. Choose the step that correctly describe a step used to pump protons across the membrane.A. A proton is transferred from excited retinal to the Asp96 side chain. B. The chromaphore retinal absorbs a photon of light, causing a double bond in retinal to isomerize from trans to cis configuration. C. A proton from Asp96 on the cytosolic side of the protein is used to regenerate retinal.D. A proton from the cytosol side is transferred along multiple water molecules to Asp85.
Biology
1 answer:
julsineya [31]3 years ago
7 0

Answer: Option B.

B. The chromaphore retinal absorbs a photon of light, causing a double bond in retinal to isomerize from trans to cis configuration.

Explanation:

Bacteriorhodopsin is a protein used by archaea or half bacteria that pumps proton across membrane by using the light energy from sun to move protons across membrane. It is found in purple membrane of archaea cells which is known as two dimensional crystalline patches.

It captures photon energy through chromophore retina which is covalently bound and transporting the photons against their electrochemical gradients from the cytoplasm to the extracellular space.

You might be interested in
Which of the following is a characteristic of vertebrates?
IRINA_888 [86]

It's actually A. Vertebrate have a hard out shell.

4 0
3 years ago
In a cross of AaBb x AaBb, what fraction of the offspring can be expected to express one of the two dominant alleles, but not bo
Zepler [3.9K]

Answer: 1/4 (4 out of 16 offsprings express one of the two dominant alleles)

Explanation:

The dominant alleles are A and B

At the end of the cross AaBb x AaBb, 16 offsprings would result. They are as follows: AABB, AABb, AaBB, AaBb

AABb, AAbb, AaBb, AABB,

AaBB, AaBb, aaBB, aaBb,

AaBb, Aabb, aaBb, aabb.

Of all, only 4 offsprings (aaBb, aaBB, AAbb, Aabb) expresses one of the A or B. so 4/16 = 1/4

6 0
3 years ago
Please helpppppp!!!!!
Marta_Voda [28]

Answer: if the trees and lakes were destroyed there would be no homes for most animals and they might become exctinct. Trees provide us paper and oxygen, store carbon, stabilise the soil and give life to the world's wildlife. They also provide us with the materials for tools and shelter.

Explanation:

8 0
2 years ago
All of the following are important properties of prokaryotes except
kenny6666 [7]

Answer: C) Prokaryotes convert nitrogen-containing molecules into forms that can't be used by other organisms.

Prokaryotes are the organisms that do not have a membrane bound nucleus, mitochondria and other organelle. They ranges in size of diameter from 0.1–5.0 µm.

Example:<em> Escherichia coli, Sulfolobus acidocaldarius archeobacterium </em>

Decomposers, play an important role in nitrogen cycle. Nitrogen gas is converted to nitrate compound by nitrogen fixing bacteria which are present in root nodules of leguminous plants.

Example: <em>Azotobacter </em>

8 0
2 years ago
Read 2 more answers
Farmers can reduce soil erosion by
skelet666 [1.2K]
Planting vegetation so the roots of the plants hold the soil together.
6 0
3 years ago
Read 2 more answers
Other questions:
  • Carbohydrates are to monosaccharides as proteins are to amino acids.
    13·1 answer
  • Select all that apply. Proteins _____. contain carbon, hydrogen, oxygen, and nitrogen. consist of amino acids are derived from f
    8·2 answers
  • Which animal would display a j-shaped curve for its rate of oxygen consumption relative to its speed? sockeye salmon ground squi
    14·2 answers
  • What is the role of pollen tube in spermopsida
    12·2 answers
  • What is the primary difficulty of organizing earth's biodiversity?
    10·1 answer
  • Please help<br> Explain Give two examples of how abiotic factors are influenced by biotic factors?
    5·1 answer
  • When oceanic and continental plates converge, the oceanic plate tends to go under the continental plate and eventually melts. Wh
    8·1 answer
  • What steps are usually included in the scientific method
    7·1 answer
  • Listed in the Item Bank are key terms and expressions, each of which is associated with one of the columns. Some terms may displ
    13·1 answer
  • Name the clear watery liquid that surrounds the brain and spinal cord and fills the four cavities or ventricles of the brain.
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!