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
Montano1993 [528]
2 years ago
9

Refer to the Biochemistry in Focus section of your text for this chapter to answer this question. Sarin inhibits acetylcholinest

erase by covalently modifying the enzyme active site. Pyridostigmine is a competitive inhibitor of acetylcholinesterase and can serve as an antidote for sarin poisoning. How does pyridostigmine prevent sarin from inhibiting acetylcholinesterase?
a. Pyridostigmine binds to sarin and prevents it from binding to and modifying the enzyme active site.
b. Pyridostigmine increases the affinity of acetylcholinesterase for acetylcholine, thus preventing sarin from interacting with the enzyme active site
c. Pyridostigmine binds to the acetylcholinesterase active site and prevents sarin from binding to and modifying the enzyme active site.
d. Pyridostigmine reverses the covalent modification caused by sarin in the acetylcholinesterase active site.
Biology
1 answer:
DENIUS [597]2 years ago
8 0

Answer:

c. Pyridostigmine binds to the acetylcholinesterase active site and prevents sarin from binding to and modifying the enzyme active site.

Explanation:

Sarin is a toxic compound which inhibits acetylcholinesterase enzyme. This enzyme degrades the neurotransmitter acetylcholine after the required muscle cell stimulation. In absence of its activity, acetylcholine is not degraded and the muscle cells are stimulated uncontrollably. The muscles are not able to relax which ultimately proves fatal for the victim.

Pyridostigmine is also an acetylcholinesterase inhibitor like Sarin. However its period of inhibition is short compared to organophosphorus inhibitors like sarin. It competes with sarin and replaces it in the active site of acetylcholinesterase. The enzyme is still inhibited but for a shorter time as compared to inhibition by Sarin. Hence after sometime, it becomes functional again and resumes its normal activity. Acetycholine starts getting degraded relaxing the muscles.

You might be interested in
The osmotic balance between blood and interstitial fluid is maintained by plasma proteins called
MakcuM [25]
The osmotic balance between blood and interstitial fluid is maintained by plasma proteins called albumins.
3 0
3 years ago
Αи αєяο ρℓαиє ƒℓìєѕ ωìτн α ѕρєє∂ οƒ 720κмн. нοω ℓοиg ωìℓℓ ìτ τακє το τяανєℓ α ∂ìѕταиϲє οƒ 360 κìℓοмєτяєѕ?
AveGali [126]

Answer:

Given that,

Distance=360\:Kilometres

Speed = 720 KM/hr

time=360km/720kmh^{-1}

time=1/5 hr

Time = 30\: minutes \:or \:1/5 \:hours \: or \: 0.5 \:hours.

<u>OAmalOHopeO</u>

3 0
3 years ago
Read 2 more answers
This holds an organisms hereditary information.
Luba_88 [7]

Answer:

Deoxyribonucleic acid (DNA) hold the hereditary material that acts as a blueprint for the development and functioning of life process on the earth. It is a blueprint for every cell in every organism.

Its major function is to encode the DNA sequence of amino acid by using the triplet genetic code that code for a specific protein that perform a specific function in the body that are necessary for the normal function of the life processes.







4 0
3 years ago
Read 2 more answers
Why is it beneficial for an organism to have its tissues near its optimal temperature? List various functions or activities that
kykrilka [37]

Explanation:

Why is it beneficial for an organism to have its tissues near its optimal temperature? List various functions or activities that may be affected if the body temperature deviates too far from the temperature optimum (which functions or activities are mediated by proteins)?

a.) Muscle-movements

b.) Digestion of food

c.) Growth and development

Just about every aspect of an organisms daily functions are governed by the actions of proteins, be they structural proteins that determine cell shape, motor-protein that move vesicles inside the cell or allow muscle cells to contract, or be they enzymes that catalyze the vast majority of chemical reactions a cell has to engage in.

It turns out that every living organism gives off some heat. The difference between endotherms and ectotherms is merely the rate at which this heat is produced by the organism.

In fact, even plants and bacteria produce some heat as they go through their daily lives. This is evident in early spring, when the earliest spring flowers manage to thaw themselves through a solid ice layer, or when you overturn a compost heap on a crisp fall day in which bacteria decomposers are very active you will see steam rising from the pile.

What source have we already discussed that can produce this heat given off by organisms to their environment?

a) negative delta G of energetically coupled reactions.

Endotherms take advantage in particular of cellular respiration to ramp up that heat given off from energetically coupled reactions due to the Second Law of Thermodynamics.

As a consequence, endotherms maintain highly elevated rates of cellular respiration compared to ectotherms

b.) lowering of activation energy by an organism's enzymes

6 0
3 years ago
I need help.
Hoochie [10]
It’s symmetrical if it’s equal on both sides?
8 0
3 years ago
Read 2 more answers
Other questions:
  • Which statements below is NOT TRUE based upon the information in the phylogenetic tree?
    9·1 answer
  • Name the two general categories that the study of science can be divided into
    7·1 answer
  • Explain this statement: The energy for all the organisms in a food web can be traced back to the Sun.
    13·1 answer
  • Genes are important in determining what you look like. what else plays an important role?
    15·2 answers
  • . Which of the following is NOT a soil texture? A. Sand B. Clay C. Smooth D. Silt​
    8·2 answers
  • How can dna be used to help solve a crime
    13·2 answers
  • What is the current theory about the formation of the solar system?
    14·1 answer
  • How might genetic drift be important in managing an endangered species?
    12·1 answer
  • When people have heartburn, they often take an antacid like Milk of Magnesia to help them feel better.
    14·1 answer
  • Which statement is correct?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!