Biosignalling MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Biosignalling, a fundamental topic in the field of Biochemistry. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Biosignalling MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Biosignalling mcq questions that explore various aspects of Biosignalling problems. Each MCQ is crafted to challenge your understanding of Biosignalling principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Biochemistry tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Biosignalling MCQs are your pathway to success in mastering this essential Biochemistry topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Biosignalling. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Biosignalling knowledge to the test? Let's get started with our carefully curated MCQs!

Biosignalling MCQs | Page 7 of 11

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Q61.
Which out of the following statements is true about G-protein couple receptors?

a.

The N-terminal chain is extracellular and C-terminal chain is intracellular

b.

It contains 5 trans-membrane hydrophobic sections

c.

There are more extracellular loops than intracellular loops

d.

The binding region for G-protein involves 2 extracellular loops

Discuss
Answer: (a).The N-terminal chain is extracellular and C-terminal chain is intracellular
Q62.
Which of the following is not a G-protein coupled receptor?

a.

Glycine receptor

b.

Adrenergic receptor

c.

Glutamate receptor

d.

Muscarinic receptor

Discuss
Answer: (a).Glycine receptor
Q63.
Protein kinase A is ____________

a.

Completely inhibited by cyclic AMP

b.

Allosterically activated by cyclic AMP

c.

Affected by cyclic AMP only under unusual circumstances

d.

Activated by covalent binding of cyclic AMP

Discuss
Answer: (b).Allosterically activated by cyclic AMP
Q64.
Which out of the following is not involved in signal transduction by β-adrenergic receptor pathway?

a.

GTP

b.

ATP

c.

cAMP

d.

cGMP

Discuss
Answer: (c).cAMP
Q65.
Which of the following catalyzes the cutting of PIP2 into 2 moles of IP3 and diacylglycerol in cell signaling?

a.

Phosphokinase C

b.

Phospholipase C

c.

Lipokinase

d.

Phosphodiesterase C

Discuss
Answer: (b).Phospholipase C
Q66.
The binding of ligands to many GPCRs leads to ___________

a.

Decrease in concentration of certain intracellular signal molecules called second messengers

b.

Increase in concentration of certain intracellular signal molecules called second messengers

c.

Decrease in concentration of certain extracellular signal molecules called first messengers

d.

Increase in concentration of certain extracellular signal molecules called first messengers

Discuss
Answer: (a).Decrease in concentration of certain intracellular signal molecules called second messengers
Q67.
A hormone or ligand can be considered as ___________

a.

First messenger

b.

Second messenger

c.

Third messenger

d.

Fourth messenger

Discuss
Answer: (a).First messenger
Q68.
Which of the following serves as a neurotransmitter in adrenergic neurons?

a.

Serotonin

b.

Epinephrine

c.

Dopamine

d.

Histamine

Discuss
Answer: (b).Epinephrine
Q69.
Which second messenger signals the release of Ca⁺² from endoplasmic reticulum?

a.

IP₃

b.

1, 2 diacyl glycerol

c.

cAMP

d.

cGMP

Discuss
Answer: (a).IP₃
Q70.
GPCR is comprised of ___________

a.

7 transmembrane helices

b.

8 transmembrane helices

c.

9 transmembrane helices

d.

10 transmembrane helices

Discuss
Answer: (a).7 transmembrane helices
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