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 6 of 11

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Q51.
Which of the following is false about phosphorylation by IRS on serine residue?

a.

It is an inhibitory phosphorylation

b.

It is molecular mechanism for insulin resistance

c.

It increases insulin levels

d.

Target tissues fail to respond to circulating insulin

Discuss
Answer: (c).It increases insulin levels
Q52.
The enzyme activated by cyclic AMP, passing on the hormonal signal is ____________

a.

Protein kinase B

b.

Protein kinase A

c.

Protein kinase C

d.

G protein receptor kinase

Discuss
Answer: (b).Protein kinase A
Q53.
Protein kinase ERK is activated by phosphorylation of ____________

a.

Only Thr

b.

Only Tyr

c.

Both Thr and Tyr

d.

Only Ser

Discuss
Answer: (c).Both Thr and Tyr
Q54.
Activation of guanylyl cyclase produces ____________

a.

Guanosine 3’, 5’-cyclic monophosphate

b.

Guanosine 2’, 5’-cyclic monophosphate

c.

Guanosine 4’, 5’-cyclic monophosphate

d.

Guanosine 1’, 5’-cyclic monophosphate

Discuss
Answer: (a).Guanosine 3’, 5’-cyclic monophosphate
Q55.
cGMP-dependent protein kinase is also called ____________

a.

Protein kinase B

b.

Protein kinase A

c.

Protein kinase G

d.

Protein kinase C

Discuss
Answer: (c).Protein kinase G
Q56.
Which of the following is not responsible of producing diarrhea?

a.

Elevation in [cGMP]

b.

Increase in Cl⁻ secretion

c.

Decrease in reabsorption of water by the intestinal epithelium

d.

Decrease in Cl⁻ secretion

Discuss
Answer: (d).Decrease in Cl⁻ secretion
Q57.
Which of the following is a short-lived messenger that acts by stimulating a soluble guanylyl cyclase, raising [cGMP] and stimulating PKG?

a.

NO

b.

NO₂

c.

NO₃⁻

d.

N₂O

Discuss
Answer: (a).NO
Q58.
Ras protein is a ____________

a.

G-protein switch

b.

Small monomeric GTPase switch protein

c.

Serine-threonine kinase

d.

Tyrosine kinase

Discuss
Answer: (b).Small monomeric GTPase switch protein
Q59.
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
Q60.
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
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