Cell Signalling and Transduction MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Cell Signalling and Transduction, 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 Cell Signalling and Transduction 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 Cell Signalling and Transduction mcq questions that explore various aspects of Cell Signalling and Transduction problems. Each MCQ is crafted to challenge your understanding of Cell Signalling and Transduction 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 Cell Signalling and Transduction 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 Cell Signalling and Transduction. 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 Cell Signalling and Transduction knowledge to the test? Let's get started with our carefully curated MCQs!

Cell Signalling and Transduction MCQs | Page 4 of 6

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Q31.
What is the name of the protein signaling molecule that alters glucose uptake, and where would its receptors be located?

a.

Insulin; many different cell types that use glucose for fuel

b.

Insulin; beta cells of the pancreas

c.

PDGF; the blood

d.

NGF; the nerves involved in simple reflexes

Discuss
Answer: (a).Insulin; many different cell types that use glucose for fuel
Q32.
In the signal transduction mechanism known as protein phosphorylation

a.

the signaling molecule binds to a surface receptor

b.

receptor kinases play a key role in triggering the signal cascade

c.

phosphorylated proteins act with enzymes to trigger the signal cascade

d.

All of the above

Discuss
Answer: (d).All of the above
Q33.
Cell signaling can be classified into

a.

three distinct types based on the distance over which the signaling molecules act

b.

two distinct types based on the distance over which the signaling molecules act

c.

three distinct types based on the signaling molecules

d.

none of the above

Discuss
Answer: (a).three distinct types based on the distance over which the signaling molecules act
Q34.
Which of the following statement is correct?

a.

Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones

b.

Cell communicate with one another in unicellular organisms using extracellular signaling antigen and antibody

c.

Cell communicate with one another in multicellular organisms using intracellular signaling molecules only

d.

Cell communicate with one another in unicellular organisms using intracellular signaling antigen and antibody

Discuss
Answer: (a).Cell communicate with one another in multicellular organisms using extracellular signaling molecules or hormones
Q35.
In vasodilation, proper nerve signals sent to blood vessels cause

a.

the release of nitric oxide from endothelial cells

b.

relaxation of smooth muscle cells

c.

reduced blood pressure

d.

All of the above

Discuss
Answer: (d).All of the above
Q36.
A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?

a.

It is in the heart muscle

b.

It is also the site of production for the signaling molecule

c.

It contains the receptor for the signaling molecule

d.

It is incapable of signal transduction

Discuss
Answer: (c).It contains the receptor for the signaling molecule
Q37.
The enzyme that catalyzes the splitting of PIP2 into two molecules of inositol triphosphate (IP3) and diacylglycerol in cell signaling, is

a.

phosphokinase C

b.

phospholipase C

c.

phosphodiesterase C

d.

lipokinase

Discuss
Answer: (b).phospholipase C
Q38.
The binding of ligands to many G-proteins linked receptors leads to shortlived

a.

increase in the concentration of certain intracellular signaling molecules called second messenger

b.

decrease in the concentration of certain intracellular signaling molecules called second messenger

c.

increase in the concentration of certain extracellular signaling molecules called first messenger

d.

decrease in the concentration of certain extracellular signaling molecules called first messenger

Discuss
Answer: (a).increase in the concentration of certain intracellular signaling molecules called second messenger
Q39.
Which of the following processes involve the combining of a message from one signaling molecule with that of another to either enhance or inhibit a cellular effect?

a.

Signal transduction

b.

Signal reception

c.

Signal integration

d.

Signal amplification

Discuss
Answer: (c).Signal integration
Q40.
A signal cascade induced by adrenaline or thyroxine

a.

must begin with receipt of the signal molecule by a surface receptor

b.

involves the activation of a G protein

c.

results in the activation of a sequence of enzymes needed for the cell effect

d.

all of the above

Discuss
Answer: (d).all of the above
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