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 3 of 6

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Q21.
Which of the following cell organelles are expected to be associated with motor proteins?

a.

Smooth ER

b.

Vesicles

c.

Plasma membrane

d.

Chloroplasts

Discuss
Answer: (b).Vesicles
Q22.
Eukaryotic cells are more efficient than prokaryotes because their internal compartmentalization

a.

makes each compartment nutritionally independent of all others

b.

allows for specialization through the subdivision of particular tasks

c.

allows for specialization through merging of different tasks

d.

reduces overall cell size

Discuss
Answer: (b).allows for specialization through the subdivision of particular tasks
Q23.
An organism's first line of defense against attack by an invader such as a virus or bacterium is usually

a.

to flee or hide

b.

its body wall

c.

a specific immune response

d.

a nonspecific immune response

Discuss
Answer: (b).its body wall
Q24.
The major second messengers are

a.

cAMP

b.

cGMP

c.

DAG

d.

All of these

Discuss
Answer: (d).All of these
Q25.
The signaling molecules called steroid hormones

a.

are made in one location of the body but have their effects some distance away

b.

are hydrophilic and so cannot penetrate the plasma membrane

c.

bind to cell surface receptors to trigger chemical cascades

d.

never enter the blood of humans

Discuss
Answer: (a).are made in one location of the body but have their effects some distance away
Q26.
Which of the following is true about a hydrophilic signaling molecule?

a.

Its receptor is located in the cytosol of the target cell

b.

It might trigger a signal cascade that causes some effect in a cell

c.

Since it can enter the cell, it directly affects some specific cell process

d.

It is a steroid

Discuss
Answer: (b).It might trigger a signal cascade that causes some effect in a cell
Q27.
cAMP and cGMP are derived from

a.

ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively

b.

GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively

c.

ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively

d.

none of the above

Discuss
Answer: (a).ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively
Q28.
Nitroglycerin has long been administered to human patients suffering from chronic chest pain (angina). This medication works because it

a.

mimics the action of signal receptors

b.

is broken down into hormones that affect the heart

c.

interferes with chemical cascades that trigger contraction of heart muscle

d.

breaks down into nitric oxide, which increases blood flow to the heart

Discuss
Answer: (d).breaks down into nitric oxide, which increases blood flow to the heart
Q29.
If a disease of the blood vessels caused the endothelial cells of the vessel to die, what effect would that have on the cellular activities associated with vasodilation?

a.

Nitric oxide would no longer be produced

b.

Smooth muscle cells could not be made to relax

c.

It would be more difficult to increase blood flow and reduce blood pressure

d.

All of the above

Discuss
Answer: (d).All of the above
Q30.
In terms of cell communication, what do bacterial pathogens such as cholera and anthrax have in common?

a.

They destroy the receptors for key signaling molecules

b.

They prevent the production of key signaling molecules

c.

They alter the chemical structure of key signaling molecules

d.

They block the normal functioning of signal transduction mechanisms

Discuss
Answer: (d).They block the normal functioning of signal transduction mechanisms
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