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 5 of 11

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Q41.
Oncogenes do not encode for ___________

a.

Trans-membrane protein receptors

b.

Growth factors

c.

DNA-dependent RNA polymerase

d.

Cytoplasmic G-proteins and protein kinases

Discuss
Answer: (c).DNA-dependent RNA polymerase
Q42.
Programmed cell death is termed as ___________

a.

Metastasis

b.

Apoptosis

c.

Proliferation

d.

Mitotic termination

Discuss
Answer: (b).Apoptosis
Q43.
Which of the following could be coded by a tumor-supressor gene?

a.

A protein that helps prevent progression through cell cycle

b.

A protein that helps prevent apoptosis

c.

A protein that codes for a DNA repair enzyme

d.

A protein that forms part of a growth factor signaling pathway

Discuss
Answer: (a).A protein that helps prevent progression through cell cycle
Q44.
How does Ras oncogene contribute to cancers?

a.

It codes for an anti-apoptotic protein, produced in abnormally large amounts

b.

It codes for a GTPase switch protein, which in its mutated form cannot be switched off

c.

It codes for a transcription factor produced abnormally in large amounts

d.

A growth factor that is continually active is encoded in its truncated form

Discuss
Answer: (b).It codes for a GTPase switch protein, which in its mutated form cannot be switched off
Q45.
Which property of p53 enables it to prevent the development of cancer?

a.

It is a transcription factor that causes protein production which stimulates the cell cycle

b.

It prevents replication of cells with damaged DNA

c.

It prevents cells from triggering apoptosis

d.

It stimulates synthesis of DNA repair enzymes that replace telomere sequence lost during cell division

Discuss
Answer: (b).It prevents replication of cells with damaged DNA
Q46.
The characteristic of malignant other than a benign tumor is?

a.

Undergoes metastasis

b.

Develops blood supply

c.

Cell divides an unlimited number of times

d.

Grows without needing a growth signal

Discuss
Answer: (a).Undergoes metastasis
Q47.
The mutation which cannot give rise to an oncogene?

a.

Addition or deletion of a base producing a nonsense message and an inactive protein product

b.

A point mutation changing just one amino acid in protein product

c.

A translocation, putting gene under control of strong promoter producing over expression

d.

A point mutation producing stop codon, premature termination

Discuss
Answer: (a).Addition or deletion of a base producing a nonsense message and an inactive protein product
Q48.
Which out of the following is not a neurotransmitter?

a.

Noadrenaline

b.

Cyclic AMP

c.

Dopamine

d.

Acetyl choline

Discuss
Answer: (b).Cyclic AMP
Q49.
SH₂ domain specifically binds to _____________

a.

GDP

b.

Ca⁺²

c.

Phosphorylated tyrosine residues

d.

Phosphorylated serine residues

Discuss
Answer: (c).Phosphorylated tyrosine residues
Q50.
cAMP and cGMP are derived from ____________

a.

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

b.

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

c.

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

d.

None of the mentioned

Discuss
Answer: (b).ATP and GTP by the actions of adenylate cyclase and gualnlate cyclase respectively
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