GATE BT topic:cell-biology PYQs & Answers — Page 2

Home
GATE
Biotechnology
Topics
topic:cell-biology

Questions 11–20 of 25. Imported answers require independent review unless marked reviewed.

Topic practice 25 questionsPage 2 of 3

Which of the following cell organelle(s) is/are surrounded by a single phospholipid membrane?

Your answerSelect all correct options. You can choose more than one.

Golgi apparatus

Lysosome

Mitochondria

Nucleus

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Ras protein is a

Your answerChoose one option.

trimeric GTPase involved in relaying signal from cell surface to nucleus.

monomeric GTPase involved in relaying signal from cell surface to nucleus.

trimeric GTPase involved in regulation of cytoskeleton.

monomeric GTPase involved in regulation of cytoskeleton.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Determine the correctness or otherwise of the following Assertion [a] and the Reason [r] regarding mammalian cells.

Assertion [a]: Cells use Ca²⁺, and not Na⁺, for cell-to-cell signaling

Reason [r]: In the cytosol, concentration of Na⁺ is lower than that of Ca²⁺

Your answerChoose one option.

Both [a] and [r] are true and [r] is the correct reason for [a].

Both [a] and [r] are true but [r] is not the correct reason for [a].

Both [a] and [r] are false.

[a] is true but [r] is false.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Which of the following statements are CORRECT about eukaryotic cell cycle?

[P] CDKs can phosphorylate proteins in the absence of cyclins

[Q] CDKs can be inactivated by phosphorylation

[R] Degradation of cyclins is required for cell cycle progression

[S] CDKs are not involved in chromosome condensation

Your answerChoose one option.

P and R only

P and S only

P, Q and R only

Q and R only

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match sub-cellular organelles listed in Group I with their features listed in Group II:

Group I	Group II
[P] Mitochondrion	1. Single-membrane enclosed
[Q] Chloroplast	2. Double-membrane enclosed
[R] Nucleus	3. Maternal inheritance
[S] Endoplasmic reticulum	4. Endosymbiotic origin

Your answerChoose one option.

P-1, Q-4, R-2, S-3

P-2, Q-3, R-4, S-1

P-3, Q-4, R-2, S-1

P-3, Q-1, R-4, S-2

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Assume that a cell culture was started with five human fibroblast cells. Two cells did not divide even once whereas the other three cells completed three rounds of cell division. At this stage, the total number of kinetochores in all the cells put together is ____________.

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

DNA synthesis in eukaryotes occurs during which phase of the mitotic cell cycle?

Your answerChoose one option.

G₁

G₀

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the organelles in Group I with their functions in Group II.

Group I P. Lysosome Q. Smooth ER R. Golgi apparatus S. Nucleolus

Group II

Digestion of foreign substances

Protein targeting

Lipid synthesis

Protein synthesis

rRNA synthesis

Your answerChoose one option.

P-1, Q-3, R-2, S-5

P-1, Q-4, R-5, S-3

P-2, Q-5, R-3, S-4

P-1, Q-3, R-4, S-5

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

If serum is removed from the growth medium of human embryonic kidney cell line (HEK), then the cells will

Your answerChoose one option.

proliferate faster

proliferate normally

undergo cell cycle arrest

undergo immediate apoptosis

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Cell type A secretes molecule X into the culture medium. Cell type B in the same culture responds to the molecule X by expressing protein Y. Which one of the following modes of signaling represents the interaction between A and B?

Your answerChoose one option.

Autocrine

Juxtacrine

Paracrine

Intracrine

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE BT topic:cell-biology PYQs

Question 19

Question 2

Question 5

Question 29

Question 38

Question 48

Question 6

Question 28

Question 2

Question 14