R4RIN – MCQs, Mock Tests | Zoology Zoology MCQS[NEET-2021 to 2022]-Cell cycle

Which of the following from a blood clot stimulates the growth of cells in the healing process?

1. EGF
2. PDGF
3. MPF
4. NGF

✅ Correct Answer: 2

The spindle forms in the

1. G1 phase
2. G2 phase
3. M phase
4. S phase

✅ Correct Answer: 3

Which phase of mitosis is associated with chromosomes aligned at the center of the cell and centromeres divide?

1. anaphase
2. interphase
3. metaphase
4. prophase

✅ Correct Answer: 3

The event(s) which does not occur during interphase, is/are

1. Chromatin condenses
2. Protein Synthesis
3. Organelles replication
4. DNA replication

✅ Correct Answer: 1

In prokaryotes, just before the cell divides, the two daughter genomes are attached side by side to the

1. cell membrane
2. replication origin
3. centromeres
4. equatorial plate

✅ Correct Answer: 1

In the cell cycle replication of the genome occurs in the

1. G1 phase
2. G2 phase
3. M phase
4. S phase

✅ Correct Answer: 4

At which of the following check point, mitosis is controlled?

1. G1
2. G2
3. M
4. S

✅ Correct Answer: 2

The centromeres move toward the poles in __________ .

1. anaphase
2. interphase
3. metaphase
4. prophase

✅ Correct Answer: 1

Which phase of mitosis is associated with separation of chromatids?

1. Prophase
2. Metaphase
3. Anaphase
4. Telophase

✅ Correct Answer: 3

Sequences that correctly describes the cell cycle is

1. -> G1-> G2 -> S -> mitosis -> cytokinesis ->
2. -> S -> G2 -> mitosis -> cytokinesis -> G1 ->
3. -> G1 ->S -> G2 -> cytokinesis -> mitosis ->
4. ->cytokinesis-> mitosis -> G1 -> S -> G2 ->

✅ Correct Answer: 2

Which of the following triggers the division of activated T lymphocytes?

1. FGF
2. Interlukin 2
3. PDGF
4. Erythroprotein

✅ Correct Answer: 2

The term, not related to mitosis is

1. gametes
2. chromosomes
3. DNA replication
4. somatic cells

✅ Correct Answer: 1

What structure forms as a network of protein cables during cell division?

1. Spindle
2. Aster
3. Kinetochore
4. Chromatid

✅ Correct Answer: 1

A centromere is

1. another name for kinetochore
2. the structure to which microtubules attach
3. a constriction on a chromosome bound to a disk
4. all of the above

✅ Correct Answer: 4

Which of the following statements about mitosis is incorrect?

1. The daughter nuclei are genetically identical to the parent nucleus
2. Chromosomes separate during anaphase due to the interaction of polar microtubules from opposite poles pushing against each other
3. Chromosomes separate during anaphase when the kinetochore microtubules shorten as they depolymerize
4. Chromosomes move to the metaphase plate using motor proteins, a kind of kinesin, attached to spindle fibers

✅ Correct Answer: 2

Cdks bind with __________ , enabling the Cdks to function as enzymes.

1. MPF
2. cyclins
3. histones
4. p53

✅ Correct Answer: 2

Which of the following is not a part of a human chromosome in any phase?

1. Centriole
2. Histone
3. Nucleosome
4. Centromere

✅ Correct Answer: 1

During which phase, a cleavage furrow is formed in animal cells?

1. C
2. G1
3. G2
4. M

✅ Correct Answer: 1

In which phase, each chromosome replicates to produce two sister chromatids?

1. Anaphase
2. Interphase
3. Metaphase
4. Prophase

✅ Correct Answer: 2

Microtubules grow from the poles to kinetochores of each chromatid during

1. prophase
2. metaphase
3. anaphase
4. telophase

✅ Correct Answer: 1

Which of the following is the normal cell cycle, primarily regulated at checkpoints?

1. Metaphase in mitosis
2. Anaphase, G1 boundary
3. G1-S boundary
4. S-G2 boundary

✅ Correct Answer: 3

The phase of mitosis which is associated with the formation of the nuclear envelope, is

1. prophase
2. metaphase
3. anaphase
4. telophase

✅ Correct Answer: 4

At the __________ checkpoint, cell growth is controlled.

1. C
2. G1
3. G2
4. S

✅ Correct Answer: 2

A nuclear envelope forms around each set of sister chromatids in

1. anaphase
2. metaphase
3. prophase
4. telophase

✅ Correct Answer: 4

In which of the following phase preparations for genome separation are made?

1. C
2. G1
3. G2
4. M

✅ Correct Answer: 4

Cells which no longer divide (such as certain specialized cells found in the human brain) remain in which phase of the cell cycle?

1. Prophase
2. S phase
3. G0 Phase
4. Gl Phase

✅ Correct Answer: 3

The cell cycle is controlled in most cells by

1. time (after a certain length of time the cell divides)
2. a series of checkpoints
3. cell size (when the cell reaches a certain size, it divides)
4. different cells exhibit different control strategies

✅ Correct Answer: 4

How many chromatids does a diploid body cell contain just prior to cell division?

1. 23
2. 46
3. 62
4. 92

✅ Correct Answer: 4

DNA replication is controlled at which of the following checkpoint?

1. G1
2. G2
3. M
4. S

✅ Correct Answer: 1

Which of the following begins when pairs of sister chromatids align in the center of the cell?

1. Anaphase
2. Interphase
3. Metaphase
4. Prophase

✅ Correct Answer: 3

How many chromatids are there in a duplicated chromosome?

1. One
2. Two
3. Three
4. Four

✅ Correct Answer: 4

The term homologous chromosomes

1. refers to replications of the same chromosome
2. is another name for sister chromatids
3. must be haploid
4. means a pair of chromosomes of the same kind, such as sex chromosomes

✅ Correct Answer: 4

At the center of the cell cycle control system is Cdk, a protein that

1. is phosphorylated to become active
2. binds to different cyclins
3. is only active during mitosis
4. manufactures growth factors

✅ Correct Answer: 2

Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.

1. C
2. G2
3. M
4. S

✅ Correct Answer: 4

Which of the following is the primary growth phase of a cell?

1. G1
2. G2
3. M
4. G0

✅ Correct Answer: 1

The G0 phase is

1. a permanent state of all body cells
2. the state of most cells in an animal body
3. another name for interphase
4. all of the above

✅ Correct Answer: 2