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Zoology MCQS[NEET-2021 to 2022]-Cell cycle
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1. Which of the following from a blood clot stimulates the growth of cells in the healing process?
EGF
PDGF
MPF
NGF
2. The spindle forms in the
G1 phase
G2 phase
M phase
S phase
3. Which phase of mitosis is associated with chromosomes aligned at the center of the cell and centromeres divide?
anaphase
interphase
metaphase
prophase
4. The event(s) which does not occur during interphase, is/are
Chromatin condenses
Protein Synthesis
Organelles replication
DNA replication
5. In prokaryotes, just before the cell divides, the two daughter genomes are attached side by side to the
cell membrane
replication origin
centromeres
equatorial plate
6. In the cell cycle replication of the genome occurs in the
G1 phase
G2 phase
M phase
S phase
7. At which of the following check point, mitosis is controlled?
G1
G2
M
S
8. The centromeres move toward the poles in __________ .
anaphase
interphase
metaphase
prophase
9. Which phase of mitosis is associated with separation of chromatids?
Prophase
Metaphase
Anaphase
Telophase
10. Sequences that correctly describes the cell cycle is
-> G1-> G2 -> S -> mitosis -> cytokinesis ->
-> S -> G2 -> mitosis -> cytokinesis -> G1 ->
-> G1 ->S -> G2 -> cytokinesis -> mitosis ->
->cytokinesis-> mitosis -> G1 -> S -> G2 ->
11. Which of the following triggers the division of activated T lymphocytes?
FGF
Interlukin 2
PDGF
Erythroprotein
12. The term, not related to mitosis is
gametes
chromosomes
DNA replication
somatic cells
13. What structure forms as a network of protein cables during cell division?
Spindle
Aster
Kinetochore
Chromatid
14. A centromere is
another name for kinetochore
the structure to which microtubules attach
a constriction on a chromosome bound to a disk
all of the above
15. Which of the following statements about mitosis is incorrect?
The daughter nuclei are genetically identical to the parent nucleus
Chromosomes separate during anaphase due to the interaction of polar microtubules from opposite poles pushing against each other
Chromosomes separate during anaphase when the kinetochore microtubules shorten as they depolymerize
Chromosomes move to the metaphase plate using motor proteins, a kind of kinesin, attached to spindle fibers
16. Cdks bind with __________ , enabling the Cdks to function as enzymes.
MPF
cyclins
histones
p53
17. Which of the following is not a part of a human chromosome in any phase?
Centriole
Histone
Nucleosome
Centromere
18. During which phase, a cleavage furrow is formed in animal cells?
C
G1
G2
M
19. In which phase, each chromosome replicates to produce two sister chromatids?
Anaphase
Interphase
Metaphase
Prophase
20. Microtubules grow from the poles to kinetochores of each chromatid during
prophase
metaphase
anaphase
telophase
21. Which of the following is the normal cell cycle, primarily regulated at checkpoints?
Metaphase in mitosis
Anaphase, G1 boundary
G1-S boundary
S-G2 boundary
22. The phase of mitosis which is associated with the formation of the nuclear envelope, is
prophase
metaphase
anaphase
telophase
23. At the __________ checkpoint, cell growth is controlled.
C
G1
G2
S
24. A nuclear envelope forms around each set of sister chromatids in
anaphase
metaphase
prophase
telophase
25. In which of the following phase preparations for genome separation are made?
C
G1
G2
M
26. Cells which no longer divide (such as certain specialized cells found in the human brain) remain in which phase of the cell cycle?
Prophase
S phase
G0 Phase
Gl Phase
27. The cell cycle is controlled in most cells by
time (after a certain length of time the cell divides)
a series of checkpoints
cell size (when the cell reaches a certain size, it divides)
different cells exhibit different control strategies
28. How many chromatids does a diploid body cell contain just prior to cell division?
23
46
62
92
29. DNA replication is controlled at which of the following checkpoint?
G1
G2
M
S
30. Which of the following begins when pairs of sister chromatids align in the center of the cell?
Anaphase
Interphase
Metaphase
Prophase
31. How many chromatids are there in a duplicated chromosome?
One
Two
Three
Four
32. The term homologous chromosomes
refers to replications of the same chromosome
is another name for sister chromatids
must be haploid
means a pair of chromosomes of the same kind, such as sex chromosomes
33. At the center of the cell cycle control system is Cdk, a protein that
is phosphorylated to become active
binds to different cyclins
is only active during mitosis
manufactures growth factors
34. Each chromosome contains two chromatids by the end of the __________ phase in the life cycle of a human cell.
C
G2
M
S
35. Which of the following is the primary growth phase of a cell?
G1
G2
M
G0
36. The G0 phase is
a permanent state of all body cells
the state of most cells in an animal body
another name for interphase
all of the above
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