Intro To Cell Cycle Interphase

Given below is a schematic break-up of the phases/stages of cell cycle-

Which one of the following is the correct indication of the stage/phase in the cell cycle?

1.	B-Metaphase	2.	C-Karyokinesis
3.	D-Synthetic phase	4.	A-Cytokinesis

During cell growth, DNA synthesis takes place in:

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

When a cell has stalled DNA replication fork, which checkpoint should be predominantly activated?

Cells in ${\mathrm{G}}_0$ phase:
1. terminate the cell cycle
2. exit the cell cycle
3. enter the cell cycle
4. suspend the cell cycle

The correct sequence of phases in cell cycle is:

1. ${\mathrm{G}}_1\to \mathrm{S}\to {\mathrm{G}}_2\to \mathrm{M}$

2. $\mathrm{M}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}$

3. ${\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{S}\to \mathrm{M}$

4. $\mathrm{S}\to {\mathrm{G}}_1\to {\mathrm{G}}_2\to \mathrm{M}$

In a mitotic cycle, the correct sequence of phases is

1. S, ${\mathrm{G}}_1$, ${\mathrm{G}}_2$, M

2. ${\mathrm{G}}_1$, S, ${\mathrm{G}}_2$, M

3. M, ${\mathrm{G}}_1$, ${\mathrm{G}}_2$, S

4. ${\mathrm{G}}_1$, ${\mathrm{G}}_2$, S, M

Match the following events that occur in their respective phases of cell cycle and select the correct option:

	Column-I		Column-II
(a)	G1 phase	(i)	Cell grows and organelle duplication
(b)	S phase	(ii)	DNA replication and chromosome duplication
(c)	G2 phase	(iii)	Cytoplasmic growth
(d)	Metaphase in M-phase	(iv)	Alignment of chromosomes

Options:	(a)	(b)	(c)	(d)
1.	(ii)	(iii)	(iv)	(i)
2.	(iii)	(iv)	(i)	(ii)
3.	(iv)	(i)	(ii)	(iii)
4.	(i)	(ii)	(iii)	(iv)

Match List-I with List-II

	List-I		List-II
(a)	S phase	i.	Proteins are synthesized
(b)	G2 phase	ii.	Inactive phase
(c)	Quiescent stage	iii.	Interval between mitosis and initiation of DNA replication
(d)	G1 phase	iv.	DNA replication

Choose the correct answer from the options given below:

Options:	(a)	(b)	(c)	(d)
1.	iv	i	ii	iii
2.	ii	iv	iii	i
3.	iii	ii	i	iv
4.	iv	ii	iii	i

The centriole undergoes duplication during:

1.	Metaphase	2.	G2 phase
3.	S-phase	4.	Prophase

The fruit fly has 8 chromosomes (2n) in each cell. During the interphase of mitosis, if the number of chromosomes at G₁ phase is 8, what would be the number of chromosomes after the S phase?

1.	4	2.	32
3.	8	4.	16

Among eukaryotes, replication of DNA takes place in:

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

Match List I with List II:

	List I		List II
A.	M Phase	I.	Proteins are synthesized
B.	G2 Phase	II.	Inactive phase
C.	Quiescent stage	III.	Interval between mitosis and initiation of DNA replication
D.	G1 Phase	IV.	Equational division

Choose the correct answer from the options given below:

Options:	A	B	C	D
1.	II	IV	I	III
2.	III	II	IV	I
3.	IV	II	I	III
4.	IV	I	II	III

Given below are two-statements:

Statement I:	During G0 phase of cell cycle, the cell is metabolically inactive.
Statement II:	The centrosome undergoes duplication during S phase of interphase.

In the light of the above statements, choose the most appropriate answer from the options given below:

1.	Statement I is incorrect but Statement II is correct.
2.	Both Statement I and Statement II are correct.
3.	Both Statement I and Statement II are incorrect.
4.	Statement I is correct but Statement II is incorrect.

Following are the stages of cell division :

A.	Gap 2 phase
B.	Cytokinesis
C.	Synthesis phase
D.	Karyokinesis
E.	Gap I phase

Choose the correct sequence of stages from the options given below :
1. E-B-D-A-C
2. B-D-E-A-C
3. E-C-A-D-B
4. C-E-D-A-B