Prophase

Q.

Kinetochore refers to

1. Centriole

2. Centromere

3. Cell centre

4. All of these

Q. During $G_1$ phase, cells

1. synthesize cellular contents
2. grow
3. all of the above
4. do not divide

Q. First gap phase in cell cycle is

1. before DNA replication
2. after karyokinesis
3. after duplication of centrioles
4. after DNA replication

Q. Which phase of mitosis is observed after G${}_2$ phase?

1. $G_1$ phase
2. Prophase
3. Interphase
4. Metaphase

Q. Assertion: Mitosis is known as equational division and meiosis is known as reduction division.
Reason: During meiosis, the non-sister chromatids of homologous chromosomes cross-over and exchange genetic information. This step does not occur during mitosis.

1. Both the assertion and reason are true and the reason is the correct explanation of the assertion
2. The assertion is false but the reason is true
3. The assertion is true but the reason is false
4. Both the assertion and reason are true but the reason is not the correct explanation for the assertion

Q.

Give the specific function of the following structure found in the body of plants or animals:

(i) Centrosome

Q.

At the end of prophase, the chromosome exhibit

1. A single centromere each

2. Two chromatids each

3. Irregularly scattered positions

4. All of these

Q. Which phase of the cell cycle is called the pre-mitotic phase?

1. $G_2$ phase
2. $G_1$ phase
3. M phase
4. S phase

Q.

In cell division, proteins are involved in the formation of

1. asters

2. All of these

3. spindle fibres

4. achromatic figure

Q.

Which phase is of the longest duration in meiosis?

1. Prophase-II

2. Anaphase-I

3. Prophase-I

4. Metaphase-I

Q. Which phase of mitosis is observed after G${}_2$ phase?

1. $G_1$ phase
2. Interphase
3. Metaphase
4. Prophase

Q.

how anaphase of mitosis differ from anaphase I of meiosis

Q. Label the parts of the cell in prophase.

1. Nuclear membrane
2. Chromosome
3. Aster

Q. Which among the following statements are incorrect?
I. In an aster, the microtubular astral rays are connected to centrioles.
II. Cytokinesis follows immediately after mitosis and meiosis I.

1. I only
2. II only
3. Both I & II
4. Neither I nor II

Q. Which of the following is not a phase of mitosis?

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

Q.

Describethe events taking place during interphase.

Q.

When do centrioles split and go to the poles of the cell?

1. During Anaphase

2. Beginning of Prophase

3. End of Prophase

4. Beginning of Metaphase

Q. If there are 10 chromosomes present in the cell cycle of an haploid cell then how many chromatids are present in the anaphase of mitotic division

Q.

In cell division, proteins are involved in the formation of:

1. Spindle fibres

2. Achromatic figure

3. Asters

4. All of these