Which of the following cells usually do not undergo cell division?

1

(a)

Cells of skin

(b)

Cells of buccal cavity

(c)

Cells of heart

(d)

All of these

During which stage the cell organelles reappear in cell division?

1

(a)

Prophase

(b)

Metaphase

(c)

Anaphase

(d)

Telophase

Which of the following is the longest stage during meiosis?

1

(a)

Prophase I

(b)

Prophase II

(c)

Metaphase I

(d)

Metaphase II

During which stage of meiosis the recombination of genes takes place?

1

(a)

Prophase I

(b)

Prophase II

(c)

Metaphase I

(d)

Metaphase II

Which of the following enzymes is responsible for recombination of genes?

1

(a)

Ribonuclease

(b)

Recombinase

(c)

Kinetase

(d)

Laptotase

Name a drug that has an inhibitory effect on cell cycle in mitotic stage.

1

(a)

Colchicine drug shows inhibitory effect.

Give the name of the phase between the two successive mitotic cell divisions.

1

(a)

Interphase is the period between the two successive mitotic cell divisions.

What indicates on the beginning of diplotene stage of prophase-I?

1

(a)

On the beginning of diplotene stage, synaptonemal complex dissolutes and recombined homologous chromosomes separate from each other.

What is kinetochore?

1

(a)

Kinetochores are disc-shaped structures on chromosomes, which help in the attachment of spindle fibres.

Which stage of meiotic division last for years in some vertebrates. Explain some features of this stage.

1

(a)

Diplotene of meiosis

What is the term given to multinucleated condition? Explain briefly.

3

(a)

Describe the following - bivalent

3

(a)

What is the number of chromosomes in the seed of dicotyledon?

3

(a)

Division of cytoplasm takes place during which stage?

3

(a)

What is the main role of mitosis?

3

(a)

What happens when a normal cell turns into a malignant cell?

3

(a)

Describe cell division. List various types of cell division. Also mention about the need of cell division?

3

(a)

State the role of centrioles in cell division.

3

(a)

(i) Name the stages and type of cell division represented in A and B, repectively.

(ii) Also explain any one of them.

3

(a)

List the main differences between mitosis and meiosis.

3

(a)

Describe briefly the phases of meiotic cell division.

5

(a)

Give diagrammatic representation of the meiotic cell division

5

(a)