Mitosis

Q.

How many mitotic divisions are needed for a single cell to make 128 cells?

1. 7
2. 14
3. 28
4. 6

Q.

The number of mitotic cell divisions required to produce 256 cells from a single cell would be

1. 10

2. 12

3. 6

4. 8

Q.

What are the three functions of all cells?

Q. Mitosis results in

1. reduction of chromosome number in daughter cells
2. doubling of chromosome number in daughter cells
3. daughter cells with same chromosome number as the parent cell
4. increase in cell volume

Q. In mitosis, a single cell divides into two identical daughter cells.

1. True
2. False

Q.

In plants, for the formation of pollen grain and ovules, would mitosis or meiosis occur?

1. Mitosis

2. Meiosis

Q.

Mitosis occurs in almost all tissues of a plant body.

1. True

2. False

Q.

What is an anaphase-promoting complex?

Q. Arrange the following events in the order of occurrence in a mitotic cell division.

1. Splitting of centrosome
2. Cleavage furrow splits the cell from middle.
3. The chromatids thin into chromatin fibres
4. Nuclear membrane and nucleolus disappear
5. Splitting of centromere

1. 5→4→1→2→3
2. 5→4→1→3→2
3. 1→4→5→3→2
4. 1→4→5→2→3

Q.

Glycolysis takes place in ______.

1. All living cells
2. Prokaryotic cells
3. Eukaryotic cells only
4. None of these

Q.

Cell division leading to growth and development

1. Meiosis

2. Mitosis

3. Interphase

4. \N

Q.

Identify the correct sequence of phases during karyokinesis:

1. Interphase - karyokinesis - cytokinesis

2. - S - - karyokinesis - cytokinesis

3. All of these

4. Prophase - metaphase - anaphase - telophase

Q.

With reference to the cell division explain the following term:

Centromere:

Q.

How do organisms, whether reproduced asexually or sexually maintain constant chromosome numbers throughout several generations?

Q.

Which two processes together constitute the M phase of the cell cycle?

1. Interphase and mitosis

2. Mitosis and cytokinesis

3. Interphase and metaphase

4. G0, S and G1 phase

Q. Difference between centromere and centrosome?

Q.

The division phase of a cell, either in mitosis or meiosis is regulated by proteins called _____ and their dependent enzyme complexes called ______.

1. Histones & CDK

2. Cyclins & Histones

3. Histones & Lyases

4. Cyclins & CDK

Q. In the image given below recognise the stages in Prophase I based on the description.

1. A = Equatorial plate, B = Chromosomes, C = Kinetochore, D = Spindle fibres

2. A =Kinetochore, B = Chromosomes, C = Equatorial plate, D = Spindle fibres

3. A = Spindle fibre, B = Chromosomes, C = Equatorial plate, D = Kinetochore

4. A = Kinetochore, B = Spindle fibres, C = Equatorial plate, D = Chromosomes

Q.

Asexual reproduction is an example of meiotic division.

1. True

2. False

Q. ___ is a structure that forms a network of protein cables during cell division.

Q. Cytokinins help in accelerating cell growth and cell division.

1. True
2. False

Q.

Which of these is NOT TRUE about mitosis in humans:

1. It stops after about 18 when we stop growing.

2. It ensures the same number of chromosomes as the original cell is maintained.

3. Each mitotic division of a somatic cell produces two diploid cells.

4. It helps in growth, repair and replacement of tissue.

Q.

What is the phase of mitosis involving the division of cytoplasm called?

Enter 1 word only.

__

Q.

What occurs after mitosis?

Q. The term cytokinesis is associated with the division of

1. nucleus
2. cytoplasm
3. chromosomes
4. DNA

Q.

Once mitosis is complete, the cells go through a phase in which the cytoplasm in the cells increases. What is this phase called?

1. S phase

2. R phase

3. G1 phase

4. G2 phase

Q. Define the following:
(i) Karyokinesis
(ii) Cytokinesis
(iii) Chiasmata

Q.

Synthesis phase in the cell cycle is the replication of

1. RNA

2. Proteins

3. DNA

4. RNA and proteins

Q. Mitosis results in
(a) gamete
(b) growth and repair
(c) both (a) & (b)
(d) none of these

Q. The terms karyokinesis and cytokinesis signify the same process.

1. True
2. False