The following diagram refers to a typical cell cycle.

Identify the parts marked as X, Y and Z.

1. X - G₁; Y - S; Z - G₂                      2. X - G₂; Y - S; Z - G₁

3. X - G₀; Y - S; Z - G₂                     4. X - G₁; Y - G₂; Z - G₀

What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its roots tip cells?

(a) 21                             (b) 42                             (c) 63                             (d) 84

Identify the meiotic stage in which the homologous chromosomes separate while the sister chromatids remain associated at their centromeres:

(1) Metaphase I    

(2) Metaphase II  

(3) Anaphase I     

(4) Anaphase II

At which stage of meiosis does the genetic constitution of gametes is finally decided:

(1) Metaphase I    

(2) Anaphase II    

(3) Metaphase II   

(4) Anaphase I

Select the correct statement about G₁ phase:

(1) Cell is metabolically inactive

(2) DNA in the cell does not replicate

(3) It is not a phase of synthesis of macromolecules

(4) Cell stops growing

Which of the following number of cells can be expected from the human cell culture after 70hrs

1. 4

2. 8

3. Both 1 and 2

4. 2

Which of the following is a continuous process?
1. Cell growth (in terms of cytoplasmic increase)
2. Cell differentiation
3. DNA duplication
4. Cell division

Cell growth is a continuous process in terms of

1.      Increase in protein content

2.      Increase in DNA content

3.      Increase in cytoplasmic content

4.     Increase in RNA content

The process of distribution of duplicated DNA in the daughter cells is

1.      Easy process

2.      A complex series of events

3.      A single complex process

4.     Easiest process in all the events bof cell cycle.

How many cells can be expected in a yeast culture after  540 minutes?

1.      64

2.      512

3.      256

4.     32