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

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

(a) Metaphase I     (b) Metaphase II   (c) Anaphase I      (d) Anaphase II

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

(a) Metaphase I     (b) Anaphase II     (c) Metaphase II    (d) Anaphase I

Select the correct statement about G₁ phase:

(a) Cell is metabolically inactive

(b) DNA in the cell does not replicate

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

(d) Cell stops growing

A. Most dramatic period of cell cycle
involving a major reorganization of virtually all components of the cell
B. It represents the phase when the actual cell division occurs
These statements (A & B) are concerned with
1.S-phase                                2. G₁ phase
3. M-phase                              4. G₂ phase

Select the correct statement

1. Chromosoms decondense and lose their individuality during anaphase
2. Spindle fibres attach to kinetochores of chromosomes during early prophase
3. Centriole begins to move towards opposite poles of the cell during metaphase
4. DNA is replicated during S-phase of cell cycle

Interkinesis stage of cell cycle

1. Is generally short lived 
2. Shows DNA duplication
3. Is generally long lived
4. Is followed by prophase-I

Select the incorrect statement

1. Yeast can progress through the cell cycle in about 90 minutes
2. DNA synthesis is a continuous process in cell cycle
3. Duration of I-phase in the cell cycle is more than 95%
4. Events of cell cycle are under genetic control

Cells that do not divide further exit G₁ phase to enter an inactive stage called

1. G₂ phase                 
2. G₀ stage
3. S-phase                  
4. M-phase

Select the odd one out with respect to mitosis

1. It helps the organisms in both sexual and asexual reproduction
2. It is called equational division
3. It takes place only in diploid cells of plants
4. It helps in cell repair