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:
(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
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. | Chromosomes 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 |