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
(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
Select the mis-matched pair
(1) Leptotene – Compaction of chromosomes continued
(2) Zygotene – Appearance of recombination nodules
(3) Diplotene – beginning of dissolution of synaptonemal complex
(4) Diakinesis – Completgeterminalisation of chiasmata
Microtubules from opposite poles of the spindle attach to the pairs of homologous chromosomes during
(1) Pachytene
(2) Metaphase – I
(3) Metaphase – II
(4) Early prophase
Exchange of genetic material between two homologous chromosomes occurs in
(1) Leptotene
(2) Diakinesis
(3) Pachytene
(4) Diplotene
How many meiotic divisions are required to produce 50 wheat grains?
(1) 100
(2) 200
(3) 25
(4) 63
A typical eukaryotic cell cycle is illustrated by human cells in culture. These cells divide once in approximately every
1. 24 hours
2. 90 minutes
3. 20 minutes
4. 9 hours
Choose incorrect statement with respect to cell cycle
(1) Duration of cell cycle can vary from organism to organism
(2) Duration of cell cycle is uniform in different cell types of an organism
(3) Events of cell cycle are under genetic control
(4) It is divided into two basic phases
Choose the correct sequence with respect to different phases of cell cycle
(1) G1 S, G2, M
(2) G1, G2, S, M
(3) M, G2, G1, S
(4) S, M, G2, G1
Human nerve cells do not divide after birth and they remain throughout their life in which phase of cell cycle?
(1) M-phase
(2) G1 phase
(3) G0 phase
(4) Invisible phase
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