Q. No.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
(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
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
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