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NEET 2015 Biology question

BiologyCell Cycle and Cell DivisionNEET 2015

Select the correct option :- I (a) Synapsis aligns homologous chromosomes (b) Synthesis of RNA and protein (c) Action of enzyme recombinase (d) Centromeres do not separate but chromatids move towards opposite poles II (i) Anaphase-II (ii) Zygotene (iii) G2-phase (iv) Anaphase-I (v) Pachytene

Answer: (1)

Solution

(a) Synapsis, the pairing of homologous chromosomes (formation of the synaptonemal complex), occurs in zygotene of prophase I: (a)-(ii). (b) RNA and protein synthesis for mitosis occurs in the G2 phase of the cell cycle: (b)-(iii). (c) Recombinase catalyses the crossing over between non-sister chromatids in pachytene:

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Question ID VK-091742