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30., , . Select, , A somatic cell undergoing cell division is, focused under microscope and it is, observed that the cell has completed, compaction of chromosomal material., Which of the following is not true about the, next stage from the above stage of mitosis?, , [NCERT Pg. 164], , (1) Nuclear envelope is completely, , disintegrated, (2) Chromosomes can be observed clearly, under microscope, , (3) Nucleolus, Golgi complex and ER are, reformed, , (4) Chromosomes are moved to spindle, equator, , . Gi phase, S-phase and Gz phase in the, , human cell collectively last for, , [NCERT Pg. 163], (1) 95% of the total duration of cell cycle, (2) 70% of the total duration of cell cycle, (3) 50% of the total duration of cell cycle, (4) Only 10% of total duration of cell cycle, the. correct statement, quiescent stage of the cell cycle, , [NCERT Pg. 164], , (1) The cell prepare itself for M-phase in this, stage, , w.r.t., , (2) Centriole duplication occurs in quiescent, stage, , (3) Cell remain metabolically active but no, longer proliferate, , (4) Chromosome number become double, , 33., , 34., , 35., , Read the following information about the, different stages of meiosis, , [NCERT Pg. 168, 168], , (i) Stage X —- Double metaphasic, plate formation, , (ii) Stage Y | — Very important for the, process of evolution, , (iii) Stage Z © -— Homologous, , chromosomes separate, , Which of following is incorrect about the, stage X, stage Y and stage Z?, , (1) Stage Y refers to the process of crossing, over, , (2) Stage X occurs in haploid cell, (3) Stage Z occurs prior to telophase-!, (4) Stage Y refers to 15 stage of meiosis-|, , After the completion of meiosis-ll, a cell has, 23 chromosomes and 1C amount of DNA., DNA amount at the end of Meiosis-I was, , [NCERT Pg. 169, 170], (1) 2C with 46 chromosomes, (2) 1C with 23 chromosomes, (3) 2C with 23 chromosomes, (4) 1C with 46 chromosomes, , Organelles like mitochondria and plastids, get distributed equally in daughter cells, during [NCERT Pg. 166], , (2) Anaphase, (4) G2-phase, , (1) Prophase, (3) Cytokinesis, , 36., , 37., , 38., , Select the odd one w.r.t. significance ¢, {[NCERT Pg, 167, , (1) Restore the nucleocytoplasmic ratio, , equational division, , (2) Contributes in the cell repair, , (3) Replacement of blood and epidermaj, cells, , (4) Increase the genetic variability in the, daughter cells, , DNA amount gets double in the phase, , [NCERT Pg. 163}, , (1) Prophase, , (2) Interphase, , (3) Anaphase, , (4) Telophase, , A student observed a cell at pachytene, stage of meiosis-l. He observed all the, details and note it down on the paper. Which, of the following correctly depicits the, , mentioned stage? [NCERT Pg. 168], , (1) During this stage synapsis initiates, , (2) Chromosomes are fully condensed in, pachytene, , (3) Bivalent chromosomes become distinct, and clearly appears as tetrad, , (4) X-shaped structure called chiasmata are, visible