Given below is a schematic break-up of the phases/stages of the cell cycle
Which one of the following is the correct indication of the stage/phase in the cell cycle?
1. B-Metaphase
2. C-Karyokinesis
3. D-Synthesis phase
4. A-Cytokinesis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAstral rays arise from
1. centriole
2. cytoplasm
3. chromatid
4. centromere.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen synapsis is complete all along the chromosome, the cell is said to have entered a stage called
(1) Zygotene
(2) pachytene
(3) diplotene
(4) diakinesis.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is not a characteristic of meiosis?
(1) It involves two stages of DNA replication one before meiosis-I and another before meiosis-II
(2) It involves recombination and crossing over
(3) Sister chromatids separate during anaphase- II
(4) Nuclear membrane disappears during prophase.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich is the longest phase of the cell cycle?
(1) M-phase
(2) Interphase
(3) Leptotene
(4) S-phase
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIdentify the correct matched pair.
(1) Segregation-Metaphase ll
(2) Significance of meiosis-production of genetically similar cells
(3) Exchange of genetic material- DIakinesis
(4) Anaphase ll of meiosis-Centromeric division
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe exchange of segments of non-sister chromatids between chromosomes of a homologous pair termed as
(1) transformation
(2) translocation
(3) crossing over
(4) chromosomal aberration
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhat is the correct sequence of the steps given here ? Also work out the process depicted in the steps.
(i) Homologous chromosomes move toward opposite poles of the cell; chromatids do not separate
(ii) Chromosomes gather together at the two poles of the cell and the nucleare membranes reform
(iii) Homologous chromosomes pair and exchange segments
(iv) Homologous chromosomes align on a central plate
(v) The haploid cells separate completely
(1) The correct sequence is and the process is meiosis-I
(2) The correct sequence is and the process is mitosis
(3) The correct sequence is and the process is meiosis-I
(4) the correct sequence is and the process is mitosis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring meiosis, the sister chromatids separate during:
(1) Anaphase II
(2) Anaphase I
(3) The S phase
(4) Synapsis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyChromosomes decondense into diffuse chromatin:
(1) At the end of telophase
(2) At the beginning of prophase
(3) At the end of interphase
(4) At the end of metaphase
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology