At metaphase of mitosis, each chromosome consists of _______ chromatid(s) _______ centromere(s) ________ kinetochore(s) and _______ molecules of DNA:
(1) 2, 1, 2, 2
(2) 2, 2, 2, 2
(3) 2, 1, 1, 1
(4) 2, 1, 2, 1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn human cells chromosomes are:
(1) Always condensed during the entire cell cycle
(2) Different in different tissues
(3) Of the same size and shape
(4) Visible only during mitosis and meiosis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn prophase mitosis, which one of the following events occurs in animal cells but not in plant cells?
(1) Centrioles migrate to opposite sides of the nucleus
(2) Homologous chromosomes do not associate
(3) The nuclear envelope (membrane) breaks down
(4) Nucleoli disappear
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySynaptonemal complex is more conspicious at:
(1) Zygotene
(2) Pachytene
(3) Diplotene
(4) Leptotene
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCentrosomes are:
(1) Constricted regions of chromosomes
(2) Regions where microtubules polymerise
(3) Part of Cilia
(4) The central part of the same cell
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCellular structures which disappear during late prophase and reappear during telophase are:
(1) Mitochondria and spindle fibres
(2) Plasma membrane
(3) Nuclear membrane and nucleolus
(4) Plastid
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven:
1. Chromatid 2. Monad
3. Dyad 4. Daughter chromosome
The correct sequence in cell division is:
(a) 1, 2, 3, 4 (b) 2, 3, 1, 4 (c) 3, 2, 1, 4 (d) 4, 3, 2, 1
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCytokinesis in animal cell takes place by _______; in _______ direction while in plant cell by _______; in _______ direction:
(1) Furrowing, centrifugal, cell plate, centripetal
(2) Furrowing, centripetal, cell plate, Centrifugal
(3) Cell plate, centrifugal, furrowing, centripetal
(4) Cell plate, centripetal, furrowing, centrifugal
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLiquid endosperm in coconut is resulted due to:
(1) Karyokinesis followed by cytokinesis
(2) Failure of karyokinesis followed by cytokinesis
(3) Karyokinesis twice followed by single cytokinesis
(4) Karyokinesis is not followed by cytokinesis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyLabel the structure indicated by lines (i), (ii), (iii) and (iv):
(1) (i) - Chromatid, (ii) Centriole, (iii) Centromere, (iv) Chromosome
(2) (i) - Chromomosome, (ii) Centriole, (iii) Centromere, (iv) Chromatid
(3) (i) - Chromatid, (ii) Centromere, (iii) Centriole, (iv) Chromosome
(4) (i) - Chromomosome, (ii) Centromere, (iii) Centriole, (iv) Chromatid
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology