In S-phase of the cell cycle
1. amount of DNA doubles in each cell
2. amount of DNA remains same in each cell
3. chromosome number is increased
4. amount of DNA is reduced to half in each cell
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe complex formed by a pair of synapsed homologous chromosomes is called
1. equatorial plate
2. Kinetochore
3. bivalent
4. axoneme
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA stage in cell division is shown in the figure. Select the answer which gives correct
identification of the stage with its characteristics.
1. Telophase - Nuclear envelope reforms, Golgi complex reforms
2. Late anaphase - Chromosomes move away from equatorial plate, Golgi complex not
present
3. Cytokinesis - Cell plate formed, mitochondria distributed between two daughter cells
4. Telophase - Endoplasmic reticulum and nucleolus not reformed yet
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyDuring gamete formation, the enzyme recombinase participates during
1. Metaphase-I
2. Anaphase-II
3. Prophase-I
4. Prophase-II
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven below is the representation of a certain event at a particular stage of a type of cell division. Which is this stage?
1. Prophase-I during meiosis
2. Prophase-II during meiosis
3. Prophase of mitosis
4. Both prophase and metaphase of mitosis
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologySelect the correct option with respect to mitosis.
1. Chromatids start moving towards opposite poles in telophase
2. Golgi complex and endoplasmic reticulum are still visible at the end of prophase
3. Chromosomes move to the spindle equator and get aligned along equatorial plate in metaphase
4. Chromatids separate but remains in the centre of the cell in anaphase
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyGiven 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 & BiologyThe drug colchicines, used to obtain polyploidy cells, acts on the cytoskeletal structures of
the plant cells called
1. microtubules
2. actin filaments
3. intermediate filaments
4. all of the above.
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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 & BiologyNumber of mitotic division required in a cell of root tip for formation of 128 cells is
1. 12
2. 3
3. 7
4. 6
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology