Q. No.The phase of mitosis in which the spindle fibers break apart, two new nuclear membranes begin to form, and the chromosomes disperse into chromatin is
1. metaphase
2. telophase
3. anaphase
4. prophase
1. metaphase
2. telophase
3. anaphase
4. prophase
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The most important significance of meiosis is that:
1. It increases variations in the gene pool of the species that helps in evolution of that species.
2. It causes growth in the multicellular organisms
3. It conserves specific number of chromosomes in each species across generations
4. It is vital for repair and regeneration functions in the living organisms.
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Consider the following statements regarding meiosis:
I. At metaphase I the microtubules from the opposite poles of the spindle attach to the pair of homologous chromosomes.
II. At anaphase I, the homologous chromosomes separate, while sister chromatids remain associates with each other.
Of the two statements:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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Consider the following key events:
I. Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements.
II. Nucleolus, golgi complex and ER reform
The stage of mitosis characterized by these key events is:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
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Identify the correct statement regarding meiosis amongst the following:
I. Meiosis involves two sequential cycles of nuclear and cell divisions but only a single cycle of DNA replication.
II. Meiosis II is initiated after the parental chromosomes have replicated to produce identical sister chromatids at the S phase
III. Meiosis involves pairing of bivalents and recombinations between them.
1. I only
2. I and II only
3. I and III only
4. I, II and III
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Consider the following two statements:
I. The growth of multi-cellular organisms is due to mitosis.
II. Mitosis results in the production of diploid daughter cells with identical genetic complement usually.
Of the two statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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The stage of mitosis at which morphology of chromosomes is most easily studied is the:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
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Consider the following events:
I. Centromere split and chromatids separate.
II. Chromatids move to opposite poles
The stage of mitosis characterized by these two events is:
1. Prophase
2. Metaphase
3. Anaphase
4. Telophase
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What stage of the cell division is shown in the following diagram of a cell undergoing cell division?
1. Prophase I
2. Prophase II
3. Telophase I
4. Telophase II
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Given below is the schematic representation of a typical cell cycle:
The duration of which of the stages shown is the diagram, according to you, is highly exaggerated with respect to other stages?
1. G1
2. G2
3. S
4. M
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