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In animal cells, during S-phase (a) begi...

In animal cells, during S-phase (a)_____ begins in the the nucleus and (b)_____ duplicates in the cytoplasm

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To answer the question regarding what occurs during the S-phase in animal cells, we can break it down into two parts: 1. **(a) What begins in the nucleus during S-phase?** - During the S-phase of the cell cycle, DNA replication begins in the nucleus. This is a crucial process where the cell's genetic material is duplicated to ensure that each daughter cell will have an identical set of chromosomes. 2. **(b) What duplicates in the cytoplasm during S-phase?** - In the cytoplasm, the centrioles duplicate during the S-phase. Centrioles are cylindrical structures that play a key role in cell division, particularly in the formation of the spindle fibers that separate chromosomes during mitosis. So, the complete answer to the question is: (a) DNA replication begins in the nucleus and (b) centrioles duplicate in the cytoplasm.
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Knowledge Check

  • In animal cells, during the S-phase -

    A
    DNA replication occurs in nucleus and centrioles duplicate in the cytoplasm
    B
    Only DNA replication occurs in nucleus
    C
    Only Centrioles duplicate in the cytoplasm
    D
    Centrioles duplicate in the nucleus and DNA replication occurs in the cytoplasm.

  • Assertion: In plant cells, during S-phase, DNA replication begins in the nucleus, and the centriole duplicates in the cytoplasm. Reason: If the initial amount of DNA is denoted as 2n in G_(1) even after S-phase the amount of DNA remains the same i.e., 2n.

    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false.
    D
    If both assertion and reason are false.

  • In which phase of interphase centriole duplicates in cytoplasm?

    A
    `G_(1)` -phase
    B
    S-phase
    C
    `G_(2)` -phase
    D
    M - phase

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    The region between the nucleus and the cell membrane is occupied by cytoplasm.

    Which of the following duplicates in cytoplasm in S-phase ?

    During G_1 phase of cell division

    Read the following statements and identify the correct I. At G_(0) stage cell remains metabolically active II. In G_(2) phase proteins are synthesized III. In animal cells during S phase duplication of centrioles occur in cytoplasm IV. During cell cycle, most of the time cell remains in interphase

    A biosynthetic phase where cell organelles duplicate itself is

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