(A) $DNA$ replication occurs during the $S$-phase (Synthesis phase) of the cell cycle.In both mitosis and meiosis,the cell cycle includes an $S$-phase

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(A) $DNA$ replication occurs during the $S$-phase (Synthesis phase) of the cell cycle.In both mitosis and meiosis,the cell cycle includes an $S$-phase where $DNA$ content doubles before the division process begins.Therefore,$DNA$ replication is a prerequisite for both mitosis and meiosis-$I$.However,meiosis-$II$ does not involve an $S$-phase,so $DNA$ replication does not occur before meiosis-$II$.Thus,$DNA$ replication occurs in mitosis and meiosis-$I$.

Class 11 Biology Cell Cycle and Cell Division Mix Examples-Cell Cycle and Cell Division

Medium

$DNA$ replication occurs in .........

A
Mitosis and Meiosis-$I$
B
Mitosis,Meiosis-$I$ and Meiosis-$II$
C
Meiosis only
D
Mitosis only

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Class 11 Questions

Class 11

Biology Questions

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Cell Cycle and Cell Division

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Mix Examples-Cell Cycle and Cell Division

In plant cells,the number of Golgi bodies increases during:

Medium

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What is the number of chromosomes in human cells during the following phases: Metaphase,Metaphase-$I$,and Metaphase-$II$,respectively?

Medium

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Match the following columns and select the correct option:

Column-$I$ Column-$II$

$(1)$ Attachment of spindle fibers to kinetochores $(a)$ Prophase

$(2)$ Formation of contractile ring in cytoplasm $(b)$ Telophase

$(3)$ Decondensation of chromosomes $(c)$ Cytokinesis

$(4)$ Condensation of chromosomal material $(d)$ Metaphase

Medium

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Match the following columns and select the correct option:
Column-$I$ Column-$II$
$(1)$ $G_1$-phase $(a)$ Interval between $DNA$ replication and $M$-phase
$(2)$ $G_2$-phase $(b)$ Interval between $G_2$ and $G_1$ phase
$(3)$ $S$-phase $(c)$ Interval between $M$ and $DNA$ replication
$(4)$ $M$-phase $(d)$ Interval between the beginning and end of interphase

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$A$ : Endomitosis does not cause karyokinesis or cytokinesis.
$R$ : In endomitosis,mitosis occurs within the nucleus.

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Column-$I$	Column-$II$
$(1)$ Attachment of spindle fibers to kinetochores	$(a)$ Prophase
$(2)$ Formation of contractile ring in cytoplasm	$(b)$ Telophase
$(3)$ Decondensation of chromosomes	$(c)$ Cytokinesis
$(4)$ Condensation of chromosomal material	$(d)$ Metaphase

Column-$I$	Column-$II$
$(1)$ $G_1$-phase	$(a)$ Interval between $DNA$ replication and $M$-phase
$(2)$ $G_2$-phase	$(b)$ Interval between $G_2$ and $G_1$ phase
$(3)$ $S$-phase	$(c)$ Interval between $M$ and $DNA$ replication
$(4)$ $M$-phase	$(d)$ Interval between the beginning and end of interphase

$DNA$ replication occurs in .........

Similar Questions

In plant cells,the number of Golgi bodies increases during:

What is the number of chromosomes in human cells during the following phases: Metaphase,Metaphase-$I$,and Metaphase-$II$,respectively?

$A$ : Endomitosis does not cause karyokinesis or cytokinesis.$R$ : In endomitosis,mitosis occurs within the nucleus.

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$A$ : Endomitosis does not cause karyokinesis or cytokinesis.
$R$ : In endomitosis,mitosis occurs within the nucleus.