(B) Statement $a$ is correct: The duration of the cell cycle varies significantly between different organisms and even between different cell types wi

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(B) Statement $a$ is correct: The duration of the cell cycle varies significantly between different organisms and even between different cell types within the same organism.Statement $b$ is incorrect: $DNA$ synthesis (replication) occurs during the $S$-phase (Synthesis phase) of interphase,not during pachytene (which is a stage of prophase-$I$ in meiosis).Statement $c$ is correct: The $G_1$ phase (Gap $1$) represents the period between the end of mitosis and the beginning of $DNA$ replication ($S$-phase).Therefore,statements $a$ and $c$ are correct.

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

Medium

Which of the following statements are correct?
$a -$ Cell cycle duration can vary from organism to organism and also from cell type to cell type.
$b -$ $DNA$ synthesis occurs only in pachytene.
$c - G_1$ phase corresponds to the interval between mitosis and initiation of $DNA$ replication.

A
$b$ and $c$
B
$a$ and $c$
C
$a$ and $b$
D
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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

If a cell has $10$ chromosomes at the anaphase stage of mitosis,how many chromosomes should a diploid cell have in this stage?

Medium

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Analogy type question:
$(1)$ Zygotene : Synapsis :: Pachytene : .......
$(2)$ Prophase-$I$ : Diakinesis :: Interval between two successive meiotic divisions : .......

Medium

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Name the stage of the cell cycle at which the following events occur:
$(i)$ Chromosomes are moved to the spindle equator
$(ii)$ Centromere splits and chromatids separate
$(iii)$ Pairing between homologous chromosomes takes place
$(iv)$ Crossing over between homologous chromosomes takes place

Easy

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Match List-$I$ with List-$II$ :
List-$I$ (Phase of cell cycle) List-$II$ (Activity)
$A$. $G_1$ phase $I$. Actual cell division occurs
$B$. $S$ phase $II$. Cell is metabolically active and continuously grows but does not replicate its $DNA$
$C$. $G_2$ phase $III$. Synthesis of $DNA$ occurs and the amount of $DNA$ per cell doubles
$D$. $M$ phase $IV$. Proteins are synthesized while cell growth continues

Choose the correct answer from the options given below :

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$A$ cell at the telophase stage is observed by a student in a plant brought from the field. He tells his teacher that this cell is not like other cells at the telophase stage. There is no formation of a cell plate,and thus the cell contains a higher number of chromosomes compared to other dividing cells. This would result in:

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List-$I$ (Phase of cell cycle)	List-$II$ (Activity)
$A$. $G_1$ phase	$I$. Actual cell division occurs
$B$. $S$ phase	$II$. Cell is metabolically active and continuously grows but does not replicate its $DNA$
$C$. $G_2$ phase	$III$. Synthesis of $DNA$ occurs and the amount of $DNA$ per cell doubles
$D$. $M$ phase	$IV$. Proteins are synthesized while cell growth continues

Which of the following statements are correct?$a -$ Cell cycle duration can vary from organism to organism and also from cell type to cell type.$b -$ $DNA$ synthesis occurs only in pachytene.$c - G_1$ phase corresponds to the interval between mitosis and initiation of $DNA$ replication.

Similar Questions

If a cell has $10$ chromosomes at the anaphase stage of mitosis,how many chromosomes should a diploid cell have in this stage?

Analogy type question:$(1)$ Zygotene : Synapsis :: Pachytene : .......$(2)$ Prophase-$I$ : Diakinesis :: Interval between two successive meiotic divisions : .......

Name the stage of the cell cycle at which the following events occur:$(i)$ Chromosomes are moved to the spindle equator$(ii)$ Centromere splits and chromatids separate$(iii)$ Pairing between homologous chromosomes takes place$(iv)$ Crossing over between homologous chromosomes takes place

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Which of the following statements are correct?
$a -$ Cell cycle duration can vary from organism to organism and also from cell type to cell type.
$b -$ $DNA$ synthesis occurs only in pachytene.
$c - G_1$ phase corresponds to the interval between mitosis and initiation of $DNA$ replication.

Analogy type question:
$(1)$ Zygotene : Synapsis :: Pachytene : .......
$(2)$ Prophase-$I$ : Diakinesis :: Interval between two successive meiotic divisions : .......

Name the stage of the cell cycle at which the following events occur:
$(i)$ Chromosomes are moved to the spindle equator
$(ii)$ Centromere splits and chromatids separate
$(iii)$ Pairing between homologous chromosomes takes place
$(iv)$ Crossing over between homologous chromosomes takes place