Select the correct option: I II ( a ) Synapsis aligns homologous chromosomes ( i ) Anaphase – II ( b ) Synthesis of RNA and protein ( i i ) Zygotene ( c ) Action of enzyme recombinase ( i i i ) G 2 – phase ( d ) Centromeres do not separate but chromatids move towards opposite poles ( i v ) Anaphase – I ( v ) Pachytene

( a ) ( i i ) ( b ) ( i i i ) ( c ) ( v ) ( d ) ( i v )

( a ) ( i i ) ( b ) ( i ) ( c ) ( i i i ) ( d ) ( i v )

( a ) ( i ) ( b ) ( i i ) ( c ) ( v ) ( d ) ( i v )

( a ) ( i i ) ( b ) ( i i i ) ( c ) ( i v ) ( d ) ( v )

EASY

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In mitosis nucleolus and nuclear membrane disappear at

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Important Questions on Cell Cycle and Cell Division

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Which of the following options gives the correct sequence of events during mitosis?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Which of the following is not a characteristic feature during mitosis in somatic cells?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Which ONE of the following sequences of events CORRECTLY represents mitosis?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Spindle formation can be disuupted by exposing cell to the microtubule poison ?

HARD

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

A cell weighing

1 mg

grows to double its initial mass before dividing into two daughter cells of equal mass. Assuming no death, at the end of 100 divisions what will be the ratio of the mass of the entire population of these cells to that of the mass of the Earth? Assume that mass of the earth is

10^{24} kg

and

2^{10}

is approximately equal to 1000.

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

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 the cell plate and thus the cell is containing more chromosomes as compared to other dividing cells. This would result in:

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

The stage during which separation of the paired homologous chromosomes begins is

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Fill in the blanks
During metaphase, spindle fibres attach to ________.
Centromeres split and chromatids __________ during __________.

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Below features indicates which phase of mitosis?
(i) Chromosomes cluster at opposite spindle poles and their identity is lost as discrete elements
(ii) Nuclear envelope assembles around the chromosome clusters
(iii) Nucleolus, Golgi complex and ER reform

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Which one of the following never occurs during mitotic cell division?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Which ONE of the following statements about mitosis is CORRECT?

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Select the incorrect statement with reference to mitosis:

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Attachment of spindle fibers to kinetochores of chromosomes becomes evident in:

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Select the correct statements.

A. Tetrad formation is seen during the Leptotene.

B. During Anaphase, the centromeres split and chromatids separate.

C. Terminalization takes place during Pachytene.

D. Nucleolus, Golgi complex and ER are reformed during Telophase.

E. Crossing over takes place between sister chromatids of homologous chromosomes.

Choose the correct answer from the options given below:

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Select the correct option:

	I		II
( $a$ )	Synapsis aligns homologous chromosomes	( $i$ )	Anaphase – II
( $b$ )	Synthesis of RNA and protein	( $i i$ )	Zygotene
( $c$ )	Action of enzyme recombinase	( $i i i$ )	$G_{2}$ – phase
( $d$ )	Centromeres do not separate but chromatids move towards opposite poles	( $i v$ )	Anaphase – I
		( $v$ )	Pachytene

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Arrange the following events of meiosis in the correct sequence:

i. Crossing over

ii. Synapsis

iii. Terminalisation of chiasmata

iv. Disappearance of the nucleolus

EASY

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Spindle fibres attach on to:

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

By comparing mitosis and meiosis occurring in the same organism, which ONE of the following options is CORRECT regarding the DNA content per cell?

MEDIUM

Biology>Cell: Structure and Functions>Cell Cycle and Cell Division>Mitosis

Select the incorrect match.

In mitosis nucleolus and nuclear membrane disappear at

Important Questions on Cell Cycle and Cell Division

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