Regarding meiosis, which of the statements is incorrect?

DNA replication occurs in S phase of meiosis-II

Pairing of homologous chromosomes and recombination occurs in meiosis-I

Four haploid cells are formed at the end of meiosis-II

There are two stages in meiosis, meiosis-I and II

The appearance of recombination nodules on homologous chromosomes during meiosis characterizes:

Sites at which crossing over occurs

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

Pairing of homologous chromosomes

Movement of centrioles towards opposite poles

Coiling and condensation of the chromatids

Spindle fibres attach to kinetochores of chromosomes

Match the following events that occur in their respective phases of the cell cycle and select the correct option: Column-I Column-II (a) G 1 phase (i) Cell grows and organelle duplication (b) S phase (ii) DNA replication and chromosome duplication (c) G 2 phase (iii) Cytoplasmic growth (d) Metaphase in M - phase (iv) Alignment of chromosomes

( a ) - ( i ) , ( b ) - ( ii ) , ( c ) - ( iii ) , ( d ) - ( iv )

( a ) - ( ii ) , ( b ) - ( iii ) , ( c ) - ( iv ) , ( d ) - ( i )

( a ) - ( iii ) , ( b ) - ( iv ) , ( c ) - ( i ) , ( d ) - ( ii )

( a ) - ( iv ) , ( b ) - ( i ) , ( c ) - ( ii ) , ( d ) - ( iii )

Match Column - I with Column - II. Column -I Column -II (a) S phase (i) Proteins are synthesized (b) G 2 phase (ii) Inactive phase (c) Quiescent stage (iii) Interval between mitosis and initiation of DNA replication (d) G 1 phase (iv) DNA replication Choose the correct answer from options given below.

( a ) - ( iv ) ; ( b ) - ( i ) ; ( c ) - ( ii ) ; ( d ) - ( iii )

( a ) - ( iii ) ; ( b ) - ( ii ) ; ( c ) - ( i ) ; ( d ) - ( iv )

( a ) - ( iv ) ; ( b ) - ( ii ) ; ( c ) - ( iii ) ; ( d ) - ( i )

( a ) - ( ii ) ; ( b ) - ( iv ) ; ( c ) - ( iii ) ; ( d ) - ( i )

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

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Important Questions on Cell Cycle and Cell Division

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 7th May 2017>Q 22

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?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 24th July 2016>Q 23

During cell growth, DNA synthesis takes place in

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 24th July 2016>Q 24

Which of the following checkpoint is predominantly activated when the DNA has started forming replication fork?

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 24th July 2016>Q 25

Match the stages of meiosis of Column-I to their characteristic features in Column-II and select the correct option using the codes given below:

Column-I		Column–II
a.	Pachytene	(i)	The pairing of homologous chromosomes
b.	Metaphase I	(ii)	Terminalization of chiasmata
c.	Diakinesis	(iii)	Crossing-over takes place
d.	Zygotene	(iv)	Chromosomes align at the equatorial plate

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 1st May 2016>Q 26

Spindle fibres attach on to:

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 1st May 2016>Q 27

In meiosis, crossing over is initiated at _________.

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 1st May 2016>Q 28

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

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EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR BIOLOGY>Chapter 10 - Cell Cycle and Cell Division>NEET - 1st May 2016>Q 29

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:

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

Important Questions on Cell Cycle and Cell Division

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