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Assertion Reason Test: Cell Cycle & Cell Division - NEET MCQ


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10 Questions MCQ Test - Assertion Reason Test: Cell Cycle & Cell Division

Assertion Reason Test: Cell Cycle & Cell Division for NEET 2024 is part of NEET preparation. The Assertion Reason Test: Cell Cycle & Cell Division questions and answers have been prepared according to the NEET exam syllabus.The Assertion Reason Test: Cell Cycle & Cell Division MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Assertion Reason Test: Cell Cycle & Cell Division below.
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Assertion Reason Test: Cell Cycle & Cell Division - Question 1

A: Endomitosis does not cause karyokinesis or cytokinesis.

R: In endomitosis, mitosis occurs within the nucleus.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 1
Endomitosis involves multiplication of chromosomes without karyokinesis and cytokinesis.

Assertion Reason Test: Cell Cycle & Cell Division - Question 2

A: Synaptonemal complex develops between two synapsed homologous chromosomes.

R: Mitosis cannot be completed without the synaptonemal complex.Options~

1. If both Assertion & Reason are true, and the reason is the correct explanation of the assertion.

2. If both Assertion & Reason are true, but the reason is not the correct explanation of the assertion.

3. If the Assertion is a true statement, but Reason is false.

4. If both Assertion and Reason are false statements.


Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 2

Meiosis can not be completed without the synaptonemal complex.

 

 

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Assertion Reason Test: Cell Cycle & Cell Division - Question 3

A: During anaphase-II, chromatids of a chromosome separate.

R: Centromere of a mitotic chromosome divides during anaphase.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 3
Meiosis II and mitosis both are equational division and involve splitting of centromere at anaphase-II and anaphase respectively.

Assertion Reason Test: Cell Cycle & Cell Division - Question 4

A: Dictyotene stage occurs in females only.

R: Gametogenesis rests for a long period at the diplotene stage in females.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 4
Dictyotene occurs in oocyctes.

Assertion Reason Test: Cell Cycle & Cell Division - Question 5

A: Each chromosome of bivalent attaches with two spindles in metaphase.

R: In metaphase, bivalents migrate towards the metaphasic plate.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 5
Each chromosome of bivalent attachments with a single spindle in Metaphase I. In Metaphase I one chromosome from each homologous pair migrate towards the pole.

Assertion Reason Test: Cell Cycle & Cell Division - Question 6

A: G2-phase is a pre-mitotic phase.

R: Chromosomes undergo condensation in this phase.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 6
Proteins and organelles like mitochondria and chloroplast duplicate in G2-phase.

Assertion Reason Test: Cell Cycle & Cell Division - Question 7

A: Anaphase-I is the actual phase of reduction in the number of chromosomes.

R: Homologous chromosomes move to the opposite poles with both their chromatids.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 7
Anaphase-I involves the splitting of homologous chromosomes.

Assertion Reason Test: Cell Cycle & Cell Division - Question 8

A: Golgi bodies and ER disappear in early prophase.

R: Their reorganisation stage is anaphase.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 8

In mitosisprophase is the longest phase of karyokinesis.In early prophase, nuclear membranes, nucleolus start disintegrating. cells cytoskeleton, Golgi complexER, etc disappear.

Their reorganisation occurs in telophase.

 

 

Assertion Reason Test: Cell Cycle & Cell Division - Question 9

A: The complete disintegration of the nuclear envelope marks the start of metaphase.

R: Chromosomes are distinct with two chromatids at this stage.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 9
Complete disintegration of the nuclear envelope marks the beginning of metaphase chromosomes at this phase have two distinct chromatids.

Assertion Reason Test: Cell Cycle & Cell Division - Question 10

A: Chiasmata counting stage is diplotene.

R: Dissolution of the synaptonemal complex occurs except at the sites of cross overs.

Detailed Solution for Assertion Reason Test: Cell Cycle & Cell Division - Question 10

Chiasmata represents the site of crossing over.

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