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Assertion (A) In anaphase-II, chromosomes align at the equator
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Medium
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Solving time: 3 mins

Assertion (A) In anaphase-II, chromosomes align at the equator.
Reason (R) The centromere of each chromosome splits and chromatids separate.

A
Both A and R are true and is the correct explanation of

B
Both A and R are true, but is not the correct explanation of A

C
A is true, but is false

D
A is false, but R is true

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CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Assertion (A) In anaphase-II, chromosomes align at the equator.
Reason (R) The centromere of each chromosome splits and chromatids separate.
7 mins ago
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Text SolutionText solutionverified iconVerified

(d) A is false, but R is true. A can be corrected as In metaphase-II, the chromosomes align at the single equatorial plate.
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Practice questions from CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

Question 1
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The figure given below depicts a sub-stage in prophase of meiosis-II. 'This phase is characterised by crossing over where non-sister chromatids of homologous chromosomes exchange segments'. Is the above statement correct? Provide reason for your answer.
Topic

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Cell Cycle and Cell Division

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CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Read the following passage and answer the questions that follows.
In a lecture on cell cycle and its division, the teacher taught the two basic stages of cell cycle viz., interphase and M-phase. She also taught about the sub-stages of each basic stage and their significance.
What would be the amount of DNA and chromosome in each sub-stage of interphase, if the initial amount is and , respectively?
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Cell Cycle and Cell Division

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CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Consider the following statements and choose the incorrect ones.
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II. Asters are the microtubules which radiate out from each centrosome.
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Codes
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  4. III and IV
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Topic:

Cell Cycle and Cell Division

Book

Book:

CBSE New Pattern Biology Class 11 for 2021-22 Exam MCQs based book for Term 2

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Question 4
Medium
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Crossing over takes place between which chromatids and in which stage of the cell cycle?
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  2. Non-sister chromatids of homologous chromosomes at pachytene stage of prophase-I
  3. Non-sister chromatids of homologous chromosomes at zygotene stage of prophase-I
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Book

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Question Text
Assertion (A) In anaphase-II, chromosomes align at the equator.
Reason (R) The centromere of each chromosome splits and chromatids separate.
TopicCell Cycle and Cell Division
SubjectBiology
ClassClass 11
Answer TypeText solution:1
Upvotes61