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Assertion :- Every chromosome essentiall...

Assertion :- Every chromosome essentially has a primary constriction or the centromere.
Reason:- On sides of centromere disc shaped structure called kinetochore are present.

A

If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.

B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion.

C

If Assertion is True but the Reason is False

D

If both Assertion & Reason are false.

Text Solution

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The correct Answer is:
B
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Every chromosome essentially has a primary construction or the ...... , on the sides of which disc shaped structures called .... are present

Read the following four statements (i -iv) (i) Every chromosome essentially has a primary constriction or the centromere. (ii) During different stages of cell division, cells show structured chromosomes in place of the nucleus . (iii) Nuclear pores are the passages through which movement of RNA and Protein takes place in one direction between the nucleus and cytoplasm. (iv) Chromatin contains DNA, some basic proteins called histone adn RNA only . How many of the above statement are

Read the assertion and reason carefully to mark the correct option in question. Assertion: Every chromosome essentially has a kinetochore on the sides of which centromeres are present. Reason: Based on the position of centromere or primary constriction chromosomes can be classified into five types.

Every chromosome essentially has a (A)____ on the sides of which disc shaped structures called (B)_____ are present.

Assertion : The shapes of chromosomes is based on the position of centromere. Reasons : During anaphase, the chromosomes bends in the region of centromere.

The chromosome showing L-shaped structure by the presence of centromere is termed as

The centromere or primary constriction of the cromosome contains ring of protein that are intimately associated with a spindle fibre. These ring are called

a.The passage through which movement of RAN and protein molecules takes place in both directions in a nuclear pore. b. A disc - shaped structures is kinetochore is present as a lateral side of centromere c. DNA moves easily in both directions through the nuclear pore Read the following and select the correct option

Assertion : The acrocentric chromosome has centromere at the terminal position. Reason : The metacentric chromosome has centromere slightly away from the middle of the chromosome.

MOTION-CELL THE UNIT OF LIFE-Excercise - 4 AIIMS | Assertion & Reason Questions
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  2. Assertion:- Centrioles are essential for mintenance of confinuity of c...

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  3. Assertion :- Nucleus is the organised structure remains surrounded by ...

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  4. Assertion :- Every chromosome essentially has a primary constriction o...

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  5. Assertion :- Metacentric chromosomes attain 'V' shaped appearance duri...

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  6. Assertion :- Anton Von Leeuwenhoek first saw and described a live cell...

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  8. Assertion :- Endomembrane system includes ER, golgi complex, lysosome ...

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  9. Assertion :- Lampbrush chromosomes are found in Oocytes of some animal...

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  10. Assertion :- Diffusion is a passive transport. Reason:-Diffusion occ...

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  11. Assertion :- Cholesterol provides stability on eukaryotic membrane. ...

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  12. Assertion :- Complex molecules like protein are received in cell by th...

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  13. Assertion :- Cholesterol confers stability to eukaryotic plasma membra...

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  14. Assertion :- Viruses are exception of cell theory. Reason:- Virus ha...

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  15. Assertion :- Golgi-body is also known as Lipochondria. Reason:- Golg...

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  16. Assertion :- Secondary constriction is called as NOR. Reason:- Nucle...

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  17. Assertion :- Mitochondria is known as power house of cell. Reason:- ...

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  18. Assertion :- Unit membrane concept of cell wall was given by Robertson...

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  20. Assertion :- Growth and reproduction are characteristics of cells, ind...

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