Botany MCQs for NEET — Practice Questions with Answers

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hn-RNA undergoes two additional processing. Out of which, in one of them an unusual nucleotide (methyl guanosine triphosphate) is added to the 5’-end of hnRNA. This is known as

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Explanation

Heterogeneous nuclear RNA (hnRNA) undergo two additional processing known as capping and tailing. In Capping an unusual nucleotide (methyl guanosinetriphosphate) is added to the 5’ end of hnRNA. In tailing, a adenlate residues (200-300) are added at 3’ end in template independent manner. In splicing, intorns are removed and exons are joined in a definite order.

The technique of DNA fingerprinting involves the following events in the order

1isolation of DNA

2-DNA digestion by Restriction Endonuclease

3-DNA separation

4-Southern blotting

(5)Hybridisation

(6)Autoradiography

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Explanation

solution- Refer NCERT ,heading 6.10, page- 122, para 2,point (i) to (vi)

 

The main enzyme for DNA replication is

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Explanation

solution- Refer NCERT, heading 6.4.2, page-106, para 1 line 2nd and 3rd

The energy for the DNA replication comes from

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Explanation

solution- Refer NCERT ,heading 6.4.2, page-106, para 1, line 13th and 14th

which of the following purposes are not served by Deoxyribonucleoside triphosphates

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Explanation

solution- Refer NCERT ,heading 6.4.2, page-106, para 1 line 14th to 16th

The small opening of the DNA helix where replication occurs is known as

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Explanation

solution- Refer NCERT ,heading 6.4.2, page-106, para 2 line 6th

The template of DNA on which discontinuous replication occurs has polarity

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Explanation

solution- Refer NCERT, heading 6.4.2, page-106, para 2 line 11th

The discontinuously synthesised fragments are joined later by

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Explanation

solution- Refer NCERT, heading 6.4.2, page-106, para 2 line 12th

In eukaryotes, the replication of DNA takes place

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Explanation

solution- Refer NCERT , heading 6.4.2, page-107, para 2 line 3rd and S phase lies between G1 and G2 phase of the cell cycle

Which of the following statement is not true for origin of replication

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Explanation

solution- Refer NCERT, heading 6.4.2, page-107, para 1 line 2nd and 3rd

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