Question of 96
Q.In the next two parts of Question No.-1, there are two statements labelled as Assertion (A) and Reason (R). From the following options (i), (ii),
(iii) and (iv), select their correct answer.
Assertion (A) : Nucleases enzymes are of two kinds, exonucleases and endonucleases.
Reason (R) : Endonucleases remove nucleotides from the ends of the DNA.
Reason (R) : Endonucleases remove nucleotides from the ends of the DNA.
(a) Both (A) and (R) are correct and (R) is the correct explanation of (A).
(b) Both (A) and (R) are correct but (R) is not the correct explanation of (A).
(c) (A) is correct but (R) is incorrect.
(d) Both (A) and (R) are incorrect.
Uttarakhand UbseUttarakhand Board Intermediate (Class 12) 2025MCQ· 1mImportance★★★★★
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Start your 14-day free trial to unlock the full solution →Nucleases are indeed of two kinds, but it is exonucleases — not endonucleases — that remove nucleotides from the ends of DNA.
Assertion (A) is correct: nuclease enzymes are classified into two types — exonucleases and endonucleases. However, Reason (R) is incorrect: it is exonucleases that remove nucleotides from the free 5' or 3' ends of a DNA/RNA strand, whereas endonucleases (such as restriction endonucleases) make cuts at specific sites within the nucleotide chain, …
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