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  • 1(current)
Q. No.

The central dogma of molecular genetics states that the genetic information flows from:

1. amino acid - proteins - DNA

2. DNA - carbohydrates - proteins

3. DNA - RNA - proteins

4. DNA - RNA - Carbohydrates

Subtopic:   DNA, RNA & Metal Ions |
 94%
Level 1: 80%+
NEET - 2016
Hints
The correct statement regarding RNA and DNA, respectively is:
1. The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose.
2. The sugar component in RNA is arabinose and the sugar component in DNA is ribose.
3. The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose.
4.
The sugar component in RNA is arabinose and the sugar component in DNA is 2’-deoxyribose.
Subtopic:   DNA, RNA & Metal Ions |
 93%
Level 1: 80%+
NEET - 2016
Hints
Match column I with column II and mark the appropriate choice:
 
Column I Column II 
(A)  Nucleoside  (i)  Sugar + base + phosphoric acid group 
(B)   Nucleotide  (ii)  Cytosine + uracil
(C)   DNA  (iii)  Sugar + base
(D)  RNA  (iv)  Cytosine + thymine 

1. (A) → (iii), (B) → (i), (C) → (iv), (D) → (ii)
2. (A) → (i), (B) → (iv), (C) → (iii), (D) → (ii)
3. (A) → (ii), (B) → (iii), (C) → (i), (D) → (iv)
4. (A) → (iv), (B) → (ii), (C) → (i), (D) → (iii)
Subtopic:   DNA, RNA & Metal Ions |
 93%
Level 1: 80%+
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Which of the following are obtained on complete hydrolysis of RNA?
1. \(\beta\)-D-Ribose and phosphoric acid only
2. \(\beta\)-D-2-Deoxyribose and phosphoric acid only
3. \(\beta\)-D-Ribose, phosphoric acid, and nitrogen-containing heterocyclic compounds
4. \(\beta\)-D-2-Deoxyribose and nitrogen-containing heterocyclic compounds only
Subtopic:   DNA, RNA & Metal Ions |
 89%
Level 1: 80%+
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Consider the structure of the nucleoside given below: 



The attachment of phosphoric acid to which of the labeled position would lead to the formation of a nucleotide?
 
1. a and b only 
2. c only 
3. d only 
4. e only 
Subtopic:   DNA, RNA & Metal Ions |
 80%
Level 1: 80%+
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Given below are two statements: 
Assertion (A): Two strands of DNA are complementary to each other. 
Reason (R): Adenine specifically forms hydrogen bonds with guanine, whereas cytosine forms hydrogen bonds with thymine.
Select the most appropriate answer from the options given below:
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:   DNA, RNA & Metal Ions |
 83%
Level 1: 80%+
Hints
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Statement I: In DNA molecules, the sugar moiety is \(\beta\)-D-2-deoxyribose.
Statement II: In RNA molecules, the sugar moiety is \(\beta\)-D-2-arabinose.
 
1.  Statement I is correct but Statement II is incorrect.
2.  Statement I is incorrect but Statement II is correct.
3.  Both Statement I and Statement II are incorrect.
4.  Both Statement I and Statement II are correct.
Subtopic:   DNA, RNA & Metal Ions |
 82%
Level 1: 80%+
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Given below are two statements:
Assertion (A): DNA has a double-helix structure and contains thymine base.
Reason (R): The double helix provides structural stability but does not protect the genetic code.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A)
2. Both (A) and (R) are True but (R) is not the correct explanation of (A)
3. (A) is True but (R) is False
4. Both (A) and (R) are False
Subtopic:   DNA, RNA & Metal Ions |
 73%
Level 2: 60%+
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