- 1(current)
Q. No.Match the names of the nitrogenous bases in List-I with the correct structures in List-II.
Choose the correct answer from the options given below :
| List-I (Name) | List-II (Structure) | ||
| (A) | Adenine | (I) |  |
| (B) | Cytosine | (II) |  |
| (C) | Thymine | (III) |  |
| (D) | Uracil | (IV) |  |
Choose the correct answer from the options given below :
| 1. | (A)-(III), (B)-(IV), (C)-(II), (D)-(I) |
| 2. | (A)-(III), (B)-(I), (C)-(IV), (D)-(II) |
| 3. | (A)-(IV), (B)-(III), (C)-(II), (D)-(I) |
| 4. | (A)-(III), (B)-(IV), (C)-(I), (D)-(II) |
Subtopic: DNA, RNA & Metal Ions |
78%
Level 2: 60%+
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A nitrogenous base is present in RNA nucleotides but not in DNA nucleotides. How many oxygen atoms does this base contain?
| 1. | Three (3) | 2. | Two (2) |
| 3. | Four (4) | 4. | One (1) |
Subtopic: DNA, RNA & Metal Ions |
63%
Level 2: 60%+
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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 |
72%
Level 2: 60%+
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Consider the following structure:
The molecule shown is a nitrogenous base found in DNA. Which DNA base does it pair with (i.e., its complementary base)?
1. Uracil
2. Cytosine
3. Guanine
4. Adenine
The molecule shown is a nitrogenous base found in DNA. Which DNA base does it pair with (i.e., its complementary base)?
1. Uracil
2. Cytosine
3. Guanine
4. Adenine
Subtopic: DNA, RNA & Metal Ions |
69%
Level 2: 60%+
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Which of the following statements about the carbohydrate "Ribose" present in DNA is correct?
A. A pentose sugar
B. Present in pyranose from
C. “D” configuration
D. A reducing sugar, when free
E. \(\alpha\)-anomeric form
Choose the correct answer from the options given below:
1. A, C and D Only
2. A, B and E Only
3. B, D and E Only
4. A, D and E Only
A. A pentose sugar
B. Present in pyranose from
C. “D” configuration
D. A reducing sugar, when free
E. \(\alpha\)-anomeric form
Choose the correct answer from the options given below:
1. A, C and D Only
2. A, B and E Only
3. B, D and E Only
4. A, D and E Only
Subtopic: Carbohydrates - Classification & D-L configuration | DNA, RNA & Metal Ions |
52%
Level 3: 35%-60%
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Both DNA and RNA are chiral molecules. The chirality in DNA and RNA arises due to the presence of :
1. D-sugar component
2. Phosphodiester linkage
3. L-sugar component
4. Nitrogenous bases
1. D-sugar component
2. Phosphodiester linkage
3. L-sugar component
4. Nitrogenous bases
Subtopic: DNA, RNA & Metal Ions |
61%
Level 2: 60%+
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- 1(current)
Q. No.
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