Q. No.Incorrect statement among the following is :
| 1. | In DNA the sugar moiety is β-D-2-deoxyribose |
| 2. | Thymine is absent in RNA |
| 3. | Nucleotides are joined together by phosphodiester linkage between 5' and 3' carbon atoms of a pentose sugar |
| 4. | Cytosine is a bicyclic nitrogenous base |
Subtopic: Carbohydrates - Classification & D-L configuration | α - Amino Acids, Peptide Bond, Proteins & Structure |
75%
Level 2: 60%+
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Which one of the following bases is not present in DNA?
| 1. | Adenine | 2. | Cytosine |
| 3. | Thymine | 4. | Quinoline |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
95%
Level 1: 80%+
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Which of the following links amino acids together in a protein ?
| 1. | β -glycosidic bond | 2. | Peptide bond |
| 3. | Dative bond | 4. | α -glycosidic bond |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
93%
Level 1: 80%+
NEET - 2016
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Match Column-I with Column-II and mark the correct option:
1. (A) → (ii), (B) → (i), (C) → (iii), (D) → (iv)
2. (A) → (iv), (B) → (i), (C) → (ii), (D) → (iii)
3. (A) → (iii), (B) → (iv), (C) → (i), (D) → (ii)
4. (A) → (i), (B) → (iii), (C) → (iv), (D) → (ii)
| Column-I | Column-II | ||
| (A) | Peptide linkage | (i) | Inversion |
| (B) | Nucleic acid | (ii) | Polysaccharide |
| (C) | Hydrolysis of cane sugar | (iii) | Proteins |
| (D) | Starch | (iv) | Nucleotides |
1. (A) → (ii), (B) → (i), (C) → (iii), (D) → (iv)
2. (A) → (iv), (B) → (i), (C) → (ii), (D) → (iii)
3. (A) → (iii), (B) → (iv), (C) → (i), (D) → (ii)
4. (A) → (i), (B) → (iii), (C) → (iv), (D) → (ii)
Subtopic: Carbohydrates - Classification & D-L configuration | α - Amino Acids, Peptide Bond, Proteins & Structure |
93%
Level 1: 80%+
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Out of the following, which type of interaction is responsible for the stabilisation of -helix structure of proteins?
| 1. | Ionic bonding | 2. | Hydrogen bonding |
| 3. | Covalent bonding | 4. | Vander Waals forces |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
91%
Level 1: 80%+
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Given below are two statements:
| Assertion (A): | Purine bases present in DNA are adenine and guanine. |
| Reason (R): | The base thymine is present in RNA, while base uracil is present in DNA. |
| 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. | (A) is False, but (R) is True. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
88%
Level 1: 80%+
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Match the structure of the bases in Column-I with their names given in Column-II:
Choose the correct answer from the options given below:
| Column-I | Column-II | ||
| A. |  |
I. | Uracil |
| B. |  |
II. | Adenine |
| C. |  |
III. | Cytosine |
| D. |  |
IV. | Thymine |
Choose the correct answer from the options given below:
| (A) | (B) | (C) | (D) | |
| 1. | (IV) | (II) | (III) | (I) |
| 2. | (I) | (II) | (III) | (IV) |
| 3. | (II) | (III) | (IV) | (I) |
| 4. | (IV) | (I) | (II) | (III) |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
89%
Level 1: 80%+
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In humans, the main oxygen carrier in the blood is:
1. Hemocyanin
2. Proteins
3. Haemoglobin
4. Both microorganisms and haemoglobin.
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
88%
Level 1: 80%+
NEET - 2017
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Given below are two statements:
| Assertion (A): | In presence of an enzyme, the substrate molecule can be attacked by the reagent effectively. |
| Reason (R): | Active sites of enzymes hold the substrate molecule in a suitable position. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are FALSE. |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
88%
Level 1: 80%+
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Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be:
1. Primary structure of proteins
2. Secondary structure of proteins
3. Tertiary structure of proteins
4. Quaternary structure of proteins
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
87%
Level 1: 80%+
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