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Q. No.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
Subtopic: DNA, RNA & Metal Ions |
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Level 2: 60%+
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Given below are two statements:
1. Statement-I is true and Statement-II is false.
2. Statement-I is false and Statement-II is true.
3. Only Statement-I is correct.
4. Only Statement-II is correct.
| Statement-I : | Sucrose is dextrorotatory but upon hydrolysis it becomes laevorotatory. |
| Statement-II: | Sucrose on hydrolysis gives glucose and fructose such that the levorotation of glucose is more than dextrorotation of fructose. |
1. Statement-I is true and Statement-II is false.
2. Statement-I is false and Statement-II is true.
3. Only Statement-I is correct.
4. Only Statement-II is correct.
Subtopic: Carbohydrates - Classification & D-L configuration |
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Level 2: 60%+
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Read the following statements carefully and choose the correct ones:
Identify the correct statements-
1. A and B
2. A, B, and D
3. C and D
4. A, B, and C
| Statement A: | Tryptophan and arginine are essential amino acids |
| Statement B: | Glycine has no chiral center |
| Statement C: | Proline has a 6-membered ring |
| Statement D: | Cysteine is an amino acid having a sulphur atom |
Identify the correct statements-
1. A and B
2. A, B, and D
3. C and D
4. A, B, and C
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
83%
Level 1: 80%+
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The four different amino acids are given \(\mathrm{A, B, C} \) and \(\mathrm{D.}\) Calculate the number of tetrapeptides formed including all the four amino acids.
1. \(8\)
2. \(16\)
3. \(24\)
4. \(32\)
1. \(8\)
2. \(16\)
3. \(24\)
4. \(32\)
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
Level 3: 35%-60%
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Given below are two statements:
| Statement I: | Wet cotton cloths made up of cellulose based carbohydrate takes comparatively longer time to get dried than wet nylon based clothes. |
| Statement II: | Intermolecular hydrogen bonding with water molecule is more in nylon based clothes than in cotton clothes. |
| 1. | Statement I and Statement II both are correct. |
| 2. | Statement I is correct but Statement II is incorrect. |
| 3. | Statement I is incorrect but Statement II is correct. |
| 4. | Both Statement are incorrect. |
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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A dipeptide X upon hydrolysis, furnishes amino acids Y and Z. Y with HNO₂ produces lactic acid, Z on heating cyclises to give the compound shown.
Identify Y and Z, respectively:
| 1. | Alanine and Lysine | 2. | Alanine and Glycine |
| 3. | Glycine and Alanine | 4. | Valine and Glycine |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
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Level 2: 60%+
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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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Which of the following conversions occur during acidic hydrolysis?
Choose the correct answer from the options given below:
1. (C), (D) and (E) only
2. (A), (B) and (C) only
3. (B), (C) and (E) only
4. (B), (C) and (D) only
| (A) | Starch gives galactose. |
| (B) | Cane sugar gives equal amounts of glucose and fructose. |
| (C) | Milk sugar gives glucose and galactose. |
| (D) | Amylopectin gives glucose and fructose. |
| (E) | Amylose gives only glucose. |
1. (C), (D) and (E) only
2. (A), (B) and (C) only
3. (B), (C) and (E) only
4. (B), (C) and (D) only
Subtopic: Polysaccharides & their Importance |
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Level 2: 60%+
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Given below are two statements:
| Statement I: | Fructose does not contain an aldehydic group but still reduces Tollen’s reagent. |
| Statement II: | In the presence of base, fructose undergoes rearrangement to give glucose. |
| 1. | Statement I is false but Statement II is true. |
| 2. | Both Statement I and Statement II are true. |
| 3. | Both Statement I and Statement II are false. |
| 4. | Statement I is true but Statement II is false. |
Subtopic: Carbohydrates - Classification & D-L configuration |
67%
Level 2: 60%+
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Match the saccharides in List-I with their corresponding glycosidic linkages in List-II:
Choose the correct answer from the options given below :
1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
3. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
4. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
| List-I (Saccharides) |
List-II (Glycosidic linkages found) |
||
| (A) | Sucrose | (I) | \(\alpha\) 1 - 4 |
| (B) | Maltose | (II) | \(\alpha\) 1 – 4 and \(\alpha\) 1 – 6 |
| (C) | Lactose | (III) | \(\alpha\) 1 – \(\beta\) 2 |
| (D) | Amylopectin | (IV) | \(\beta\) 1 – 4 |
Choose the correct answer from the options given below :
1. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
2. (A)-(IV), (B)-(II), (C)-(I), (D)-(III)
3. (A)-(II), (B)-(IV), (C)-(III), (D)-(I)
4. (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
Subtopic: Polysaccharides & their Importance |
83%
Level 1: 80%+
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