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Q. No.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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Which of the following statements is/are correct?
(a) Nucleotide contains 2'-5' phosphodiester bond for the DNA backbones
(b) Quaternary structure of protein is a compact folded structure that describes how multiple independent polypeptide chains bend, fold, and interact with one another.
(c) During denaturation of protein secondary and tertiary structure are destroyed, and primary structure is retained.
(d) Enthalpy of enzymatic hydrolysis of sucrose is greater than acid catalysed hydrolysis of sucrose.
1. a, b, c
2. b, c
3. a, d
4. b, c, d
(a) Nucleotide contains 2'-5' phosphodiester bond for the DNA backbones
(b) Quaternary structure of protein is a compact folded structure that describes how multiple independent polypeptide chains bend, fold, and interact with one another.
(c) During denaturation of protein secondary and tertiary structure are destroyed, and primary structure is retained.
(d) Enthalpy of enzymatic hydrolysis of sucrose is greater than acid catalysed hydrolysis of sucrose.
1. a, b, c
2. b, c
3. a, d
4. b, c, d
Subtopic: Denaturation of Proteins & Chemical Properties | DNA, RNA & Metal Ions |
Level 4: Below 35%
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How many tri peptides are possible when following three amino acid make tri peptide?
(No amino acid should repeat twice)
(A) Glycine (B) Alanine (C) Valine
1. 4
2. 6
3. 8
4. 9
(No amino acid should repeat twice)
(A) Glycine (B) Alanine (C) Valine
1. 4
2. 6
3. 8
4. 9
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
Level 4: Below 35%
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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 |
67%
Level 2: 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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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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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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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 |
68%
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 |
74%
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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