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Q. No.Read the following statements carefully and choose the correct ones:
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 |
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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 |
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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 |
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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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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 |
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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 |
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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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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 |
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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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