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Q. No.The correct statement among the following is:
1.
Melting points and solubility in the water of amino acids are higher than haloacids.
2.
Melting points and solubility in water of halo acids are higher than amino acids.
3.
Both amino acids and haloacids have comparable melting point.
4.
None of the above
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
71%
Level 2: 60%+
Hints
Lactose is a disaccharide composed of:
| 1. | \(\alpha - D-\)Glucose and \(\beta-D-\)Galactose |
| 2. | \(\beta-D-\)Glucose and \(\beta-D-\)Galactose |
| 3. | \(\beta - D-\)Glucose and \(\alpha-D-\)Galactose |
| 4. | \(\alpha - D-\)Glucose and \(\alpha-D-\)Galactose |
Subtopic: Polysaccharides & their Importance |
63%
Level 2: 60%+
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When 10 units of monosaccharides are condensed to form oligosaccharides, the number of water molecules eliminated are:
| 1. | 10 | 2. | 9 |
| 3. | 8 | 4. | 7 |
Subtopic: Polysaccharides & their Importance |
84%
Level 1: 80%+
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Subtopic: Carbohydrates - Classification & D-L configuration |
70%
Level 2: 60%+
NEET - 2022
Hints
In both DNA and RNA, heterocyclic base and phosphate ester linkages are at:
| 1. | C5' and C1' respectively of the sugar molecule. |
| 2. | C1' and C5' respectively of the sugar molecule. |
| 3. | C2' and C5' respectively of the sugar molecule. |
| 4. | C5' and C2' respectively of the sugar molecule. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
79%
Level 2: 60%+
JEE
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The incorrect statement about the denaturation of proteins is:
| 1. | It results due to change of temperature and pH. |
| 2. | It results in the loss of biological activity of proteins. |
| 3. | A protein is formed from amino acids linked by peptide bonds. |
| 4. | Uncoiling of the helical structure takes place. |
Subtopic: Denaturation of Proteins & Chemical Properties |
68%
Level 2: 60%+
NEET - 2022
Hints
Glucose and Fructose can be distinguished by the use of :
1. Fehling solution
2. Tollen's reagent
3. Bromine water
4. All of the above
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
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Subtopic: Carbohydrates - Classification & D-L configuration |
87%
Level 1: 80%+
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The total number of chiral carbons/centers in \(\beta - D- \) ribose are:
1. Three
2. Four
3. Five
4. Two
1. Three
2. Four
3. Five
4. Two
Subtopic: DNA, RNA & Metal Ions |
60%
Level 2: 60%+
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Identify the anomeric carbon in the given structure of \(\alpha-D-\) glucopyranose:
| 1. | C1 | 2. | C2 and C3 |
| 3. | C4 and C5 | 4. | C6 |
Subtopic: Carbohydrates - Classification & D-L configuration |
80%
Level 1: 80%+
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