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
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Subtopic: Carbohydrates - Classification & D-L configuration |
70%
Level 2: 60%+
NEET - 2022
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Given below are two statements:
In the light of the above statements choose the correct answer from the options given below:
| Statement I: | A unit formed by the attachment of a base to 1' position of sugar is known as a nucleoside. |
| Statement II: | When nucleoside is linked to phosphorous acid at 5' position of sugar moiety, we get nucleotide. |
| 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: DNA, RNA & Metal Ions |
Level 4: Below 35%
NEET - 2023
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Cheilosis occurs due to the deficiency of:
| 1. | Thiamine | 2. | Nicotinamide |
| 3. | Pyridoxamine | 4. | Riboflavin |
Subtopic: Vitamins, Hormones & Enzymes |
70%
Level 2: 60%+
NEET - 2023
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RNA upon hydrolysis, generates different quantities of different bases. It shows that RNA is :
1. Doubly - stranded.
2. Single - stranded.
3. Triple - helical in structure.
4. Having deoxyribose sugar.
1. Doubly - stranded.
2. Single - stranded.
3. Triple - helical in structure.
4. Having deoxyribose sugar.
Subtopic: DNA, RNA & Metal Ions |
87%
Level 1: 80%+
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Which statement accurately describes the behavior of water in an egg when boiled?:
1. Precipitated out.
2. Adsorbed by the coagulated protein.
3. Absorbed by the eggshell.
4. Both (1) and (3)
1. Precipitated out.
2. Adsorbed by the coagulated protein.
3. Absorbed by the eggshell.
4. Both (1) and (3)
Subtopic: Denaturation of Proteins & Chemical Properties |
66%
Level 2: 60%+
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Pentaacetate of D-glucose reaction with NH2OH justifies the:
| 1. | Absence of aldehyde group. | 2. | Presence of ketone group. |
| 3. | Presence of aldehyde group. | 4. | Presence of alcohol group. |
Subtopic: Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
Hints
Match the compounds in Column-I with their corresponding common names in Column-II:
Options:
1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
3. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
| Column-I (Compounds) |
Column-II (Common name) |
||
| (a) | Sucrose | (i) | Malt sugar |
| (b) | Lactose | (ii) | Cone sugar |
| (c) | Fructose | (iii) | Milk sugar |
| (d) | Maltose | (iv) | Fruit sugar |
1. (a)-(ii), (b)-(iii), (c)-(iv), (d)-(i)
2. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
3. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
Subtopic: Carbohydrates - Classification & D-L configuration |
91%
Level 1: 80%+
Please attempt this question first.
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Please attempt this question first.
The RBC deficiency is a deficiency disease of:
| 1. | Vitamin B1 | 2. | Vitamin B2 |
| 3. | Vitamin B12 | 4. | Vitamin B6 |
Subtopic: Vitamins, Hormones & Enzymes |
87%
Level 1: 80%+
NEET - 2021
Hints
Consider the following statements:
| a. | Proteins are synthesized by various RNA molecules in the cell and commands for protein synthesis are present in DNA. |
| b. | RNA contains β-D-ribose and DNA contains β-D-2-deoxyribose. |
| c. | RNA contains thymine and DNA contains uracil. |
| d. | RNA molecules are of three types, that is, messenger RNA, ribosomal RNA, and transfer RNA |
The incorrect statement(s) are:
1. a, b and d
2. Only a and b
3. Only d
4. Only c
Subtopic: DNA, RNA & Metal Ions |
74%
Level 2: 60%+
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