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Q. No.
Subtopic: Carbohydrates - Classification & D-L configuration |
70%
Level 2: 60%+
NEET - 2022
Hints
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 a 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
Hints
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
Hints
A deficiency in which of the following vitamins leads to a decrease in red blood cell (RBC) production?
| 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 |
75%
Level 2: 60%+
Hints
Monosaccharides are:
| 1. | Carbohydrates that can't be hydrolysed further to give simpler units of polyhydroxy aldehyde or ketone. |
| 2. | Classified on the basis of the number of carbon atoms and the functional group present in them. |
| 3. | The monomers of carbohydrates. |
| 4. | All of the above. |
Subtopic: Carbohydrates - Classification & D-L configuration |
85%
Level 1: 80%+
Hints
A nucleoside is different from a nucleotide as:
| Nucleoside | Nucleotide | |
| 1. | Sugar, Protein | Sugar, Protein, Phosphoric acid |
| 2. | Fatty acid, Base | Fatty acid, Base, Phosphoric acid |
| 3. | Sugar, Base | Sugar, Base, Phosphoric acid |
| 4. | Sugar, Base, Phosphoric acid | Sugar, Base |
Subtopic: DNA, RNA & Metal Ions |
81%
Level 1: 80%+
Hints
The denaturation of proteins indicates:
| 1. | The primary structure of a protein is destroyed and the enzyme loses it's activity. |
| 2. | The primary structure of a protein is destroyed and the enzyme enhances it's activity. |
| 3. | The secondary and tertiary structures of a protein are destroyed and the enzyme loses it's activity. |
| 4. | The secondary and tertiary structures of a protein are destroyed and the enzyme enhances it's activity. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
86%
Level 1: 80%+
Hints
Amino acids exhibit amphoteric behavior as:
1. They can act both as an acid and as a base.
2. They can act only as an acid but not as a base.
3. They can act only as a base but not an acid.
4. None of the above.
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
95%
Level 1: 80%+
Hints
α-helix structure of proteins is stabilized by :
| 1. | H-bonds formed between the −SH and C=O group. |
| 2. | H-bonds formed between the −NH and C=O group. |
| 3. | Ionic bonds formed between the −SH and C=O group. |
| 4. | Ionic bonds formed between the −NH and C=O group. |
Subtopic: α - Amino Acids, Peptide Bond, Proteins & Structure |
86%
Level 1: 80%+
Hints
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