Given below are two statements:
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.
In the light of the above statements choose the correct answer from the options given below:
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: Â 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: Â Vitamins, Hormones & Enzymes |
 70%
Level 2: 60%+
NEET - 2023
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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: Â Carbohydrates - Classification & D-L configuration |
 90%
Level 1: 80%+
Please attempt this question first.
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Please attempt this question first.
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: Â Denaturation of Proteins & Chemical Properties |
 68%
Level 2: 60%+
NEET - 2022
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Subtopic: Â Carbohydrates - Classification & D-L configuration |
 70%
Level 2: 60%+
NEET - 2022
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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: Â 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: Â 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: Â Carbohydrates - Classification & D-L configuration |
Level 3: 35%-60%
Hints
The reagents with which glucose does not react to give the corresponding test/products are:
A. Tollen's reagent
B. Schiff's reagent
C. \(\text{HCN}\)
D. \(\text{NH}_2\text{OH}\)
E. \(\text{NaHSO}_3\)
Choose the correct option:
A. Tollen's reagent
B. Schiff's reagent
C. \(\text{HCN}\)
D. \(\text{NH}_2\text{OH}\)
E. \(\text{NaHSO}_3\)
Choose the correct option:
| 1. | \(\text{A}\) and \(\text{D}\) | 2. | \(\text{B}\) and \(\text{E}\) |
| 3. | \(\text{E}\) and \(\text{D}\) | 4. | \(\text{B}\) and \(\text{C}\) |
Subtopic: Â Carbohydrates - Classification & D-L configuration |
 71%
Level 2: 60%+
NEET - 2024
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Match List-II with List-II :
Choose the correct answer from the options given below:
1. A-I, B-II, C-III, D-IV
2. A-IV, B-III, C-II, D-I
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
| List-I (Vitamins) | List-II (Deficiency/other name/ property) | ||
| A. | Vitamin K | I. | RBC deficient in haemoglobin |
| B. | Vitamin \(\text{B}_{12}\) | II. | Bleeding gums |
| C. | Vitamin C | III. | Thiamine |
| D. | Vitamin \(\text{B}_1\) | IV. | Fat soluble |
1. A-I, B-II, C-III, D-IV
2. A-IV, B-III, C-II, D-I
3. A-I, B-IV, C-II, D-III
4. A-IV, B-I, C-II, D-III
Subtopic: Â Vitamins, Hormones & Enzymes |
 80%
Level 1: 80%+
NEET - 2024
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