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Q. No.The two strands of polynucleotides in a DNA double helix:
I.
are identical.
II.
are complementary.
III.
are parallel.
IV.
are antiparallel.
1.
Only I and II are correct
2.
Only III and IV are correct
3.
Only I and III are correct
4.
Only II and IV are correct
Subtopic: The DNA |
93%
Level 1: 80%+
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Match each item in Column-I with one in Column-II and select the correct match from the codes given:
Codes:
| Column-I | Column-II | ||
| A. | Lyases | P. | catalyse removal of groups from substrates by mechanisms other than hydrolysis, leaving double bonds |
| B. | Ligases | Q. | catalyse the linking together of 2 compounds |
| C. | Transferases | R. | catalyse the transfer of a group other than hydrogen between a pair of substrates |
| D. | Isomerases | S. | catalyse inter-conversion of optical, geometric or positional isomers |
Codes:
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | P | R | S |
| 3. | P | Q | S | R |
| 4. | R | R | Q | S |
Subtopic: Enzymes Classification |
90%
Level 1: 80%+
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Coenzymes nicotinamide adenine dinucleotide (NAD) and NADP contain the vitamin:
| 1. | Riboflavin | 2. | Pantothenic acid |
| 3. | Niacin | 4. | Pteroylglutamic acid |
Subtopic: Enzyme Cofactors |
92%
Level 1: 80%+
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The substrate has to go through a much higher energy state or transition state:
| I: | if it is an exothermic or spontaneous reaction. |
| II: | it is an endothermic or energy requiring reaction. |
| 1. | Only I is correct |
| 2. | Only II is correct |
| 3. | Both I and II are correct |
| 4. | Both I and II are incorrect |
Subtopic: Mechanism of Enzymes |
62%
Level 2: 60%+
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When the co-factor is removed from the enzyme:
1. catalytic activity is lost
2. catalytic activity is reduced
3. catalytic activity increases
4. catalytic activity remains same
1. catalytic activity is lost
2. catalytic activity is reduced
3. catalytic activity increases
4. catalytic activity remains same
Subtopic: Enzyme Cofactors |
84%
Level 1: 80%+
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Polysaccharides are components of cell wall in:
| I: | Plants |
| II: | Fungi |
| III: | Eubacteria |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Subtopic: Carbohydrates |
60%
Level 2: 60%+
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Subtopic: Lipids |
76%
Level 2: 60%+
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A protein is imagined as a line, where:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | the left end is represented by the first amino acid and the right end is represented by the last amino acid. |
| II: | the first amino acid is also called as C-terminal amino acid and the last amino acid is called the N-terminal amino acid. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Proteins |
79%
Level 2: 60%+
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The number of correct statement(s) from the statements given below is/are:
1. 1
2. 2
3. 3
4. 4
| I: | Cellulose is a polymeric polysaccharide consisting of only one type of monosaccharide. |
| II: | Starch is a homopolymer. |
| III: | Inulin is a polymer of fructose. |
| IV: | In glycogen, the right end is called the reducing end, and the left end is called the non-reducing end. |
2. 2
3. 3
4. 4
Subtopic: Carbohydrates: Starch & Glycogen | Carbohydrates: Cellulose, Chitin, Inulin & Agar |
77%
Level 2: 60%+
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Consider the given two statements:
| Assertion (A): | Lipids separate in the macromolecular fraction of a cell. |
| Reason (R): | Lipids are associated with membranes in a cell. |
| 1. | Both (A) and (R) are True but (R) does not explain (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True and (R) correctly explains the (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Element Analysis |
Level 3: 35%-60%
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