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Q. No.If we represent the chemical composition of living tissue from abundance point of view and arrange them class-wise, the second most abundant chemical in living organisms is:
1. Water
2. Protein
3. Carbohydrate
4. Nucleic acid
Subtopic: Element Analysis |
77%
From NCERT
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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
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%
From NCERT
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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%
From NCERT
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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 |
91%
From NCERT
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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
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%
From NCERT
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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 is increased
4. catalytic activity remains same
1. catalytic activity is lost
2. catalytic activity is reduced
3. catalytic activity is increased
4. catalytic activity remains same
Subtopic: Enzyme Cofactors |
85%
From NCERT
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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
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 |
61%
From NCERT
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Subtopic: Lipids |
76%
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A protein is imagined as a line, where:
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.
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.
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: Proteins |
79%
From NCERT
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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%
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