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Subtopic: Element Analysis |
87%
From NCERT
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Many organic substances are negatively charged e.g., acetic acid, while others are positively charged e.g., ammonium ion. An amino acid under certain conditions would have both positive and negative charges simultaneously in the same molecule. Such a form of amino acid is called
1. Positively charged form
2. Negatively charged form
3. Neutral form
4. Zwitter ionic form
1. Positively charged form
2. Negatively charged form
3. Neutral form
4. Zwitter ionic form
Subtopic: Amino Acids |
94%
From NCERT
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In a polypeptide or a protein, amino acids are linked by a peptide bond which is formed:
1. Only I
2. Only II
3. Both I and II
4. Neither I nor II
| I: | when the carboxyl (-COOH) group of one amino acid reacts with the amino (-NH2) group of the next amino acid |
| II: | with the elimination of a water moiety (the process is called dehydration) |
2. Only II
3. Both I and II
4. Neither I nor II
Subtopic: Zwitter ion & Peptide Bond |
88%
From NCERT
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Consider the given two statements:
1. Only Statement I is correct
2. Only Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
| Statement I: | The right end of the glycogen molecule is called the reducing end and the left end is called the non-reducing end. |
| Statement II: | Glycogen is a homopolymer of alpha glucose. |
2. Only Statement II is correct
3. Both Statement I and Statement II are correct
4. Both Statement I and Statement II are incorrect
Subtopic: Carbohydrates: Starch & Glycogen |
78%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Lipids are macromolecules |
| Reason (R): | They have a molecular weight range of ten thousand Daltons and above. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Element Analysis |
52%
From NCERT
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Consider the given two statements:
| I: | Palmitic acid has 16 carbons including the carboxyl carbon. |
| II: | Arachidonic acid has 20 carbons including the carboxyl carbon. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Lipids |
91%
From NCERT
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Subtopic: Lipids |
75%
From NCERT
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What is a prosthetic group in the context of proteins?
| 1. | A protein fragment that is temporarily associated with a biomolecule. |
| 2. | An inorganic ion that temporarily binds to enzymes to activate them. |
| 3. | A non-proteinaceous unit permanently attached to proteins that is essential for their function. |
| 4. | A secondary structure element that provides stability to proteins. |
Subtopic: Enzyme Cofactors |
71%
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 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%
From NCERT
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Almost all enzymes are proteins but a few may be:
| 1. | nucleic acids | 2. | carbohydrates |
| 3. | lipids | 4. | metal ions |
Subtopic: Enzymes |
80%
From NCERT
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