Consider the given two statements:
Statement I:
Iodine test can detect the presence of starch but not of cellulose in a given sample.
Statement II:
Starch forms helical secondary structure and can hold iodine molecules while cellulose does not contain complex helices and hence cannot hold iodine.
1.
Both Statement I and Statement II are correct and Statement II correctly explains Statement I
2.
Both Statement I and Statement II are correct but Statement II does not correctly explain Statement I
3.
Statement I is correct but Statement II is incorrect
4.
Statement I is incorrect but Statement II is correct
Subtopic: Carbohydrates | Carbohydrates: Starch & Glycogen |
88%
From NCERT
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The true macromolecular fraction of any living tissue or cell includes all the following biomolecules except:
| 1. | Nucleic acids | 2. | Polysaccharides |
| 3. | Lipids | 4. | Proteins |
Subtopic: Introduction |
85%
From NCERT
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The chemical components of a nucleotide do not include:
| 1. | A heterocyclic compound | 2. | A monosaccharide |
| 3. | A phosphate | 4. | A saturated fatty acid |
Subtopic: Nucleic Acid: Nucleotides |
85%
From NCERT
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Subtopic: Nucleic Acid: Nucleotides | The DNA |
78%
From NCERT
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Identify the given molecules:
| I | II | |
| 1. | 2’ deoxyribose | Ribose |
| 2. | Ribose | 2’ deoxyribose |
| 3. | Adenosine | Adenylic acid |
| 4. | α glucose | β glucose |
Subtopic: Nucleic Acid |
73%
From NCERT
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Identify the correct statements:
I. The level of protein structure organization that provides the positional information of amino acids in a protein is called as the primary structure.
II. Only right handed helices are observed in proteins seen in living organisms.
III. Tertiary structure is absolutely necessary for the many biological activities of proteins.
I. The level of protein structure organization that provides the positional information of amino acids in a protein is called as the primary structure.
II. Only right handed helices are observed in proteins seen in living organisms.
III. Tertiary structure is absolutely necessary for the many biological activities of proteins.
| 1. Only I and II | 2. Only I and III |
| 3. Only II and III | 4. I, II and III |
Subtopic: Proteins |
68%
From NCERT
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The given figure shows:
1. two amino acids linked by a peptide bond formed due to dehydration synthesis
2. two nucleotides linked by a dinucleotide bond formed due to dehydration synthesis
3. two amino acids linked by a peptide bond forming a zwitter ion
4. two nucleotides linked by an ester bond due to hydrolysis
1. two amino acids linked by a peptide bond formed due to dehydration synthesis
2. two nucleotides linked by a dinucleotide bond formed due to dehydration synthesis
3. two amino acids linked by a peptide bond forming a zwitter ion
4. two nucleotides linked by an ester bond due to hydrolysis
Subtopic: Amino Acids |
80%
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In a nucleic acid:
I: a phosphate moiety links the 5’ carbon of one sugar of one nucleotide to the 1’ carbon of the sugar of the succeeding nucleotide.
II: the backbone of the strand is made up of alternate sugar and nitrogenous bases.
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: a phosphate moiety links the 5’ carbon of one sugar of one nucleotide to the 1’ carbon of the sugar of the succeeding nucleotide.
II: the backbone of the strand is made up of alternate sugar and nitrogenous bases.
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: The DNA | Double Helix : Watson & Crick |
53%
From NCERT
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The metabolic pathways in a living system:
I. are linear or circular
II. are series of linked reactions
III. are characterized by a definite rate and direction of flow of metabolites through them
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
I. are linear or circular
II. are series of linked reactions
III. are characterized by a definite rate and direction of flow of metabolites through them
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: METABOLIC BASIS FOR LIVING (OLD NCERT) |
71%
From NCERT
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An example of a metabolic conversion not catalyzed by an enzyme in a living system will be:
1. formation of a peptide bond
2. carbon dioxide dissolving in water
3. crossing over in meiosis
4. None, as there is no un-catalyzed metabolic conversion in living systems
1. formation of a peptide bond
2. carbon dioxide dissolving in water
3. crossing over in meiosis
4. None, as there is no un-catalyzed metabolic conversion in living systems
Subtopic: METABOLIC BASIS FOR LIVING (OLD NCERT) |
74%
From NCERT
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