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Q. No.Select the correct match from among the following:
1. Collagen – Intracellular ground substance
2. Toxin – Codeine
3. Lectin – Ricin
4. Alkaloid – Morphine
Subtopic: Primary & Secondary Metabolites |
72%
Level 2: 60%+
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Select the incorrect statement among the following:
| 1. | Palmitic acid has 16 carbons including carboxyl carbon. |
| 2. | Lipids are not polymers but they are assembled from smaller molecules by dehydration. |
| 3. | Arachidonic acid has 20 carbon atoms including carboxyl carbon. |
| 4. | Lecithin is an example of phospholipid found in neural tissues but absent in cell membrane. |
Subtopic: Lipids |
82%
Level 1: 80%+
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If the enzyme commission number of an enzyme is 2.7.1.1 then it catalyse which of the following reaction?
1. \(\mathrm{AB}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{AH}+\mathrm{BOH}\)
2.
3. \(S-G+S^{\prime} \rightarrow S+S^{\prime}-G\)
4. Alcohol + NAD → Aldehyde + NADH2
1. \(\mathrm{AB}+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{AH}+\mathrm{BOH}\)
2.
3. \(S-G+S^{\prime} \rightarrow S+S^{\prime}-G\)
4. Alcohol + NAD → Aldehyde + NADH2
Subtopic: Enzymes Classification |
62%
Level 2: 60%+
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Read the given statements and choose the incorrect one:
| 1. | Oils generally have lower melting point than fats. |
| 2. | Percentage of total cellular mass of carbohydrates is higher than that of nucleic acids. |
| 3. | Relative abundance of carbon and hydrogen with respect to other elements is higher in any living organism than in the earth’s crust. |
| 4. | Abrin and ricin are toxins. |
Subtopic: Introduction | Lipids: Fatty Acids | Primary & Secondary Metabolites |
76%
Level 2: 60%+
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B-DNA is the most common form of DNA having all the following salient features except
| 1. | The pitch would be 34 Å |
| 2. | The strand turns 36° at each step of ascent |
| 3. | The rise per base pair is 3.6 Å |
| 4. | One full turn of helical strand involves 10 base pairs |
Subtopic: Nucleic Acid | The DNA |
67%
Level 2: 60%+
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Match column I with column II and select the correct option.
1. a(ii), b(iii), c(iv), d(i)
2. a(ii), b(iv), c(iii), d(i)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(i), c(iii), d(ii)
| Column I | Column II | ||
| a. | Phosphate and hydroxyl group of sugar in a nucleotide | (i) | Peptide bond |
| b. | Polymer of amino acids | (ii) | Glycosidic bond |
| c. | Polysaccharides | (iii) | Hydrogen bond |
| d. | Adenine and thymine in a DNA | (iv) | Ester bond |
2. a(ii), b(iv), c(iii), d(i)
3. a(iv), b(i), c(ii), d(iii)
4. a(iv), b(i), c(iii), d(ii)
Subtopic: The DNA | Amino Acids | Zwitter ion & Peptide Bond | Carbohydrates: Glycosidic Bond & Disaccharide |
87%
Level 1: 80%+
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Read the statements A and B carefully and select the correct answer.
| Statement A: | Enzyme-substrate complex produced during a catalysed reaction is highly reactive. |
| Statement B: | This complex dissociates into its product and changed enzyme with an intermediate formation of enzyme-product complex. |
| 1. | Both statements A and B are correct |
| 2. | Both statements A and B are incorrect |
| 3. | Only statement A is correct |
| 4. | Only statement A is incorrect |
Subtopic: Enzymes | Enzyme Catalysis |
Level 3: 35%-60%
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Subtopic: Nucleic Acid: Nucleotides |
63%
Level 2: 60%+
NEET - 2013
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Which of the following statements about enzymes is wrong?
| 1. | Enzymes are denatured at high temperatures |
| 2. | Enzymes are mostly proteins but some are lipids also |
| 3. | Enzymes are highly specific. |
| 4. | Enzymes require optimum pH and temperature for maximum activity. |
Subtopic: Enzymes |
85%
Level 1: 80%+
NEET - 2013
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Assertion(A): Amino acids can be essential or non-essential.
Reason(R): Dietary proteins are the source of non-essential proteins.
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. (A) is false, but (R) is true.
Reason(R): Dietary proteins are the source of non-essential proteins.
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. (A) is false, but (R) is true.
Subtopic: Different Amino Acids |
81%
Level 1: 80%+
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