Which of the following is not a secondary metabolite?
1.
Curcumin
2.
Morphine
3.
Anthocyanin
4.
Lecithin
Subtopic: Primary & Secondary Metabolites |
70%
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NEET - 2023
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Match List - I with List - II
Choose the correct answer from the options given below:
| List-I | List-II | ||
| (A) | Terpenoids | (I) | Codeine |
| (B) | Unsaturated fatty acid | (II) | Diterpenes |
| (C) | Nucleic acid | (III) | Ricin |
| (D) | Polysaccharide | (IV) | Concanavalin A |
| Options: | (A) | (B) | (C) | (D) |
| 1. | II | IV | III | I |
| 2. | II | I | IV | III |
| 3. | II | III | I | IV |
| 4. | II | IV | I | III |
Subtopic: Primary & Secondary Metabolites |
NEET - 2023
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NEET 2025 - Target Batch
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If the % weight of elements in Earth’s crust and human body are compared, all the following will have a higher % composition in human body except:
1. Carbon
2. Oxygen
3. Nitrogen
4. Calcium
1. Carbon
2. Oxygen
3. Nitrogen
4. Calcium
Subtopic: Introduction |
58%
From NCERT
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The nitrogenous base shown in the given figure is:
| 1. | Adenine | 2. | Guanine |
| 3. | Cytosine | 4. | Thymine |
Subtopic: Element Analysis |
87%
From NCERT
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The use of sulpha drugs used to slow down the growth of bacterial colonies is based on the principle of:
1. antigen-antibody interaction
2. competitive inhibition
3. allosteric feedback inhibition
4. mutagenesis
1. antigen-antibody interaction
2. competitive inhibition
3. allosteric feedback inhibition
4. mutagenesis
Subtopic: Enzyme Inhibition |
84%
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The number of types of units present in the structure of adult human hemoglobin is/are:
1. 1
2. 2
3. 3
4. 4
1. 1
2. 2
3. 3
4. 4
Subtopic: Introduction to Proteins |
52%
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:
| Secondary metabolites | Class | ||
| A. | Vinblastine | P. | Polymeric substances |
| B. | Concanavalin A | Q. | Drugs |
| C. | Rubber | R. | Toxins |
| D. | Ricin | S. | Lectins |
Codes:
| A | B | C | D | |
| 1. | R | S | P | Q |
| 2. | Q | S | P | R |
| 3. | Q | P | R | S |
| 4. | P | Q | R | S |
Subtopic: Primary & Secondary Metabolites |
89%
From NCERT
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Consider the given two statements:
| Assertion (A): | In solutions of different pH, the structure of amino acids changes. |
| Reason (R): | A particular property of amino acids is the ionizable nature of –NH2 and –COOH groups. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | (A) is True but (R) is False. |
| 3. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 4. | (A) is False but (R) is True. |
Subtopic: Amino Acids |
83%
From NCERT
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Tyrosine, phenylalanine and tryptophan are all:
1. Acidic amino acids
2. Sulphur containing amino acids
3. Essential amino acids
4. Aromatic amino acids
1. Acidic amino acids
2. Sulphur containing amino acids
3. Essential amino acids
4. Aromatic amino acids
Subtopic: Amino Acids |
91%
From NCERT
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The true macromolecular fraction of any living tissue or cell includes all the following except:
| 1. | polynucleotides | 2. | lipids |
| 3. | polysaccharides | 4. | polypeptides |
Subtopic: Element Analysis |
89%
From NCERT
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