Q. No.Even in the presence of malonate, the velocity of the reaction catalyzed by the enzyme succinic dehydrogenase can be increased by:
1. increasing the temperature beyond 400C
2. decreasing the pH
3. increasing the concentration of succinate
4. decreasing the production of ATP by chemiosmosis
1. increasing the temperature beyond 400C
2. decreasing the pH
3. increasing the concentration of succinate
4. decreasing the production of ATP by chemiosmosis
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Chitin is a long chain polymer of:
| 1. | N-acetyl glucosamine | 2. | N-acetyl galactosamine |
| 3. | Beta glucose | 4. | Alpha glucose |
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Identify the incorrect statement regarding enzyme action:
1. Formation of [Enzyme Substrate] complex is obligatory
2. Enzymes speed up a chemical reaction by lowering the requirement of activation energy
3. Substrate need not go through a transition state if the enzyme catalyzed reaction is endothermic
4. Enzymes are themselves not used up in the chemical reaction catalyzed by them
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Identify the incorrectly matched pair:
| 1. | Lecithin | Phospholipid |
| 2. | Aromatic amino acid | Threonine |
| 3. | Cytidine | Nucleoside |
| 4. | Trihydroxy propane | Glycerol |
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Each step of ascent of a strand of DNA:
I. is represented by a pair of bases
II. the strand turns 360
III. the rise per base pair is 3.4 nm
1. Only II is correct
2. Only I and II are correct
3. only II and III are correct
4. I, II and III are correct
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In a typical cell, which of the following constitutes least % of the total cellular mass?
| 1. | Proteins | 2. | Nucleic acids |
| 3. | Carbohydrates | 4. | Lipids |
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Identify the incorrect pair.
| 1. | Lectins - Concanavalin A | 2. | Drugs - Ricin |
| 3. | Alkaloids - Codeine | 4. | Toxin - Abrin |
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Identify the substances having a glycosidic bond and peptide bond, respectively in their structure:
| 1. | Glycerol, trypsin | 2. | Cellulose, lecithin |
| 3. | Inulin, insulin | 4. | Chitin, cholesterol |
Prosthetic groups differ from co-enzymes in that
1. they require metal ions for their activity.
2. they (prosthetic groups) are tightly bound to apoenzymes.
3. their association with apoenzymes is transient.
4. they can serve as co-factors in a number of enzyme-catalyzed reactions.
Which of the following organic compounds is the main constituent of Lecithin?
| 1. | Arachidonic acid | 2. | Phospholipid |
| 3. | Cholesterol | 4. | Phosphoprotein |
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