Q. No.Which of the following organic compounds is the main constituent of Lecithin?
1.
Arachidonic acid
2.
Phospholipid
3.
Cholesterol
4.
Phosphoprotein
In a typical cell, which of the following constitutes least % of the total cellular mass?
| 1. | Proteins | 2. | Nucleic acids |
| 3. | Carbohydrates | 4. | Lipids |
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 |
Which of the following is not an example of a secondary metabolite produced in living organisms?
| 1. | Lecithin | 2. | Alkaloids |
| 3. | Flavonoids | 4. | Antibiotics |
Chitin, a complex polysaccharide, is found in:
| 1. | Plant cell wall |
| 2. | The exoskeleton of arthropods and cell walls of most fungi |
| 3. | Bacterial cell wall |
| 4. | Cartilage and other connective tissues |
Consider the following enzymes:
I. Catalase
II. Peroxidase
III. Carboxypeptidase
Which of these enzymes require haem as a co-factor for their activity?
| 1. | I only | 2. | I and II only |
| 3. | II and III only | 4. | I, II and III |
The inhibition of succinic dehydrogenase by malonate is an example of:
1. Non-competitive reversible inhibition
2. Non-competitive irreversible inhibition
3. Competitive inhibition
4. Allosteric inhibition
An alpha helix is a:
1. primary structure of a protein
2. secondary structure of a protein
3. tertiary structure of a protein
4. quaternary structure of a protein
Consider the following two statements regarding enzyme action:
| I: | Co-factors play a crucial role in the catalytic activity of the enzyme. |
| II: | Catalytic activity is reduced when the co-factor is removed from the enzyme. |
Of the above statements:
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
The graph shown below shows the effect of a certain factor on the rate of a reaction catalyzed by an enzyme. The X-axis would show the said factor and that will be:
| 1. substrate concentration | 2. pH |
| 3. enzyme concentration | 4. temperature |
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