Q. No.Which of the following is not a strict macromolecules?
1. Carbohydrates
2. Nucleic acids
3. Proteins
4. Lipids
1. Carbohydrates
The number of correct statements amongst the given statements is:
I. Amino acids are substitute methanes.
II. The R group in serine is hydroxyl-methyl.
III. Arachidonic acid has 20 carbon atoms including the carboxyl carbon.
IV. Glycerol is trihydroxypropane.
V. Lecithin is a phospholipid.
1. 2
2. 3
3. 4
4. 5
The following diagram shows the molecular structure of:
| 1. | A hexose sugar |
| 2. | An aromatic amino acid |
| 3. | A nitrogenous base found in RNA |
| 4. | An important constituent of a DNA nucleotide. |
NAD and NADP are consider as
| 1. | Apoenzyme and cofactor respectively. |
| 2. | Coenzyme and co-factor respectively. |
| 3. | Both as co-enzyme. |
| 4. | Apoenzyme and holoenzyme respectively. |
The Km value of an enzyme denotes the substrate concentration at which the enzyme catalyzed reaction:
| 1. | Reaches Vmax |
| 2. | Shows a decline in the rate of reaction |
| 3. | Attains ½ Vmax |
| 4. | Finally stops |
Identify the given compound:
1. An amino acid
2. A purine base
3. Polysaccharide containing nitrogen
4. Prostaglandin
Inhibition of succinate dehydrogenase by malonate is an example of:
| 1. | Non-competitive inhibition | 2. | Competitive inhibition |
| 3. | Antagonism | 4. | Synergism |
| I: | Small organic molecules |
| II: | Difficult to remove without denaturing the enzyme |
| III: | Haem is an example |
The above characters are of which of the following co-factors of an enzyme?
| 1. | Metal ions | 2. | Prosthetic groups |
| 3. | Co-enzymes | 4. | Apoenzymes |
Which of the following is not true about secondary metabolites?
| 1. | They have direct role in photosynthesis, respiration and reproduction |
| 2. | They act as toxins or pigments or drugs or lectins |
| 3. | Distribution is limited and restricted to special taxonomic group |
| 4. | Organic compound of diverse nature |
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