Q. No.An organic substance bound to an enzyme and essential for its activity is called:
1. coenzyme
2. holoenzyme
3. apoenzyme
4. isoemzyme
Which one of the following is a fat-soluble vitamin and its related deficiency disease?
1. Ascorbic acid - Scurvy
2. Retinol - Xerophthalmia
3. Cobalamine - Beri-Beri
4. Calciferol - Pellagra
The biological organisation starts with:
1. Submicroscopic molecular level
2. Cellular level
3. Organisms level
4. Atomic level
A competitive inhibitor of succinic dehydrogenase is:
| 1. | malonate | 2. | oxaloacetate |
| 3. | α-ketoglutarate | 4. | malate |
| (A) | Easily translocated |
| (B) | Chemically non-reactive |
| (C) | Easily digested by animals |
| (D) | Osmotically inactive |
| (E) | Synthesized during photosynthesis |
The useful properties are:
| 1. | (B) and (C) |
| 2. | (B) and (D) |
| 3. | (A), (C) and (E) |
| 4. | (A) and (E) |
1. pythium
2. Xanthomonas
3. Pseudomonas
4. Saccharomyces
The curve given below shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration) what do the two axis (X and Y) represent?
|
X-axis |
Y-axis |
|
|
(a) |
Temperature |
Enzyme activity |
|
(b) |
Substrate concentration |
Enzyme activity |
|
(c) |
Enzyme activity |
Temperature |
|
(d) |
Enzyme activity |
pH |
1. (a)
2. (b)
3. (c)
4. (d)
Which one out of A-D given below correctly represents the structural formula of the basic amino acid?
| A | B |
.svg) |
.svg) |
| C | D |
.svg) |
.svg) |
| 1. | C | 2. | D |
| 3. | A | 4. | B |
Transition state structure of the substrate formed during an enzymatic reaction is:
1. permanent but unstable
2. transient and unstable
3. permanent and stable
4. transient but stable
The essential chemical components of many coenzymes are:
1. Nucleic acid
2. Carbohydrates
3. Vitamins
4. Proteins
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