Q. No.Which one of the following biomolecules is correctly characterised?
1.
Palmitic acid - an unsaturated fatty acid with 18 carbon atoms
2.
Adenylic acid - adenosine with a glucose phosphate molecule
3.
Alanine amino acid - Contains an amino group and an acidic group anywhere in the molecule
4.
Lecithin - a phosphorylated glyceride found in the cell membrane
The figure given below shows the conversions of a substrate into product by an enzyme. In which one of the four options (1-4), the components of the reaction labelled as A, B, C and D are identified correctly:
Options
| A | B | C | D | |
| 1. | Transition state |
Potential energy |
Activation energy without enzyme |
Activation energy with enzyme |
| 2. | Potential energy |
Transition state |
Activation energy with enzyme |
Activation energy without enzyme |
| 3. | Activation energy with enzyme |
Transition state |
Activation energy without enzyme |
Potential energy |
| 4. | Potential energy |
Transition state |
Activation energy without enzyme |
Activation energy with enzyme |
Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?
| 1. | Enzymes are denatured at high temperatures but in certain exceptional organisms they are effective even at temperatures 80º - 90ºC |
| 2. | Enzymes are highly specific |
| 3. | Most enzymes are proteins but some are lipids |
| 4. | Enzymes require optimum pH for maximal activity |
| 1. | Tissue (X) secretes RNA which changes the development of tissue (Y) |
| 2. | As tissue (X) develops, it secretes enzymes that inhibit the development of tissue (Y) |
| 3. | As tissue (X) develops, it secretes something that induces tissue (Y) to develop |
| 4. | As tissues (X) develops, it secretes something that shows down the growth of tissue (Y) |
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| 1. | Enzymes are denatured at high temperatures |
| 2. | Enzymes are mostly proteins but some are lipids also |
| 3. | Enzymes are highly specific. |
| 4. | Enzymes require optimum pH and temperature for maximum activity. |
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
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