Almost all enzymes are:
| 1. Polysaccharides | 2. Proteins |
| 3. Nucleic acids | 4. Lipids |
In the absence of carbonic anhydrase in the human body, the reaction between carbon dioxide and water leading to the formation of carbonic acid:
| 1. | Will not occur | 2. | Will slow down considerably |
| 3. | Will get faster | 4. | Will remain unaltered |
Which of these can have catalytic activity?
| 1. RNA | 2. DNA |
| 3. Prostaglandins | 4. Sterols |
Enzymes speed up the chemical reactions by:
| 1. | Getting used up in the reaction |
| 2. | Formation of different products |
| 3. | Converting endothermic reactions to exothermic |
| 4. | Lowering activation energy |