The non protein constituent present in many enzymes is called:
| 1. Co-enzyme | 2. Co-factor | 
| 3. Apoenzyme | 4. Holoenzyme | 
Haem in hemoglobin:
| 1. | is loosely bound | 
| 2. | is the co-enzyme | 
| 3. | is the prosthetic group | 
| 4. | has no influence on activity of Hb | 
What is the co-factor for the proteolytic enzyme, carboxypeptidase?
| 1. | Molybdenum | 2. | Manganese | 
| 3. | Zinc | 4. | Copper | 
Most of the coenzymes contain:
| 1. Metal ions | 2. FMN and FAD | 
| 3. Ribonucleoproteins | 4. Vitamins | 
The metal ion that acts as a co-factor for both alcohol dehydrogenase and carbonic anhydrase is:
| 1. | Magnesium | 2. | Iron | 
| 3. | Zinc | 4. | Nickel | 
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
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 |