Enzymes

Q. The ‘lock and key’ model of enzyme action illustrates that a particular enzyme molecule

1. may be destroyed and resynthesised several times
2. interacts with a specific type of substrate molecule
3. reacts at identical rates under all conditions
4. forms a permanent enzyme-substrate complex

Q. Which of the following is an example for competitive inhibition?

1. Succinic dehydrogenase by malonic acid
2. Cytochrome oxidase by cyanide
3. Hexokinase by glucose-6-phosphate
4. Carbonic anhydrase by carbon dioxide

Q. The enzyme part, which combines with non-protein part to form a functional enzyme, is known as

1. coenzyme
2. holoenzyme
3. apoenzyme
4. prosthetic group

Q. Which enzyme is useful as colour brightening agent in detergent industry?

1. Amylase
2. Lipase
3. Protease
4. Cellulase

Q. The enzyme part, which combines with non-protein part to form a functional enzyme, is known as

1. coenzyme
2. holoenzyme
3. apoenzyme
4. prosthetic group