Q. No.
Which one is correct?
1. Inorganic catalysts work efficiently at high temperature and high pressure while enzymes get damaged at high temperature (above 40°C)
2. Thermophilic organisms living in hot vents and sulphur springs have enzymes that are stable and retain their catalytic power even at high temperature (80 - 90°C)
3. Ribozymes are nucleic acids behaving like enzyme
4. All are correct
Which of the following statements about enzymes is true?
1. Enzymes do not alter the overall change in free energy for a reaction
2. Enzymes are proteins whose three dimensional shape is key to their functions
3. Enzymes speed up reactions by lowering activation energy
4. Enzyme are highly specific for reactions
5. An enzyme like any protein has the secondary and tertiary structure.
6. The energy input needed to start a chemical reaction is called activation energy
1. All are correct
2. All except 5
3. 5 and 6
4. 2 and 4
Which of the following is correct statement
1. Every chemical reaction of metabolism is a catalysed reaction.
2. There is no uncatalysed metabolic conversion in the living system.
3. The proteins with catalytic power are called as enzymes
4. All of these
Which of the following is true?
| 1. | All enzymes are proteins |
| 2. | All proteins are enzymes |
| 3. | Nucleic acids never behave as enzymes |
| 4. | Almost all enzymes are proteins |
Which of the following is true?
1. Almost all enzymes are proteins
2. All enzymes are proteins except ribozymes
3. All enzymes are bio-catalyst
4. All of these
Which of the following is true about carbonic anhydrase?
1. It accelerates the rate of formation of carbonic acid by 10 million times.
2. In its absence only 200 molecules of carbonic acid is formed in an hour.
3. It forms 600,000 molecules of carbonic acid in one second.
4. All of these
Find the correct statement
1. Catalysed reactions proceed at rates higher than that of uncatalysed ones.
2. In skeletal muscle under anaerobic conditions lactic acid is formed from pyruvic acid.
3. In yeast during fermentation ethanol is formed from pyruvic acid.
4. All of these
Which of the following is correct?
1. The chemical or metabolic conversion refers to a reaction.
2. The chemical which is converted into a product is called a substrate.
3. Proteins with three dimensional structures including an active site is called enzyme.
4. All of these
Which of the following is incorrect?
1. The chemical or metabolic conversion refers to a reaction.
2. The chemical which is converted into a product is called an enzyme.
3. Proteins with three dimensional structures including an active site is called enzyme.
4. Enzymes convert a substrate into a product.
© 2026 GoodEd Technologies Pvt. Ltd.