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प्रश्न
Describe the important properties of enzymes.
उत्तर
Properties of enzymes:
- Enzymes are complex macromolecules with a high molecular weight.
- They catalyse biochemical reactions in a cell. They help in the breakdown of large molecules into smaller molecules or bring together two smaller molecules to form a larger molecule.
- Enzymes do not start a reaction. However, they help accelerate it.
- Enzymes affect the rate of biochemical reactions, not the direction.
- Most of the enzymes have a high turnover number. The turnover number of an enzyme is the number of molecules of a substance that are acted upon by the enzyme per minute. A high turnover number of enzymes increases the efficiency of the reaction.
- Enzymes are specific in action.
- Enzymatic activity decreases with an increase in temperature.
- They show maximum activity at an optimum pH of 5 –7.
- The velocity of enzyme increases with increase in substrate concentration and then, ultimately reaches maximum velocity.
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संबंधित प्रश्न
Define enzymes.
Enzymes that catalyse the interconversion of optical, geometrical, or positional isomers are
What are the factors affecting the rate of enzyme reaction?
____________ refers to enzymes that act at a site far away from the site of its synthesis.
Identify the INCORRECT statement regarding mitochondria.
The word 'enzyme' refers to ______.
Match the enzymes with their respective substrates and choose the correct option.
| Column I | Column II | ||
| i. | pancreatic lipase | a. | Dipeptides |
| ii. | Nucleases | b. | Fats |
| iii. | Lactase | c. | Nucleic acids |
| iv. | Dipeptidases | d. | Lactose |
Which enzyme catalyzes following reaction?
OAA + acetyl-Co-A → Citrate + Co-A
Bile salts bring about emulsification of fats and activate the enzyme ______.
Study the following statements and select correct option.
Statement I: Removal of co-factors from the enzyme disrupts the catalytic activity of the enzyme.
Statement II: Prosthetic groups bound tightly to apoenzymes in order to make them catalytically active.
Glycosidic bonds would be broken under the activity of which enzyme?
NADP is ____________.
Study the following statements with respect to enzymes and select the correct option.
- Most of the enzymes work at an optimum temperature between 20°C and 35°C.
- Enzymes are destroyed at lower temperature of 10-20°C.
- Each enzyme exhibits its highest activity at a specific pH i.e. optimum pH.
The enzymes get denatured ______.
Enzymes can react with acidic or basic substances due to their ______ nature.
What are different classes of enzymes? Explain any two with the type of reaction they catalyse.
Enzymes are different from catalysts in ______.
