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Biomolecules

Short Answer Type

141.

Describe lock and key hypothesis.

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142. Find out how much cellulose is made by all the plants in the biosphere and compare it with how much of paper is manufactured by man and hence what is the consumption of plant material by man annually. What is the loss of vegetation.

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143. Describe induced fit hypothesis.

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144. Define hormone.

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145. Name the various classes of enzymes.

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Long Answer Type

146. Describe the various factors which affect enzymatic reactions.

The following factors affect the enzymatic reactions.

1. Temperature. Enzymes work at optimum temperature. Very high or very low temperatures decreases the activity of enzymes.

Effect of temperature on enzymatic reaction

Describe the various factors which affect enzymatic reactions.

2. Effect of pH value on enzyme reaction - The enzymes are very sensitive towards any changes in the pH of the medium. A particular enzyme can react only at specific pH.

3. Effect of substrate (S) concentration on velocity of reaction- Enzyme activity increases with an increase in concentration of the substrate to a maximum and then it falls off.

4. Binding of specific chemicals - Activators enhance the activity of the enzymes whereas inhibitors decrease the activity of enzymes.

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