Describe. lock and key hypothesis.

Lock and key hypothesis. The hypothesis was put forwarded by Fischer (1894). According to this hypothesis the enzyme and its substrate have a complementary shape. The substrate and the active site of the enzyme have a shape such that the two fit into each other just like a lock and key. As a particular lock can be opened by a particular type of key and a particular enzyme can act on particular substrate due to their specificity, hence the name for the mechanism is given as Lock and Key Mechanism.

Describe. lock and key hypothesis.

Lock and Key Hypothesis of Enzyme Action Complex

 

 

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What is the percentage of nucleic acids in cells ?

5 - 7 percent
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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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Name one monosaccharide which provides energy ?


Glucose
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Name a carbohydrate that can reduce Cu++ to Cu+.

Glucose
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