Look at the graph given below. The reaction rate, of the reaction, can be increased beyond point C by:
1. increasing the amount of substrate
2. adding more water
3. increasing the temperature
4. decreasing enzyme concentration
2. adding more water
3. increasing the temperature
4. decreasing enzyme concentration
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What level of protein organization structure explains the 3-D shape of an enzyme?
| 1. primary structure | 2. tertiary structure |
| 3. secondary structure | 4. quaternary structure |
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Given below is a schematic metabolic pathway. In an experiment, the concentration of enzyme 1 was increased but the concentration of enzymes 2 and 3 were kept constant. What would happen to the rate of production of D?
1. it would go down
2. it would go up
3. it would stay the same
4. it would stop
The graph shown below shows the effect of a certain factor on the rate of a reaction catalyzed by an enzyme. The X-axis would show the said factor and that will be:
| 1. substrate concentration | 2. pH |
| 3. enzyme concentration | 4. temperature |
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In the following graph, the X-axis will show:
1. substrate concentration
2. enzyme concentration
3. pH
4. enzyme concentration or substrate concentration
The rate of enzyme action decreases at higher temperature [after a certain value] because the increased heat
1. changes the pH of the system
2. alters the active site of the enzyme
3. neutralizes the acids and bases in the system
4. increases the concentration of the enzyme
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The "lock and key hypothesis", given be Emil Fischer, attempts to explain the mechanism of:
1. denaturation of enzyme proteins
2. the formation of peptide binds
3. sharing of electrons
4. enzyme specificity
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If an active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:
| 1. D | 2. C |
| 3. A | 4. B |
If an non active-site directed inhibitor is present in the medium, the curve that will represent the progress of the chemical reaction will be shown by the letter:
1. D
2. C
3. B
4. A
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