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Q. No.Look at the graph given below. The reaction rate 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
| 1. | increasing the amount of substrate |
| 2. | adding more water |
| 3. | increasing the temperature |
| 4. | decreasing enzyme concentration |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
Level 3: 35%-60%
Hints
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 |
Subtopic: Enzymes |
82%
Level 1: 80%+
Hints
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 |
Subtopic: Factors Affecting Enzyme Catalysis Reaction |
78%
Level 2: 60%+
Hints
In the formation of a macromolecule, what type of reaction would join two subunits together?
| 1. | hydrophobic reaction | 2. | hydrolysis reaction |
| 3. | dehydration reaction | 4. | denaturation reaction |
Subtopic: Carbohydrates |
72%
Level 2: 60%+
Hints
During catalytic cycle of an enzyme–
| 1. | Enzyme alter its shape to fit the substrate molecule. |
| 2. | Substrate alter its shape to get fit into the enzyme molecule. |
| 3. | Both enzyme and substrate changes its shape during transition state. |
| 4. | Enzyme and substrate are rigid molecular structure and it never changes its shape. |
Subtopic: Enzyme Catalysis |
59%
Level 3: 35%-60%
Hints
How many statements are false from given information?
| (a) | Ribozymes are enzyme made up of protein. |
| (b) | In every chemical reaction transition state energy is always greater than activation energy. |
| (c) | Co-factors are always proteinous in nature |
| (d) | Enzyme inhibition can not be removed. |
| (e) | Enzyme action can be stopped at low temp. |
| (f) | Km value (Michaelis constant) is the specific concentration of substrate molecule. |
1. 2
2. 3
3. 4
4. 5
Subtopic: Enzymes | Factors Affecting Enzyme Catalysis Reaction |
51%
Level 3: 35%-60%
Hints
Select the option which is incorrect for enzyme catalase.
| 1. | The cofactor present is inorganic and proteinaceous in nature |
| 2. | Haem is the prosthetic group required by the enzyme |
| 3. | The cofactor required for optimal activity must be tightly bound to the apoenzyme |
| 4. | It catalyses breakdown of hydrogen peroxide to water and oxygen |
Subtopic: Enzymes Classification |
63%
Level 2: 60%+
Hints
Select the correct statement
| 1. | The base pairs in DNA are stacked 0.34 nm apart |
| 2. | The diameter of a right handed helical ds B-DNA molecules is 34 |
| 3. | Sugar-phosphate and hydrogen bonds are both present in a single nucleotide such as AMP |
| 4. | A and T of one strand compulsorily base pair with G and C respectively, of other strand is DNA |
Subtopic: The DNA |
62%
Level 2: 60%+
Hints
An example of protein with quaternary structure is
1. Myoglobin
2. Hemoglobin
3. Keratin
4. All of these
Subtopic: Proteins |
69%
Level 2: 60%+
Hints
Enzymes catalyse biochemical reactions by
| 1. | Lowering the activation energy | 2. | Increasing the activation energy |
| 3. | Establishing stable bonds with substrate | 4. | Increasing temperature |
Subtopic: Enzyme Catalysis |
89%
Level 1: 80%+
Hints
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