Which of the following describes the substrate concentration at which an enzyme-catalyzed reaction achieves half Vmax?
1. Km value
2. Kcat value
3. pKa value
4. Q10
Consider the given two statements
Assertion (A): | In the absence of carbonic anhydrase, carbon dioxide will not react with water to produce carbonic acid. |
Reason (R): | Enzymes are the cause for the reactions to take place. |
1. | Both (A) and (R) are True and (R) correctly explains (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
3. | (A) is True, (R) is False. |
4. | (A) is False, (R) is False. |
I: | is a long-chain polymer of N-acetylglucosamine. |
II: | is a primary component of cell walls in fungi. |
I: | All enzymes are proteins. |
II: | All proteins are enzymes. |
1. | They are primarily involved in growth and development. |
2. | They are essential for the plant's primary metabolic processes. |
3. | They play a key role in the plant's defense mechanisms. |
4. | They are directly involved in photosynthesis. |
Assertion (A): | In competitive enzyme inhibition, the inhibitor binds to the active site of the enzyme, preventing the substrate from binding. |
Reason (R): | Competitive inhibitors structurally resemble the substrate, allowing them to bind reversibly to the active site and reduce the enzyme's activity without affecting the maximal velocity (Vmax) of the reaction. |
1. | Both (A) and (R) are True and (R) correctly explains (A) |
2. | Both (A) and (R) are True and (R) does not correctly explain (A) |
3. | (A) is True, (R) is False |
4. | (A) is False, (R) is True |
I. | Starch | - | Storage of glucose in plants |
II. | Glycogen | - | Storage of glucose in animals |
III. | Cellulose | - | Structural component of plant cell walls |
IV. | Chitin | - | Structural component in fungal cell walls and exoskeletons of insects |
1. | It has no net charge. |
2. | It has a positive and a negative charge at different parts of the molecule. |
3. | It can donate a proton to the surrounding medium. |
4. | It can accept a proton from the surrounding medium. |
Assertion (A): | Glycogen has one reducing end. |
Reason (R): | The reducing end is where non-reducing sugars can be added to the glycogen molecule. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |