MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Identify the correct statement about enzymes. |
| A. | Enzymes increase the activation energy of a reaction |
| B. | Enzymes need to be used in excess compared to the reagent to catalyse the reaction |
| C. | Enzymes work only at their optimum temperature and pH |
| D. | The activity of enzymes cannot be affected by other compounds |
| Answer» D. The activity of enzymes cannot be affected by other compounds | |
| 2. |
Albinism is caused by the deficiency of which enzyme? |
| A. | Phenylalanine hydroxylase |
| B. | Streptokinase |
| C. | Prolidase |
| D. | Tyrosinase |
| Answer» E. | |
| 3. |
The prosthetic groups which get attached to the enzyme at the time of reaction are called _____ |
| A. | cofactors |
| B. | coenzymes |
| C. | messengers |
| D. | inhibitors |
| Answer» C. messengers | |
| 4. |
The hydrolysis of lactose can be catalysed only by the enzyme lactase. Also, lactase is only able to work on lactose and no other compound. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Enzymes reduce the magnitude of activation energy for a reaction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 6. |
Cellulose is not digestible by humans due to the absence of which of the following enzymes? |
| A. | Amylase |
| B. | Urease |
| C. | Cellulase |
| D. | Invertase |
| Answer» D. Invertase | |
| 7. |
Enzymes are basically ______ |
| A. | polysaccharides |
| B. | sugars |
| C. | polypeptides |
| D. | pyrimidine bases |
| Answer» D. pyrimidine bases | |
| 8. |
Enzymes are regarded as ______ |
| A. | biocatalysts |
| B. | messengers |
| C. | inhibitors |
| D. | antibodies |
| Answer» B. messengers | |
| 9. |
Which of the following is a substrate specific enzyme? |
| A. | Maltase |
| B. | Carboxylase |
| C. | Hexokinase |
| D. | Carbonic anhydrase |
| Answer» B. Carboxylase | |
| 10. |
The enzyme which catalyses the conversion of proteins to amino acids is ______ |
| A. | invertase |
| B. | urease |
| C. | nuclease |
| D. | protease |
| Answer» E. | |
| 11. |
Enzymes are generally named after the ________ |
| A. | compound on which they work |
| B. | compound which they form as product |
| C. | medium in which they act |
| D. | place from where they are derived |
| Answer» B. compound which they form as product | |
| 12. |
Which of the following best describes a particular enzyme? |
| A. | Chemical catalyst |
| B. | Fibrous protein |
| C. | Highly selective |
| D. | Can be used for various reactions |
| Answer» D. Can be used for various reactions | |