MCQOPTIONS
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MCQOPTIONS
This section includes 11 Mcqs, each offering curated multiple-choice questions to sharpen your Enzyme Technology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following is not an example of absolute substrate specificity? |
| A. | Glucose to glucose-6-phosphate by glucokinase |
| B. | Hexokinase phosphorylating one or more kind of hexoses |
| C. | Lactose to glucose and galactose by lactase |
| D. | Urea to ammonia by urease |
| Answer» C. Lactose to glucose and galactose by lactase | |
| 2. |
Which type of specificity is represented in the following reaction?
|
| A. | Relative substrate specificity |
| B. | Absolute substrate specificity |
| C. | Broad substrate specificity |
| D. | Stereo specificity |
| Answer» C. Broad substrate specificity | |
| 3. |
Which of the following do not show stereo specificity? |
| A. | L-lactate dehydrogenase |
| B. | Epimerase |
| C. | Salivary -amylase |
| D. | L-glucose oxidase |
| Answer» C. Salivary -amylase | |
| 4. |
L-lactate dehydrogenase: L-lactic acid:: Salivary -amylase: __________ |
| A. | D-aminoacid |
| B. | L-aminoacid |
| C. | - 1,4 glycoside linkage |
| D. | D-glucose |
| Answer» D. D-glucose | |
| 5. |
Which of these is not an example for stereo specificity? |
| A. | L-lactate dehydrogenase will act only on L-lactic acid, and not D-lactic acid |
| B. | D-glucose oxidase acting only on D-glucose and not L-glucose |
| C. | L-amino oxidase acts only on L-amino acids and not D-aminoacids |
| D. | Hexokinase phosphorylating one or more kind of hexoses |
| Answer» E. | |
| 6. |
Which of the following is an example for broad substrate specificity? |
| A. | Chymotrypsin hydrolyzing peptide bonds attached to aromatic aminoacids |
| B. | D-glucose oxidase acting only on D-glucose and not L-glucose |
| C. | Hexokinase phosphorylating one or more kind of hexoses |
| D. | Lipase hydrolyzes ester bond of lipids |
| Answer» D. Lipase hydrolyzes ester bond of lipids | |
| 7. |
Salivary -amylase cleaving (1 4) glycosidic bond of carbohydrates is an example for which type of specificity? |
| A. | Group specificity |
| B. | Bond specificity |
| C. | Reaction specificity |
| D. | Broad substrate specificity |
| Answer» C. Reaction specificity | |
| 8. |
Which of the following is an example for group specificity? |
| A. | Trypsin hydrolyzing peptide linkages involving arginine or lysine |
| B. | Lipase hydrolyzing ester bond of lipids |
| C. | Hexokinase phosphorylating one or more kind of hexoses |
| D. | L-lactate dehydrogenase will act only on L-lactic acid, and not D-lactic acid |
| Answer» B. Lipase hydrolyzing ester bond of lipids | |
| 9. |
Which of the following is not a part of relative substrate specificity? |
| A. | Group specificity |
| B. | Bond specificity |
| C. | Reaction specificity |
| D. | Broad substrate specificity |
| Answer» D. Broad substrate specificity | |
| 10. |
Which of the following is not a type of specificity? |
| A. | Substrate specificity |
| B. | Reaction specificity |
| C. | Koshland specificity |
| D. | Stereo specificity |
| Answer» D. Stereo specificity | |
| 11. |
Which of the following is not true for the specificity of enzyme action? |
| A. | Specificity refers to discrimination of an enzyme between two competing substrates |
| B. | Specificity of enzymes lies both the reaction they catalyze and the substrates on which they act |
| C. | Specificity makes it possible for a number of enzymes to coexist in the cell without interfering in each other reaction |
| D. | Five types of specificities have been recognized in enzymes |
| Answer» E. | |