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Quiz 117
Mdcat-past-papers Quiz
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2321. Activation of all of the following enzymes need a regulatory molecule except:
Pepsinogen
Erypsin
Chymotrypsinogen
trypsinogen
2322. Enzyme catalase protects the plants cell from:
Dehydration
Photorespiration
Toxic effect of alcohol
Protein loss metabolism
2323. Enzymes increase the rate of reaction by:
Increasing temperature
Decreasing pH
Decreasing activation energy
Increasing activation energy
2324. Optimum pH for the working of pancreatic lipase is:
4.5
7.6
2
9
2325. Pepsin, protein digesting enzyme sets best pH:
3
4.5
2
6
2326. Most enzymes have an optimum temperature of around
30
40
50
20
2327. The temperature that promote the maximum activity of enzyme is referred as :
Fixed temperature
Optimum temperature
Controlled temperature
Active temperature
2328. What is the best physiological pH for optimum functioning for most of the cellular enzymes of human?
2-3pH
3-5 pH
6-8 pH
8-10 pH
2329. The enzyme which can work on pH 7 of the medium is?
Pepsin
Chymotrypsin
Trypsin
Pancreatic lypase
2330. Which of the following statement is incorrect regarding state of enzymatic action:
Increase in enzyme concentration increases the rate
Increase in enzyme concentration reduces the rate
All enzymes work at their maximum rate at optimum temperature
All enzymes work at their maximum rate at optimum pH
2331. At equilibrium, a scientist added more substrate and observed and increase in the rate of the reaction which soon declined. He added some more substrate but this time the rate of the reaction remain unaffected. What was the reason
Enzyme did not function
Feedback due to accumulatioin of the end product
Enzyme was more than substrates active site
substrate did not functon
2332. Most enzymes have an optimum temperature of around
30
40
50
20
2333. In term of enzyme action maximum temperature refers to a temperature at which:
Enzyme start to denature
Enzymes start to re-nature
Enzymes work best
Enzymes are reactivated
2334. Which property of enzyme is helpful to carry out metabolic activities at room temperature?
Not sensitivity to pH
Does not change the speed of reaction
Highly specific
Required in large quantities
2335. What is "Flavin adenine dinucleotide"?
Catalyst
Coenzyme
Cofactor
Enzyme
2336. Adding more substrates will NOT make a difference to the enzyme catalyzed reaction:
When few enzyme molecules are left unsaturated
When substrate cools down
When substrate heats up
When many enzyme molecules are left
2337. Optimum pH for pancreatic lipase is:
2
4
6
8
2338. Catalase can be activated at pH:
2
6
9
7
2339. The enzymes enable the conversion of substrates into products by:
Changing equilibrium in the direction of the substrate
Increasing the activation energy
Increasing the substrate concentration
Lowering the activation energy
2340. Most enzymes have optimum temperature of around:
30°C
40°C
50°C
20°C
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