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Quiz 116
Mdcat-past-papers Quiz
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2301. Many enzymes are secreted in inactive form to protect:
Mitochondria
Cell DNA
Cell membrane
Vacuole
2302. All of the following are the postulates of lock and key model, EXCEPT?
Active site has a rigid structure
Enzymes are non regulatory
One specific key can only open specific lock
Substrates combines with an enzyme to induces change in enzyme structure
2303. Most of the coenzymes are the derivatives of:
Lipid
Minerals
Steroids
Waxes
2304. Enzymes are __________ in nature
Proteins
Lipds
Carbohydrates
Vitamins
2305. Which of the following is an example of hydrolase.
Transmethylase
Oxygenases
Peroxidase
Phosphatase
2306. The coenzyme NAD is made up of:
Amino acids
Vitamins
Nucleotides
Sugar
2307. What alters the shape of enzymes and makes them functional?
Co-factor
Proteins
Other enzymes
A and C
2308. What happens to the enzyme after an enzyme catalyzed reaction
Reduced to inactive form
Changes into substrate
become inert
used for another reaction
2309. Lock and key model for enzyme action proposed by Emil Fischer suggests that:
enzymes are unbiased for substrate
Enzymes can modify their active site
Enzymes are restricted to one reaction
An enzyme can catalyze variety of reaction
2310. Enzyme works by lowering the ___ of the reaction they catalyze:
Kinetic energy
Activation energy
Heat energy
Potential energy
2311. Koshland gave induced fit model in:
1959
1890
1949
1880
2312. Which of the following is true about ATP?
Coenzyme
Prosthetic group
Enzyme
organic ion of enzyme
2313. Optimum pH of salivary amylase is:
6.8
7.6
2
9.6
2314. Lactase converts lactose into:
Glucose
Fructose
Galactose
Glucose and galactose
2315. Coenzyme requires:
Vitamins
Proteins
Fats
Carbohydrates
2316. Non protein but inorganic detachable co-factor is called:
Activator
Prosthetic group
Co-enzyme
Apo-enzyme
2317. Which of the following enzyme dose not need co-factor?
Hexokinase
Pepsin
Alcohol dehydrogenase
Carbonic anhydrase
2318. Which enzyme works in alkaline pH?
Pepsin
Sucrose
enterokinase
Pancreatic lipase
2319. Which type of enzyme would be most active in your gut after eating the loaf of bread?
Amylase
Erypsin
Lactase
carboxypeptidase
2320. An Enzyme is capable of acting on a wide range of related substances. Which of the following is a property of this enzyme?
Inflexible active site
Regulatory Enzyme
Non-regulatory enzyme
Highly specific Enzyme
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