1
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Three of the following statements about enzymes are correct and one is wrong. Which one is wrong?
A
Enzymes require optimum pH for maximal activity.
B
Enzymes are denaturated at high temperature but in certain exceptional organisms they are effective even at temperatures 80o - 90oC.
C
Enzymes are highly specific.
D
Most enzymes are proteins but some are lipids.
2
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Modern detergents contain enzyme preparations of
A
thermoacidophiles
B
thermophiles
C
acidophiles
D
alkaliphiles.
3
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
A competitive inhibitor of succinic dehydrogenase is
A
$$\alpha $$-ketoglutarate
B
Malate
C
malonate
D
oxaloacetate.
4
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
Carbohydrates are commonly found as starch in plants storage organs. Which of the following five properties of starch (1 $$-$$ 5) make it useful as a storage material?
(1)  Easily translocated
(2)  Chemically non-reactive
(3)  Easily digested by animals
(4)  Osmotically inactive
(5)  Synthesized during photosynthesis
The useful properties are
A
(1), (3) and (5)
B
(1) and (5)
C
(2) and (3)
D
(2) and (4).

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