Enzymes — Biology MCQs (Class 11)
Free chapter-wise Biology MCQs with answers for MDCAT, FSc and entry tests.
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#1 Which of the following is an inactive enzyme without cofactor?
A) Coenzyme
B) Apoenzyme
C) Holoenzyme
D) Denatured enzyme
Answer: B
#2 The optimum temperature for enzymes in human body
A) 30° C
B) 35° C
C) 37° C
D) 39° C
Answer: C
#3 Apoenzyme is
A) Aminoacid
B) Protein
C) Cofactor
D) C--enzyme
Answer: B
#5 Coenzyme are the derivation of
A) Proteins
B) Vitamins
C) Hormones
D) Lipids
Answer: B
#6 All the enzymes are cheimically
A) Lipids
B) Nucleic acids
C) Proteins
D) Vitamins
Answer: C
#7 The optimum pH for amylase to work is
A) 2
B) 4.5
C) 5.5
D) 6.8
Answer: D
#8 According to induced fit model of koshland, the active site of enzyme is
A) Rigid
B) Flexible
C) Triangular
D) Stable
Answer: B
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