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 2010 Mains
MCQ (Single Correct Answer)
+4
-1
The figure given below shows the conversion of a substate into product by an enzyme. In which one of the four options (a-d) the components of reaction labelled as A, B, C and D are identified correctly?
A
A
B
C
D
Potential energy
Transition state
Activation energy
Activation energy with out enzyme
B
A
B
C
D
Transition state
Potential energy
Activation energy without enzyme
Activation energy with enzyme
C
A
B
C
D
Potential energy
Transition state
Activation energy with enzyme
Activation energy without enzyme
D
A
B
C
D
Activation energy with enzyme
Transition state
Activation energy without enzyme
Potential energy
3
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Read the following four statements, (i), (ii), (iii) and (iv) and select the right opening having both correct statement.
Statements : (i) Z scheme of light reaction takes place in presence of PSI only.
(ii) Only PSI is functional in cyclic photophosphorylation.
(iii) Cyclic photophosphorylation results into synthesis of ATP and NADPH2.
(iv) Stroma lamellae lack PSII as well as NADP.
A
(ii) and (iv)
B
(i) and (ii)
C
(ii) and (iii)
D
(iii) and (iv).,
4
AIPMT 2010 Mains
MCQ (Single Correct Answer)
+4
-1
Kranz anatomy is one of the characteristics of the leaves of
