31. The absorption coefficient of a protein at 600nm is 12000 M-1 cm-1 . What is the absorbance of 1mg/ml (4.5 X 10-5 M) solution across a 1-cm path length?
A) 0.870 B)
0.720 C) 0.540 D) 0.420
32. Assertion(A): Phosphoenolpyruvate
has a high phosphoryl-transfer potential
Reason (R) : The phosphoryl group
traps the molecule in its unstable enol form
A) A and R
are correct and R is the reason for A
B) A is
correct and R is wrong
C) A is
wrong but R is correct
D) A and R
are wrong
33. If glucose is labelled with 14C
at C-6, where we can find the radioactive label after oxidative phase of
pentose phosphate pathway
A) C-2 of ribulose 5- phosphate
B) C-1 of ribulose 5- phosphate
C) C-5 of ribulose 5- phosphate
D) C-6 of ribulose 5- phosphate
34. Assertion (A) : Treatment of
carbonic anhydrase with high concentrations of EDTA results in loss of enzyme activity
Reason(R) : EDTA will bind and remove
Mg2+, which is required for Carbonic anhydrace enzyme activity
A) A and R
are true and R is the reason for A
B) A and R
are true and R is not the reason for A
C) A is true
but R is false
D) A and R
are false
35. Choose the correct statements
about noncompetitive inhibition of enzymes
1) An
inhibitor and a substrate can bind simultaneously to an enzyme
2) KM is
unchanged
3) Can be
overcome by increasing the substrate concentration
4) Vmax is
increased
A) Only 1,3 & 4 are correct
B) Only 1 & 2 are correct
C) Only 1 & 4 are correct
D) Only 1, 2 & 4 are correct
36. Psychrophiles are organisms that
grow at:
A) high salt concentration
B) high sugar concentration
C) low temperature
D) low humidity
37. Vesicular-Arbuscular Mycorrhizae(VAM) is found in ------.
A) Plant
roots
B) Tooth
lichens
C) AIDS and
other immunodeficiency conditions
D)
Phylloplane
38. Which of the following is a
tissue specific macrophage?
A) Osteoclasts B) Osteoblasts C) Melanocytes D) Dendritic cells
39. The Papain enzyme digestion of IgG will yield:
A) Two Fab
fragments and one Fc fragment
B) One Fab
fragment and two Fc fragments
C) One Fab
fragment and one Fc fragment
D) Two heavy
chains and two light chains
40. A complete virus particle,
consisting of one or more molecules of DNA or RNA enclosed in a coat protein,
is called a ------.
A) Viroid B)
Virion C) Virusoid D) Prion
Answers:
31. C) 0.540
32. A) A and R are correct and R is the reason for A
33. C) C-5 of ribulose 5- phosphate
34. C) A is true but R is false
35. B) Only 1 & 2 are correct
36. C) low temperature
37. A) Plant roots
38. A) Osteoclasts
39. A) Two Fab fragments and one Fc fragment
40. B) Virion
