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Biotechnology SET MCQ Questions 31-40

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

SET BIOTECHNOLOGY MCQ - PG LEVEL QUESTIONS AND ANSWERS

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 

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