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MCQs

Total Questions : 115 | Page 3 of 12 pages
Question 21. All professors are researchers Some scientists are professors Which of the given conclusions is logically valid and is inferred from the above arguments:
  1.    All scientists are researchers
  2.    All professors are scientists
  3.    Some researchers are scientists
  4.    No conclusion follows
 Discuss Question
Answer: Option C. -> Some researchers are scientists


-NA-


Question 22. Phylum proteobacteria is subdivided into α-, β-, ϒ-, δ- and ϵ-proteobacteria based on
  1.    G+C content
  2.    23S rRNA sequences
  3.    tRNA sequences
  4.    16S rRNA sequences
 Discuss Question
Answer: Option D. -> 16S rRNA sequences


-NA-


Question 23. Which one of the following is an ABC transporter?
  1.    multidrug resistance protein
  2.    acetylcholine receptor
  3.    bacteriorhodopsin
  4.    ATP synthase
 Discuss Question
Answer: Option A. -> multidrug resistance protein


-NA-


Question 24. The catalytic efficiency for an enzyme is definedas
  1.    kcat
  2.    vmax/kcat
  3.    kcat/km
  4.    kcat/vmax
 Discuss Question
Answer: Option C. -> kcat/km


-NA-


Question 25. Of the two diploid species, species I has 36 chromosomes and species II has 28 chromosomes. How
many chromosomes would be found in an allotriploid individual?
  1.    42 or 54
  2.    46 or 50
  3.    74 or 86
  4.    84 or 108
 Discuss Question
Answer: Option B. -> 46 or 50


-NA-


Question 26. The RNA primer synthesized during the replication process in bacteria is removed by
  1.    DNA gyrase
  2.    primase
  3.    DNA polymeraseI
  4.    DNA polymerase II
 Discuss Question
Answer: Option C. -> DNA polymeraseI


-NA-


Question 27. A callus of 5 g dry weight was inoculated on semi-solid medium for growth. The dry weight of the
callus was found to increase by 1.5 fold after 10 days of inoculation. The growth index of the
culture is _________
  1.    0.3
  2.    0.5
  3.    0.7
  4.    0.9
 Discuss Question
Answer: Option B. -> 0.5


-NA-


Question 28. A chemostat is operated at a dilution rate of 0.6 h-1. At steady state, the biomass concentration in
the exit stream was found to be 30 g l-1. The biomass productivity (g l-1h-1) after 3h of steady state
operation will be ___________
  1.    3
  2.    9
  3.    18
  4.    27
 Discuss Question
Answer: Option C. -> 18


-NA-


Question 29. A batch bioreactor is to be scaled up from 10 to 10,000 liters. The diameter of the large bioreactor
is 10 times that of the small bioreactor. The agitator speed in the small bioreactor is 450 rpm.
Determine the agitator speed (rpm) of the large bioreactor with same impeller tip speed as that of
the small bioreactor. _________
  1.    45
  2.    40
  3.    50
  4.    55
 Discuss Question
Answer: Option A. -> 45


-NA-


Question 30. Calculate the percentage sequence identity for the pairwise alignment given below. _______ H E L L O “ Y E L L O W
  1.    33.6 to 33.8
  2.    25.9 to 26.1
  3.    54.7 to 54.9
  4.    66.5 to 66.7
 Discuss Question
Answer: Option D. -> 66.5 to 66.7


-NA-


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