Basic Principles of Biotechnology MCQ Questions & Answers

41.
Phase contrast microscope takes advantage of

A. Density of different parts of a cell

B. Volume of a cell

C. Size of nucleus

D. None of the above

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42.
Measurement of K_La in a bioreactor can be carried out by sodium sulfite oxidation method, that is, based on the oxidation of sodium sulfite to sodium sulfate in the presence of a catalyst (Cu⁺⁺ or Co⁺⁺). In a typical experiment, a laboratory fermenter was filled with 5 liter of 0.5 M sodium sulfite solution containing 0.003 M Cu⁺⁺ ions and the air was sparged in. After 10 min, the air flow was stopped and a 10 mL sample was taken and titrated. The concentration of sodium sulfite in the sample was found to be 0.20 M. The oxygen uptake rate for this aerated system will work out to be

A. 0.08 g L^-1 s^-1

B. 0.008 g L^-1 s^-1

C. 0.8 g L^-1 s^-1

D. None of the above

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43.
In a well aerated and agitated microbial culture, the 'supply' of oxygen is equal to 'demand' (uptake) of the growing culture. The K_La for such a system will be (K_La = volumetric mass transfer coefficient, C* = dissolved oxygen concentration in liquid in equilibrium with gaseous oxygen, C = instantaneous value of dissolved oxygen concentration, 'r' = specific oxygen uptake rate per unit weight of cells, X = dry weight of the cells per unit volume)

A. $$\frac{{\left( {rX} \right)}}{{\left( {C* - C} \right)}}$$

B. $$\frac{{\left( r \right)}}{{X\left( {C* - C} \right)}}$$

C. $$\frac{{\left( {C* - C} \right)}}{{\left( {rX} \right)}}$$

D. $$\frac{{\left( X \right)}}{{r\left( {C* - C} \right)}}$$

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44.
Glycogen is a branched polymer of glucose It has

A. No reducing ends

B. No non-reducing ends

C. One reducing end and several non-reducing ends

D. One non-reducing end and several reducing ends

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45.
Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below.

Which one of the following options is correct?

A. I-Newtonian, II-Bingham plastic, III-Dilatant, IV-Pseudoplastic

B. I-Pseudoplastic, II-Dilatant, III-Newtonian, IV-Bingham plastic

C. I-Newtonian, II-Pseudoplastic, III-Bingham plastic, IV-Dilatant

D. I-Newtonian, II-Bingham plastic, III-Pseudoplastic, IV-Dilatant

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46.
If the frequency of males affected with an X-linked recessive condition in a human population is 0.10 (one in ten), what will be the expected frequency of affected females?

A. 0.0001

B. 0.001

C. 0.02

D. 0.01

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47.
Power number also called Newton's number, is defined as a dimensionless parameter relating to

A. Turbulent flow

B. The relative velocity between the nutrient solution and individual cells

C. Energy required by the stirred reactors

D. None of the above

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48.
In the meiosis type cell division, chromatids segregates during

A. Never divides

B. Anaphase I

C. Interkinesis

D. Anaphase II

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49.
Binding of mannose 6-Phosphate to protein lead to its localization to

A. Lsosome

B. Golgi body

C. Plasma membrane

D. Nucleus

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50.
In mammalian cells, RNA editing
P. Can change the coding capacity of a gene after transcription
Q. Creates a stop codon in the middle of the apo-B mRNA in intestinal cells but not in liver cells
R. Usually makes many changes in each mRNA
S. Can change specific nucleotides by deamination

A. P, Q

B. P, R

C. P, Q, S

D. Q, R, S

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Basic Principles of Biotechnology MCQ Questions & Answers | Biotechnology

41. Phase contrast microscope takes advantage of

Answer & Solution

Answer & Solution

Answer & Solution

44. Glycogen is a branched polymer of glucose It has

Answer & Solution

45. Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below. Which one of the following options is correct?

Answer & Solution

46. If the frequency of males affected with an X-linked recessive condition in a human population is 0.10 (one in ten), what will be the expected frequency of affected females?

Answer & Solution

47. Power number also called Newton's number, is defined as a dimensionless parameter relating to

Answer & Solution

48. In the meiosis type cell division, chromatids segregates during

Answer & Solution

49. Binding of mannose 6-Phosphate to protein lead to its localization to

Answer & Solution

50. In mammalian cells, RNA editing P. Can change the coding capacity of a gene after transcription Q. Creates a stop codon in the middle of the apo-B mRNA in intestinal cells but not in liver cells R. Usually makes many changes in each mRNA S. Can change specific nucleotides by deamination

Answer & Solution

41.
Phase contrast microscope takes advantage of

44.
Glycogen is a branched polymer of glucose It has

45.
Shear stress versus shear rate behavior of four different types of fluids (I, II, III and IV) are shown in the figure below.

Which one of the following options is correct?

46.
If the frequency of males affected with an X-linked recessive condition in a human population is 0.10 (one in ten), what will be the expected frequency of affected females?

47.
Power number also called Newton's number, is defined as a dimensionless parameter relating to

48.
In the meiosis type cell division, chromatids segregates during

49.
Binding of mannose 6-Phosphate to protein lead to its localization to

50.
In mammalian cells, RNA editing
P. Can change the coding capacity of a gene after transcription
Q. Creates a stop codon in the middle of the apo-B mRNA in intestinal cells but not in liver cells
R. Usually makes many changes in each mRNA
S. Can change specific nucleotides by deamination