Q. The physiological mechanism responsible for flowering in response to temperature
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Correct Answer: (B)
Vernalisation
Basic Principles of Biotechnology MCQs | Page - 1
Dear candidates you will find MCQ questions of Basic Principles of Biotechnology here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.
Q. Which of the following amino acids have side chains that are negatively charged under physiological conditions (i.e., near pH 7)?
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Correct Answer: (A)
Asp
Explanation:
Aspartic acid (Asp) has a carboxyl group in its side chain that loses a proton at physiological pH (~7), making it negatively charged.
Why others are incorrect:
- (B) Histidine (His): Side chain is positively charged or neutral around pH 7 because its imidazole group has a pKa close to physiological pH but usually not negatively charged.
- (C) Tryptophan (Trp): Nonpolar, uncharged side chain.
- (D) Cysteine (Cys): Has a thiol group, which is mostly neutral at physiological pH (can be negatively charged but only under more alkaline conditions).
Final Answer: (A) Asp
Q. Histones have very high percentage of basic amino acids (15 - 30%). For this class of proteins which of the following reagents would be a suitable choice for generating peptides in determination of amino acid sequence of the protein
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Correct Answer: (C)
Trypsin
Q. If a reaction is at equilibrium, the free energy, ΔG change is
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Correct Answer: (B)
0
Q. Under standard temperature (T) and pressure (P) conditions, 128 g of an ideal gas molecule A occupies a volume of 1 L. The gas molecule A obeys the relationship RT = 0.25 PV. R and V are universal gas constant and ideal gas volume, respectively. The molecule A is
β
Correct Answer: (D)
O2
Q. A peptide has the sequence Glu-His-Trp-Ser- Gly-Leu-Arg-pro-Gly. What is the net charge of the molecule at PH 11.
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Correct Answer: (D)
-2
Q. Which one of the following statements about eukaryotic RNA polymerases I, II and III is false?
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Correct Answer: (D)
The carboxyl end of RNA Pol II contains a short sequence of only seven amino acids which is called the CTD and which may be phosphorylated
Q. Which one of the following is the unit of heat transfer coefficient?
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Correct Answer: (C)
W m-2 K-1
Q. Which one of the following is the most suitable type of impeller for mixing high viscosity (viscosity > 105 cP) fluids?
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Correct Answer: (B)
Helical ribbon
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