Molecular Biology and Genetics MCQs | Page - 3
Dear candidates you will find MCQ questions of Molecular Biology and Genetics 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. During transcription,
✅ Correct Answer: (C)
Both DNA gyrase and DNA topoisomearse I introduce negative supercoils
Q. What will be the binding status of regulatory proteins in lac operon when concentrations of both lactose and glucose are very low in the culture medium?
✅ Correct Answer: (D)
Both the repressor and cAMP-CAP complex remain bound to their respective binding sites
Q. The 5' ends of the mature forms of the prokaryotic mRNAs and tRNAs are
✅ Correct Answer: (A)
A triphosphate group in mRNAs and a monophosphate group in tRNAs
Q. Nuclease-hypersensitive sites in the chromosomes are sites that appear to be
✅ Correct Answer: (D)
Nucleosome free
Q. How many different protein sequences of 100 residues can be generated using 20 standard amino acids?
✅ Correct Answer: (C)
20100
Q. The G + C content of bacteriophage M13 double stranded DNA is 68%. What would you expect the G + C content of its mRNA?
✅ Correct Answer: (A)
About 68%
Q. Efficient expression of a heterologous protein product is influenced by
✅ Correct Answer: (D)
All of the above
Q. The 4-amino or 4-keto group of pyrimidine bases is located in the
✅ Correct Answer: (A)
Major groove of the double stranded DNA
Q. RNA is very much susceptible to hydrolysis in alkali because
✅ Correct Answer: (B)
its 2'-OH group participate in intramolecular cleavage of phosphodiester backbone
Jump to