Q. E. coli cells with a mutated Z gene of the lac operon cannot grow in medium containing only lactose as the source of energy because : (a) In the presence…
Q. The length of DNA molecule greatly exceeds the dimensions of the nucleus in eukaryotic cells. How is the DNA accommodated? (a) Super-coiling in nucleosomes. (b) DNase digestion. (c)Through elimination…
Q. If a length of DNA has 45,000 base pairs, how many complete turns will the DNA molecule take? (a) 4500 (b) 45000 (c) 45 (d) 450 Solution : Correct…
Q. Polymerase chain reaction is most useful in : (a) DNA synthesis (b) DNA amplification (c) Protein synthesis (d) Amino acid synthesis Solution : Correct option : B 1.The polymerase chain…