Which one of the following vitamins is known as niacin or nicotinic acid and assists in the normal functioning of the digestive and nervous systems?
a. b3
b. k
c. a
d. b2

In many ways, the regulation of the genes of a particular group of viruses will be similar to the regulation of the host genes. therefore, which of the following would you expect of the genes of a bacteriophage? a) regulation via acetylation of histonesb) positive control mechanisms rather than negativec) control of more than one gene in an operond) reliance on transcription activators