In the United States, if a nutrition label lists a food's energy content as 420 calories:
A. the energy content is actually 420 kilocalories.
B. it contains approximately 100 joules of energy.
C. it contains less than 420 joules of energy.
D. this represents 42 percent of a typical adult's daily energy needs.
E. the energy content will be converted to stored energy.

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