Toxic substances are dangerous because they
a. react or interfere with specific cell functions.
b. can physically remove or tear tissues.
c. are usually synthetic.
d. cause debilitating, parasitic diseases.
e. cause excessive water accumulation in tissues.

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