30. DNA replication occurs in which phase of the cell cycle?
a. G phase
b. Prophase
c. Metaphase
d. S phase

31. Nonchromosomal DNA molecules found in a bacterial cell are
a. endospores.
b. transposons.
c. plasmids.
d. prions.

32. The actual genetic makeup of an organism is referred to as its
a. phenotype.
b. genotype.
c. conjugation.
d. construct.