A) are extraordinarily efficient energetically.
B) are generally absent, except in egg and sperm cells.
C) can repair deletions, but not mismatches.
D) can repair most types of lesions except those caused by UV light.
E) normally repair more than 99% of the DNA lesions that occur.

A) DNA polymerase has a crucial role in DNA synthesis.
B) DNA synthesis in E. coli proceeds by a conservative mechanism.
C) DNA synthesis in E. coli proceeds by a semiconservative mechanism.
D) DNA synthesis requires dATP, dCTP, dGTP, and dTTP.
E) newly synthesized DNA in E. coli has a different base composition than the preexisting DNA.

A) DNA helicases make endonucleolytic cuts in DNA.
B) DNA primers are degraded by exonucleases.
C) DNA topoisomerases make endonucleolytic cuts in DNA.
D) RNA primers are removed by primase.
E) RNA primers are synthesized by primase.