Parking is not allowed within feet of a railroad crossing. a. 25 b. 50 c. 75 d. 100

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

Which of the following determines the specificity of a dna probe? a. type of radiation b. level of enzymatic activity c. number of neutrons d. complementary base pairing