Avery, MacLeod, and McCarty purified DNA by making a DNA extract. When they treated the extract with DNase, how did that affect the results of the experiments?

The phenomenon that humans maintain a relatively constant body temperature is an example of what principle of biology?

A P generation cross was made between a true-breeding tall plant and a true-breeding dwarf plant. All of the F1 offspring were tall. If the F1 offspring were self-fertilized, what is the expected F2 phenotypic ratio?

What happens when allolactose levels increase in E. coli?

Reverse transcriptase is an enzyme that can synthesize DNA from an RNA template. Which DNA sequence is produced from an RNA molecule with the sequence 5’AUUGACGGU3′?

Which of the following components of a virus is not encoded by its own genome?

Which of the following is the second phase of mitosis?

Which of the following events occur during meiosis but not during mitosis?

An individual that has different alleles of a particular gene is said to be

 You cut some sheep DNA and some plasmid DNA with the same restriction enzyme. The plasmid contains an  AmpR gene and a  lacZ gene. You mix together the fragments of sheep DNA and the linearized plasmid. You transform bacteria with your mixture, and plate the bacterial cells on growth media containing the antibiotic ampicillin and X-gal (the substrate of beta-galactosidase). You need to pick some bacterial colonies that contain recombinant plasmids. Which colonies do you choose?