What is the Ames test, and how does it work?
What will be an ideal response?
Four tester strains of Salmonella typhimurium are used to test for sensitivity and specificity of mutagenesis.
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Human height is a trait affected by both genes and the environment. How is this so?
What will be an ideal response?
Some pathogens have developed mechanisms for responding to the innate phagocytic response. The mechanisms include ALL of the following EXCEPT
a. the ability to grow and persist in phagocytes. b. producing leukocidins that kill phagocytes. c. producing PAMPs (pathogen-associated molecular patterns) on the cell surface. d. making a capsule to prevent adherence of a phagocyte.
Plasmid cloning vectors generally contain genes for which two traits?
a. lacZ production and ampicillin resistance b. ?-galactosidase enzyme production and ampicillin resistance c. DNA ligase production and sticky ends d. DNA ligase and reverse transcriptase production e. DNA polymerase production and antibiotic resistance
Which of the following does (or did) not lay an amniotic (enclosed) egg?
a. birds b. monotreme mammals c. dinosaurs d. frogs e. snakes