Which of the following is an exogenous antigen?
A) a bacterium inside a cell
B) a virus inside a cell
C) a bacterium outside a cell
D) a noninfected human cell
E) the malaria parasite inside a red blood cell
C
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Three genes (X, Y, and Z) are in the same region of a bacterial chromosome. To determine the order of these genes, you infect X?Y?Z? cells with a lysate from wild-type cells infected with a generalized transducing phage. When X+ cells are selected, 70% of cells are also Y+ and 5% of cells are Z+. When Y+ cells are selected, 68% of cells are also X+ and 1% are Z+. What is the relative arrangement of the three genes?
A) Z is in the middle, but closer to X. B) Y is in the middle, but closer to Z. C) X is in the middle, but closer to Y. D) X is in the middle, but closer to Z.
Which type of double-stranded break repair would you expect to be used by a cell in the G1 phase of the cell cycle?
What will be an ideal response?
Carolus Linnaeus is considered to be the founder of __________, and he __________.
a. paleontology; believed in catastrophism b. uniformitarianism; believed the same geologic forces are operating today that occurred in the past c. the binomial classification system; thought that resemblances among different species reflected the pattern of their creation d. genetics; described the mechanism for descent with modification e. evolution; first proposed that acquired characteristics are inherited
Which of the following is not studied in the field of proteomics?
A. which genes give rise to which proteins B. protein concentration in a cell C. chemical modifications of proteins D. cellular location of particular proteins E. protein-protein interactions