If the innate immune response is not effective in neutralizing a threat, what form of immune response occurs next?
a. production of antibodies by T cells
b. phagocytosis by neutrophils
c. natural killer cells respond to sites of inflammation
d. antigen detection by antibodies
e. phagocytosis of MHC markers
ANSWER: d
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Linked genes are
a. genes whose effects combine to affect a single characteristic. b. different alleles of the same gene. c. genes that affect two different traits and that lead to a 9:3:3:1 phenotype ratio in a dihybrid cross. d. genes that do not sort independently due to their being physically near each other on the same chromosome. e. genes on two different chromosomes
Peroxisomes would most likely be involved in the metabolism of
a. glucose. b. alcohol. c. white blood cells. d. pesticides. e. nucleoli.
When direct examination of virioplankton is carried out by transmission electron microscopy, the numbers obtained are reported as ________.
A. particulate organic matter B. plaque-forming units C. virus-like particles D. viral potential
The plasma membrane is a semipermeable membrane. This means that it is:
A) only permeable to cholesterol. B) permeable to large charged molecules but not to small uncharged molecules. C) permeable to small molecules except water. D) permeable to small and uncharged molecules but not to larger or charged substances.