What is the primary composition of the mitotic spindle?
a. microtubules
b. intermediate filaments
c. keratin
d. actin filaments
Ans: a. microtubules
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Which assay is available to identify F. tularensis serologically?
a. Complement fixation b. Direct fluorescent antibody test c. Immunodiffusion assays d. Enzyme-linked immunosorbent assays (ELISAs)
Which of the labeled graphs above represents the age span of worker bees primarily occupied by
packing pollen?
a. A b. B c. C d. D e. E
Homologous pairs of chromosomes separate during meiosis I
__________________ Indicate whether the statement is true or false.
Bacterial production of the enzymes needed for the synthesis of the amino acid tryptophan declines with increasing levels of tryptophan and increases as tryptophan levels decline. This is an example of
A) competitive inhibition. B) noncompetitive inhibition. C) feedback inhibition. D) irreversible inhibition.