Bacterial strains that can produce all the necessary compounds and therefore grow on minimal media are called:
A. auxotrophs.
B. omnitrophs.
C. prototrophs.
D. autotrophs.
E. heterotrophs.
Ans: C. prototrophs.
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Varicose veins are the result of:
a. excessive blood volume b. torn walls of veins c. slow blood movement d. damaged valves e. excessive exercise
Does the permeability of the membrane to water affect the equilibrium flowin-flowout value?
a. Yes b. No
Who provided X-ray diffraction photographs of purified DNA fibers that suggested a helical structure with a consistent diameter of about 2 nm and a complete helical turn every 3.4 nm?
A. Chargaff B. Watson and Crick C. Hershey and Chase D. Franklin
If a diploid cell goes through meiosis it will generate
a)two haploid cells. b)four diploid cells. c)two diploid cells. d)four haploid cells. e)This is not possible.