The polymerase chain reaction was devised by:
a. Francis Crick.
b. Walter Gilbert.
c. E.M. Southern.
d. Kary Mullis.
e. Leland Hartwell.
D
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Which of the following contains bacteriochlorophyll?
A. Bacillus subtilus B. Staphylococcus aureus C. Streptococcus pyogenes D. E. coli E. Chromatium, Thiospirillum, Thidictyon
If an otherwise healthy 20 year old male were to take large amounts of testosterone supplements in order to build muscle mass, what would be the likely effect(s)? Check all that apply.
_____ Over expression of secondary sex characteristics _____ Increased levels of LH and FSH _____ Increase in spermatogenesis _____ Decrease in levels of GnRH
An allele that completely masks the effect of another allele is considered
A) codominant. B) dominant. C) ineffective. D) recessive.
Which of the following is used in the production of buttermilk and cheese?
A. Streptococcus mutans B. Enterococcus faecalis C. Lactococcus lactis D. Streptococcus pneumoniae