DNA contains __________ but NOT __________
a. sulfur; phosphorus
b. phosphorus; sulfur
c. potassium; sulfur
d. sulfur; potassium
e. proteins; phosphorus
Answer: b
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Excessive heat or extremes of pH often cause denaturation of proteins, which means that the proteins
a. have fallen apart into individual monomer subunits. b. are no longer biological molecules. c. have broken into many separate domains. d. are no longer in a functional three dimensional structure. e. are highly reactive.
Which organ system acts upon substances contained in the alimentary canal?
A) circulatory system B) digestive system C) integumentary system D) excretory system
Erythrogenic toxin, hyaluronidase, and hemolysins S and O are extracellular products of which of the following?
A. Enterococcus faecalis B. Streptococcus pneumoniae C. Streptococcus pyogenes D. Streptococcus agalactiae E. Viridans streptococci
Molecular Genetics
What will be an ideal response?