Which of the following best describes the way in which you would use restriction enzymes as you engineered bacterial cells to produce human proteins?
A. The same restriction enzyme would be
used to cut both the donor DNA and the
vector DNA.
B. One restriction enzyme would be used to
cut the donor DNA and a different one would
be used to cleave the vector DNA.
C. One restriction enzyme would be used to
probe the protein-coding region and another
would be used to cleave that region from the
larger DNA molecule.
D. Restriction enzymes would be used only to
cleave the vector DNA.
E. Restriction enzymes would be used only to
cleave the donor DNA.
A
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A catalase test was performed from a sheep blood agar plate on a colony of streptococci, and bubbling was observed. Which of the following statements explains this discrepancy?
a. Catalase is the inappropriate test to use on colonies of streptococci; therefore the re-sults are invalid. b. The colony may have been contaminated with sheep red blood cells, causing a false-positive result. c. The colony was most likely enterococci, not streptococci. d. No discrepancy is present. Streptococcus is a catalase-positive colony.
Sponges can have skeletons made of all these materials except:
a. silica. b. calcium carbonate. c. starch. d. spongin. e. protein.
A polymer made up of many nucleotide monomers covalently bonded together
What will be an ideal response?
You discover a new sunflower that has blue flowers instead of yellow. When you cross this blue variety with a common yellow variety you get blue and yellow speckled flowers. What type of inheritance pattern does this gene exhibit?
A. sex-influenced dominance B. either incomplete dominance or codominance C. simple Mendelian inheritance D. codominance E. incomplete dominance