Light enters the eye's interior through the __________, an adjustable opening in the center of the muscular, doughnutshaped
iris. Fill in the blank(s) with the appropriate word(s).
ANSWER: pupil
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An amino acid is to a protein as a ________ is to a nucleic acid.
A. glucose B. glycerol C. nucleotide D. fatty acid E. cellulose
Which of the following is not a prion disease?
A) scrapie B) tuberculosis C) mad cow disease D) Creutzfeldt-Jacob disease
During DNA sequencing, a laser beam scans the fragments on the electrophoresis gel to identify the ____________________
a. gene sequence by the color it fluoresces b. end nucleotide by the color it fluoresces c. useful DNA strands that will be analyzed further d. gene products that have been fixed by the gel e. gene products that have been sorted by the addition of a probe
Four of the five answers listed below are heterotrophic. Select the exception
a. consumers b. carnivores c. herbivores d. parasites e. producers