Operons ___________________________
(a) are commonly found in eukaryotic cells.
(b) are transcribed by RNA polymerase II.
(c) contain a cluster of genes transcribed as a single mRNA.
(d) can only be regulated by gene activator proteins.
(c)
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A bacterium running low on NADPH could ________ to generate more of this coenzyme
A) degrade an amino acid or nucleic acid B) invoke the pentose phosphate pathway C) degrade a fatty acid D) use a broad specificity phosphatase with inorganic phosphatase and NADH
During the contraction cycle, what is the result of ATP binding to myosin?
A tidepool exposes organisms to all the following except:
a. desiccation. b. thermal stress. c. salinity changes. d. pH changes. e. dissolved oxygen changes.
What is the initial symptom of an HIV infection?
a. flu-like symptoms b. severe rash c. muscle pains d. fever over 40o C e. severe allergic response