Ephedrine is a stimulant that is derived from a member of the phylum
A. Hepaticophyta.
B. Gnetophyta.
C. Pterophyta.
D. Cycadophyta.
B. Gnetophyta.
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The lacP site within the lac operon is upstream of the genes that encode for lactose uptake and metabolism proteins. The lacP site is
A. the lac promoter site. B. where RNA polymerase binds. C. the site where genes are transcribed that encode proteins for metabolizing lactose. D. the lac promoter site where RNA polymerase binds. E. the lac promoter site, where genes are transcribed that encode proteins for metabolizing lactose.
The building blocks of nucleic acids are
a. amino acids. b. nucleotides. c. pentose sugars. d. phosphate groups. e. nitrogenous bases.
Feedback inhibition occurs when the product of a reaction can bind to an enzyme, shutting off the reaction.
a. true b. false
________ is a term that refers to similarities among various species that occur because the species are derived from a common ancestor.
A. Analogy B. Phylogeny C. Morphology D. Heterology E. Homology