Most of the enzymes that catalyze the biochemical reactions involving amino acids recognize the L
stereoisomer.
Indicate whether the statement is true or false.
T
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A DNA molecule used to carry a foreign gene into a host organism is called a
A. plasmid. B. probe. C. vector. D. blot.
This curve most likely represents a graph of enzyme activity
a. as a function of temperature. b. as a function of pH in a strongly acidic environment. c. as a function of pH in a strongly basic environment. d. as a function of pH in a fairly neutral environment. e. as a function of temperature and pH combined.
__________ is a field of study concerned with the
origins, evolution, and persistence of life on Earth as it relates to life in the universe. Fill in the blank(s) with the appropriate word(s).
The methanogenic archaeans are __________ that
pull electrons from __________. a. chemoautotrophs; oxygen b. chemoheterotrophs; carbon dioxide c. chemoautotrophs; water d. chemoheterotrophs; methane e. chemoautotrophs; hydrogen gas