While wastewater is in an activated sludge tank, much of the organic matter is
A) oxidized.
B) adsorbed to the floc.
C) incorporated into microbial cells.
D) oxidized, adsorbed to the floc, and incorporated into microbial cells.
Answer: D
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The protein(s) that facilitate the unfolding of chromatin fibers ahead of the replication fork is (are)
A) helicase. B) scaffold proteins. C) chromatin remodeling proteins. D) replisomal proteins. E) both choices A and B
When rapid speciation produces a cluster of closely related species that occupy different habitats or consume different
foods, the process is referred to as ____.
a. punctuated equilibrium b. disjunct dispersal c. disjunct vicariance d. adaptive radiation e. continuous vicariance
Recent studies on the evolutionary divergence of seed plants from seedless vascular plants used the genome of a ____,
a lycophyte, as a comparison for genomes of the more derived land plants.
a. numerous, large apical cells on the edges of their fronds b. single, large apical cell on the tip of their fronds c. single, large apical cell at the tip of their apical meristems d. numerous, small apical cells at the base of their apical meristems e. single, small apical cell at the base of their apical meristems
Which of the following statements concerning decarboxylation reactions is FALSE?
a. They occur as part of the citric acid cycle. b. They produce CO2 that is then exhaled via breathing. c. They involve the removal of a carboxyl group (?COOH) from a substrate. d. They are one type of general reaction that occurs during aerobic respiration. e. They involve the removal of two protons and two electrons.