Glycolysis reactions involve ____
a. aerobic metabolism
b. phosphorylation reactions
c. mitochondria
d. Krebs cycle reactions
e. electron transport chain reactions
ANSWER: b
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Why are microbial doubling times in nature typically longer than those obtained in the laboratory?
What will be an ideal response?
A population is experiencing ____ if the allele
frequency remains stable.
a. genetic imbalance b. genetic equilibrium c. random mutations d. controlled mutations e. random change
During primary growth:
A. A plant’s roots and shoots thicken and become woody. B. A plant’s roots and shoots lengthen, and it produces soft parts such as leaves. C. Two lateral meristems form in older stems and roots. D. When cells of vascular cambium divide, some of them differentiate. E. In eudicots and gymnosperms, the thickening originates at lateral meristems.
Some restriction enzymes do not leave sticky ends when cutting DNA molecules; rather, they cut a restriction site down the middle and leave "blunt-ended" DNA molecules, which do not have any single-stranded nucleotide extensions. Which of the following
is not a likely outcome when trying to insert a gene into a plasmid when both have been cut with the same "blunt-ended" restriction enzyme? A) The gene might be inserted into the plasmid by forming hydrogen bonds. B) The gene might be inserted into the plasmid multiple times in a row. C) The gene might insert into the plasmid in the proper (forward) orientation. D) The gene might insert into the plasmid in the wrong (backward) orientation.