Each tapeworm proglottid contains:
a. sperm
b. eggs
c. cysts
d. eggs and sperm
e. a scolex
d
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The transposon "sleeping beauty" is:
A. a transposon from fish that was reactivated by mutation. B. a transposon from fish that was reactivated by introducing a plasmid that had a functional transposase. C. an artificially constructed transposon based on sequence comparisons of numerous inactive Tc1/mariner transposons. D. a retrotransposon of humans. E. a complex transposon that can move from cell to cell.
To what do transcription factors attach?
a. promoters b. stop codons c. start codons d. polyA tails e. introns
All of the following are true of the process of
phosphorylation EXCEPT that a. a molecule gains a phosphate group. b. a molecule loses a phosphate group. c. molecules become less stable. d. it is used to prime molecules to react. e. it produces ADP from ATP
Which of the following illustrates a negative feedback mechanism that occurs in the human body?
a) the release of insulin from the pancreas in response to an increase in blood sugar levels b) the release of glucagon from the pancreas in response to an increase in blood- sugar levels c) the release of oxytocin resulting in uterine contractions as childbirth is underway d) chemical reactions that result in coagulation due to fibrin being released