In bacteria, which protein complexes with aminoacyl-tRNAs and GTP to bind to the ribosomal A site?
a. EF-Tu
b. eIF2
c. IF-2
d. EF-Ts
e. EF-G
Ans: a
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Within the framework of an experiment, describe the
a. independent variable: b. dependent variable: c. controlled variables:
The brain perceives the pitch of a sound based on the
a. region of the cochlea sending the signal. b. number of action potentials sent by the neurons. c. speed of the action potentials sent by the neurons. d. size of the action potentials sent by the neurons. e. tension produced along the cochlear membrane.
Exercise goals are not considered to be a part of the exercise prescription.
a. true b. false
You have performed the following mating experiment using Hfr and F- strains of Escherichia coli: Hfr (thr+ leu+ gal+ strs) à— F- (thr- leu- gal- strr). Which of the following selective media would you use to score recombinant colonies?
A) minimal medium B) minimal medium + streptomycin C) minimal medium + threonine D) minimal medium + streptomycin + threonine