If you are told that the digestive tract of the animal you are studying developed an anus before a
mouth, you may be looking at:
a. an arthropod.
b. an animal in which the embryo undergoes radial cleavage.
c. an animal in which the embryo undergoes indeterminate cleavage.
d. an animal in which the embryo undergoes enterocoely.
e. an animal in which the embryo undergoes radial, indeterminate cleavage and enterocoely
A
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Which of these stages of translation is most important to the fidelity of protein synthesis?
A. formation of aminoacyl-tRNAs B. initiation of translation at an AUG codon C. translocation of the peptidyl-tRNA from the A site to the P site during elongation D. termination of translation at a STOP codon
What term describes regulation of the trp operon that can occur even in trpR? mutants, thus suggesting that the mechanism is repressor-independent?
A) modulation B) derepression C) attenuation D) amplification
Which of the following elements is not particularly abundant in living cells?
a. carbon b. hydrogen c. helium d. nitrogen e. oxygen
Fermentation enables glycolysis to continue under
A.) anaerobic conditions. B.) aerobic conditions. C.) photosynthetic conditions. D.) low-light conditions.