Relative to the mRNA, what move(s) during translocation?
a. attached tRNAs and the polypeptide chain
b. attached tRNAs and the ribosome
c. the ribosome and the polypeptide chain
d. the ribosome only
Ans: d. the ribosome only
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A series of enzymatic steps that fixes carbon dioxide into carbohydrate is called the ________.
A. Pentose phosphate pathway B. Entner-Doudoroff pathway C. Calvin-Benson cycle D. Embden-Meyerhoff pathway
The changes that were necessary to cope with the heavy energy demands of flight in birds include all of the following except
A. efficient respiration. B. efficient circulation. C. endothermy. D. auxiliary air sacs and hollow bones. E. a three-chambered heart.
The two amino acids depicted above both have side groups (R groups) that are
a. acidic and polar. b. uncharged and nonpolar. c. basic and polar. d. positively and negatively charged and nonpolar. e. uncharged and polar.
Winkler and Sheldon used the _____ to study _____ in swallows and martins
a. mating method; mating systems b. mating method; nest building c. comparative method; mating systems d. comparative method; nest building e. reproductive method; nest building