The formation of peptide bonds during translation is catalyzed by peptidyl transferase, an enzyme that
is
a. a protein in the small ribosomal subunit.
b. part of an rRNA in the small ribosomal subunit.
c. part of an rRNA in the large ribosomal subunit.
d. a protein in the large ribosomal subunit.
e. carried to the growing peptide chain by a tRNA
C
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Mimivirus contains some of the genes required for protein synthesis. This is cited as support for which hypothesis about the origins of viruses?
A) degeneration B) origin of life C) escaped-genes D) transposable elements
The following will increase the rate of reaction:
A. free energy of product lower than that of substrate B. free energy of product lower than that of transition state C. interactions between atoms during the transition state D. enzyme complementary to substrate E. number of covalent groups combining with substrate during the reaction
If an individual for whatever reason cannot
pass on its genes to offspring, the best alternative is to show altruism to a. relatives. b. strangers. c. neighbors. d. other species. e. competitors.
Which parts of a flower are most likely to have distinctive colours, patterning, and shapes for attracting pollinators?
a. the petals b. the receptacles c. the sepals d. the stamens