The theory illustrated by Figure 21-1 is used to explain the origin of:
a. anaerobes.
b. prokaryotes.
c. eukaryotes.
d. vascular plants.
e. protobionts
C
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In eukaryotes, glycolysis occurs in the:a
mitochondrial inner membrane. b. lysosomes. c. Golgi complex. d. cytosol. e. mitochondrial matrix.
When light hits a pigment, how many electrons are excited by a single photon?
a. one b. two c. three d. four
In which plants is the gametophyte larger and longer-lived?
A. Sporophyte B. Lycophyte C. Bryophyte D. Anthocerotophyta E. Monilophyte
Which of the following is not true of the second step of translational elongation in bacteria?
A. The carboxyl group oxygen of the A-site amino acid is the nucleophile in peptide bond formation. B. A peptide bond is formed between the two amino acids bound by the tRNAs in the A and Psites. C. The growing polypeptide chain is transferred to the tRNA in the A site. D. The ?-amino group of the A-site amino acid attacks the carbonyl carbon of the P-site amino acid.