What process in cellular respiration is essentially the reverse of carbon fixation in photosynthesis?
-glycolysis
-Krebs cycle
-oxidative phosphorylation
-alcohol fermentation
-lactic acid fermentation
-Krebs cycle
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The portion of the tRNA molecule that binds to the codon on the mRNA is called the
A. anticodon. B. c-codon. C. paracodon. D. complementary codon.
Examine Figure 21.14. If you wanted to use a molecular clock to date a relatively recent divergence event—say, one that occurred in the last 100 million years or so—which of the four types of genes would make the best clock? Why?
A. Fibrinopeptides, because they have changed the most over that time period. B. A histone gene, because it has changed relatively little over that time. C. Fibrinopeptides, because they have changed relatively little over that time. D. A histone gene, because it has changed the most over that time period. E. Hemoglobin, because of its moderate rate of change.
Trace a drop of blood from the right atrium through the entire circulatory system then back to the right atrium. Include
in your answer major heart structures and vessels. What will be an ideal response?
In ________, the ribosomes can attach to the mRNA and begin translation even though transcription has not been completed.
A. algae B. eukaryotes C. fungi D. bacteria