The greatest contributor of electrons to the electron transport chain is
a. oxygen.
b. the prep reaction.
c. glycolysis.
d. fermentation.
e. the citric acid cycle.
e. the citric acid cycle.
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Which of the following catalyzes the process of transcription?
a. RNA polymerase b. DNA polymerase c. ligase d. gyrase e. ribosomes
Which of the following is true of all animals?
1.All animals exhibit bilateral symmetry. 2.All animals are multicellular and heterotrophic. 3.Protostomes have a coelom but deuterostomes have a pseudocoel. 4.Animals most likely evolved from cyanobacteria.
Which phrase best describes the exodermis?
a. the outer layer of roots, including root hairs b. the above-ground continuation of the endodermis c. the substitute for the endodermis in gymnosperms d. found in the roots of most flowering plants
Extracts of pathogenic bacteria can transform harmless bacteria to harmful bacteria unless ____ enzymes are added to the extract.
A. protein transfer B. mRNA-degrading C. tRNA-degrading D. DNA-degrading E. nucleic transfer