After the Krebs reactions run through _____ cycle(s), one glucose molecule has been completely broken down to CO2

a. one c. three
b. two d. six


B

Biology & Microbiology

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Sports physiologists at an Olympic training center wanted to monitor athletes to determine at what point their muscles were functioning anaerobically. They could do this by checking for the buildup of which molecule?

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________ molecules deliver amino acids to ribosomes during translation.

A. Ribosomal RNA (rRNA) B. Messenger RNA (mRNA) C. Transfer RNA (tRNA) D. Heterogeneous nuclear RNA (hnRNA)

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The dermal endoskeleton of echinoderms is made of

a. cartilage. b. bone. c. calcium carbonate. d. chitin.

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Sea stars eat:a

large fish. b. mostly algae. c. sea weed. d. mostly crustaceans and mollusks. e. debris on the bottom.

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