All of the following have potential energy EXCEPT

A. ATP.
B. nitrogen.
C. an electrical/ion gradient.
D. concentration gradient.
E. NADH


B. nitrogen.

Biology & Microbiology

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A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase, which functions in the metabolism of phenylalanine, with known database sequences. Which of the following should provide the closest match?

A. green pufferfish B. zebrafish C. chicken D. orangutan E. fruit fly

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The half-life of carbon-14 is approximately 5,700 years. How much of an initial 1.0 gram sample of carbon-14 will remain after 11,400 years (two half-lives)?

a. 0.33 grams (33%) b. 0.5 grams (50%) c. 0.25 grams (25%) d. 0.12.5 grams (12.5%)

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This lineage of Echinoderms is made up of brittle stars and basket stars, each with elongated, slender,

somewhat snakelike arms surrounding a well-defined central disk.

a. Echinoidea b. Ophiuroidea c. Crinoidea d. Holothuroidea e. Asteroidea

Biology & Microbiology

In which way are NADH and FADH2 related?

a. They both carry high-energy phosphates. b. They both carry high-energy electrons. c. They are both used in glycolysis. d. They both directly produce ATP.

Biology & Microbiology