Cats cannot synthesize the amino acid taurine. This means that in cats, taurine

A. is not a required nutrient.
B. is an essential amino acid.
C. is a nonessential amino acid.
D. must be stored in cellular compartments.
E. is not present in their normal diet.


B. is an essential amino acid.

Biology & Microbiology

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A. All of the answer options are correct. B. promote protein synthesis. C. promote anabolic metabolism to store energy within cells. D. build and strengthen muscle tissue. E. interfere with the normal production of anterior pituitary tropic hormones.

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The atmospheric pressure on top of Mt. Everest is only about 238 mmHg, so the approximate partial pressure of oxygen there is

A. 2.4 mmHg. B. 50 mmHg. C. 186 mmHg. D. 238 mmHg. E. 476 mmHg.

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Which molecule remains in the nucleus during protein synthesis?

A) DNA B) tRNA C) mRNA D) rRNA

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What enzyme is used to convert the toxic chemicals of respiration into hydrogen peroxide?

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