____ is the first stage of aerobic respiration and fermentation.

A. Anaerobic
B. Substrate-level phosphorylation
C. Glycolysis
D. Cellular respiration
E. Pyruvate


Answer: C

Biology & Microbiology

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The substance on which an enzyme acts is called the:a

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Air flow into and out of the lungs is an example of

A) bulk flow. B) facilitated diffusion. C) active transport. D) osmosis. E) diffusion.

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Isotopes that are unstable and decay when their nucleus breaks up into elements with lower atomic numbers, emitting significant amounts of energy in the process, are called

A. isometric. B. ionic. C. radioactive. D. energetic.

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Human sex cells have 23 pairs of chromosomes. Sex cells, sperm and eggs, are known as ___________ and are _________ These cells are created by _____

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology