What is it hypothesized that the earliest known

cells used for producing energy?



a. iron oxide
b. oxygen gas
c. carbon dioxide
d. water vapor
e. iron sulfide


E

Biology & Microbiology

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What molecule is responsible for carrying the acetyl group from pyruvate into the citric acid cycle?

a. NADH b. FADH2 c. ATP d. CoA e. oxaloacetate

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________ ________ includes the Krebs cycle and electron transport.

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

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The principle that states that different homologous chromosomes travel randomly to different ends of the cell is ________

Fill in the blank(s) with correct word

Biology & Microbiology

What is the inorganic soil constituent with the finest particles?

a. clay b. gravel c. humus d. sand e. silt

Biology & Microbiology