Compare and contrast ethanol and lactic acid fermentation pathways
What will be an ideal response?
Answer: Both fermentation pathways regenerate NAD+, the oxidized form of the coenzyme that is necessary for glycolysis to continue producing ATP in the absence of oxygen. In the case of lactate fermentation, NADH donates electrons directly to pyruvate, which with addition of a proton becomes lactate. In ethanol fermentation, pyruvate first is decarboxylated to form acetaldehyde, which then accepts the NADH electrons and a proton to become ethanol.
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By what mechanism did allele frequencies change due to the asteroid?
A) Allele frequencies did not change because of the asteroid. B) The asteroid caused mutations in the fish population. C) The asteroid changed the environment, so fish with allele S2 had increased fitness. D) The asteroid killed fish because of their location, so the allele frequency changed by chance.
Do only plants have vacuoles?
A. Yes, only plants cells have vacuoles. B. No, bacteria also contain vacuoles that serve the same function C. No, other organisms, such as certain types of fungi and protists, have vacuoles that serve different functions. D. No, other organisms, such as certain types of fungi and protists, have vacuoles that serve the same function as in plant cells.
As much as 50 percent of a soil’s volume is
a. air. b. iron. c. manganese. d. water.
__________ fights infection by increasing the metabolic rate. Fill in the blank(s) with the appropriate word(s)