Question

cellular respiration quick check
identify the byproduct of lactic acid fermentation. (1 point)
carbon dioxide
pyruvic acid
oxygen
lactic acid

Explanation:

Lactic - acid fermentation converts pyruvic acid into lactic acid with no carbon - dioxide or oxygen production. Pyruvic acid is the starting material, not a by - product. Lactic acid is the main product. The by - product is not oxygen or pyruvic acid. During lactic acid fermentation, pyruvic acid is reduced to lactic acid, and the only by - product among the options is carbon dioxide which is not produced in lactic acid fermentation. The main product is lactic acid, but considering the options and the nature of fermentation processes, carbon dioxide is the incorrect option as it is not a by - product of lactic acid fermentation. Pyruvic acid is the reactant, oxygen is not a by - product, and lactic acid is the main product. So, there seems to be an error in the options as the real by - product of lactic acid fermentation is usually water along with the regeneration of NAD+ (not listed). But if we have to choose from the given options, none of them are correct in a strict sense. However, if we assume the question is misphrased and it wants the main product, it is lactic acid.

Answer:

lactic acid