SCIENCE
RESPIRATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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requires a ton of oxygen and makes little ATP.
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occurs without oxygen and produces a large amount of ATP.
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requires no oxygen and produces a minimal amount of ATP
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None of the above
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Detailed explanation-1: -Without oxygen, some human cells must use fermentation to produce ATP, and this process produces only two molecules of ATP per molecule of glucose. Although fermentation produces less ATP, it has the advantage of doing so very quickly.
Detailed explanation-2: -Fermentation is the process of producing ATP in the absence of oxygen, through glycolysis alone. Recall that glycolysis breaks a glucose molecule into two pyruvate molecules, producing a net gain of two ATP and two NADH molecules.
Detailed explanation-3: -Glycolysis: In the absence of oxygen, cells generate ATP through glycolysis, which is a common process in both aerobic and anaerobic respiration.
Detailed explanation-4: -Fermentation does not require oxygen and is therefore anaerobic. Fermentation will replenish NAD+ from the NADH + H+ produced in glycolysis. One type of fermentation is alcohol fermentation. First, pyruvate is decarboxylated (CO2 leaves) to form acetaldehyde.
Detailed explanation-5: -Two ATP molecules are required, and four ATP molecules are produced, resulting in a net gain of two ATP. Electrons are also transferred to two NAD+ molecules, forming two NADH molecules.