Multiple Choice
Which of the following is the process in which glucose is oxidized to generate two molecules of pyruvate and in which ATP and NADH are produced?
8. Respiration
Glycolysis
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Of the listed metabolic pathways, which is the only pathway found in all organisms?
A
Cellular respiration
B
The citric acid cycle
C
The electron transport chain
D
Fermentation
E
Glycolysis
Verified step by step guidance1
Begin by understanding what metabolic pathways are. Metabolic pathways are series of chemical reactions occurring within a cell that lead to the conversion of one substance into another. They are crucial for maintaining the cell's energy balance and overall function.
Next, consider the universality of metabolic pathways. Some pathways are found in all organisms, from the simplest bacteria to complex multicellular organisms. These pathways are essential for basic cellular functions.
Examine each of the listed pathways: Cellular respiration, the citric acid cycle, the electron transport chain, and fermentation. These are all important processes, but they are not universally present in all organisms.
Focus on glycolysis. Glycolysis is a metabolic pathway that breaks down glucose into pyruvate, releasing energy in the form of ATP. It is the first step in cellular respiration and is found in all organisms, regardless of whether they are aerobic or anaerobic.
Conclude that glycolysis is the only pathway among those listed that is universally present in all organisms. It is a fundamental process for energy production, highlighting its importance in the survival and function of all living cells.
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