Asked by Wolf Haley
Justify the importance of cellular respiration in humans. How is it important?
Responses
It provides photosynthesis reactions for the Krebs cycle.
It provides photosynthesis reactions for the Krebs cycle.
It provides alcoholic fermentation to give maximum energy.
It provides alcoholic fermentation to give maximum energy.
It provides adenosine triphosphate needed for energy.
It provides adenosine triphosphate needed for energy.
It provides glycolysis process to occur which gives the maximum energy.
All Answers 1
Answered by
GPT-5 mini
AI
Correct answer: It provides adenosine triphosphate (ATP) needed for energy.
Why: cellular respiration is the set of metabolic pathways that oxidize glucose (and other fuels) to produce ATP, the usable energy currency of cells. ATP powers all energy‑requiring processes in the body — muscle contraction, active transport across membranes, biosynthesis of macromolecules, nerve impulses, and heat production.
Brief outline of the process and why it’s efficient:
- Glycolysis (cytosol) breaks glucose into pyruvate and yields a small amount of ATP (net 2 ATP) and NADH.
- Pyruvate is further oxidized and enters the Krebs (citric acid) cycle (mitochondrial matrix), producing NADH and FADH2 and a little more ATP/GTP.
- Oxidative phosphorylation (electron transport chain and ATP synthase, inner mitochondrial membrane) uses electrons from NADH/FADH2 to generate a large amount of ATP by chemiosmosis. In human cells the complete aerobic oxidation of one glucose yields on the order of ~30–32 ATP (approximate value).
Why the other choices are wrong:
- Photosynthesis reactions do not occur in humans — photosynthesis is performed by plants, algae and some bacteria.
- Alcoholic fermentation is a pathway used by yeast and some microbes, not human cells (humans perform lactic acid fermentation under anaerobic conditions). Fermentation yields far less ATP than aerobic respiration.
- Glycolysis is part of cellular respiration and does produce ATP, but by itself it gives only a small amount; the maximum energy yield comes from the mitochondrial (aerobic) steps, especially oxidative phosphorylation.
Why: cellular respiration is the set of metabolic pathways that oxidize glucose (and other fuels) to produce ATP, the usable energy currency of cells. ATP powers all energy‑requiring processes in the body — muscle contraction, active transport across membranes, biosynthesis of macromolecules, nerve impulses, and heat production.
Brief outline of the process and why it’s efficient:
- Glycolysis (cytosol) breaks glucose into pyruvate and yields a small amount of ATP (net 2 ATP) and NADH.
- Pyruvate is further oxidized and enters the Krebs (citric acid) cycle (mitochondrial matrix), producing NADH and FADH2 and a little more ATP/GTP.
- Oxidative phosphorylation (electron transport chain and ATP synthase, inner mitochondrial membrane) uses electrons from NADH/FADH2 to generate a large amount of ATP by chemiosmosis. In human cells the complete aerobic oxidation of one glucose yields on the order of ~30–32 ATP (approximate value).
Why the other choices are wrong:
- Photosynthesis reactions do not occur in humans — photosynthesis is performed by plants, algae and some bacteria.
- Alcoholic fermentation is a pathway used by yeast and some microbes, not human cells (humans perform lactic acid fermentation under anaerobic conditions). Fermentation yields far less ATP than aerobic respiration.
- Glycolysis is part of cellular respiration and does produce ATP, but by itself it gives only a small amount; the maximum energy yield comes from the mitochondrial (aerobic) steps, especially oxidative phosphorylation.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.