GCSE Biology - Respiration #21
Cognito・4 minutes read
Organisms obtain energy primarily from glucose produced during photosynthesis. Cellular respiration breaks down glucose to release energy for essential functions, with aerobic respiration requiring oxygen for efficiency and anaerobic respiration leading to lactic acid buildup.
Insights
- Glucose molecules from photosynthesis are crucial for providing energy to organisms through cellular respiration, enabling essential functions like protein synthesis, muscle movement, and temperature regulation.
- Respiration can be aerobic, utilizing oxygen for efficient glucose breakdown in mitochondria, or anaerobic, occurring without oxygen and resulting in incomplete glucose breakdown, lactic acid accumulation, and alternative products like ethanol and carbon dioxide in plants and yeast for fermentation processes.
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Recent questions
What is the primary source of energy for organisms?
Glucose molecules produced during photosynthesis by plants.
What are the two types of respiration?
Aerobic and anaerobic respiration.
Where does aerobic respiration take place in cells?
Mitochondria.
What is the byproduct of anaerobic respiration in plants and yeast?
Ethanol and carbon dioxide.
How does cellular respiration release energy for organisms?
By breaking down glucose molecules.
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Summary
00:00
Organisms derive energy from glucose via respiration.
- Energy used by organisms primarily comes from glucose molecules produced during photosynthesis by plants. Cellular respiration, an exothermic reaction occurring in living cells, breaks down glucose to release trapped energy for various functions like building proteins, muscle contraction, and maintaining body temperature.
- There are two types of respiration: aerobic, which requires oxygen and is more efficient, occurring in mitochondria to produce carbon dioxide and water; and anaerobic, without oxygen, leading to incomplete glucose breakdown and lactic acid buildup, as seen in sprinting. In plants and yeast, anaerobic respiration can produce ethanol and carbon dioxide, utilized in processes like fermentation for bread, beer, and wine production.
