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cellular respiration eou
What is respiration in plants?
It is the process by which plants break down glucose to release energy (ATP) for cellular activities.
What are the types of respiration in plants?
Aerobic respiration and anaerobic respiration.
Where does respiration occur in plants?
In the mitochondria and cytoplasm.
What is the overall equation for aerobic respiration?
C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + Energy (ATP).
What is aerobic respiration?
It is respiration that occurs in the presence of oxygen, producing ATP, CO₂, and water.
Where does aerobic respiration take place?
Mainly in the mitochondria.
How many ATP molecules are produced in aerobic respiration?
Around 36-38 ATP per glucose molecule.
What is anaerobic respiration?
It is respiration that occurs without oxygen, producing less ATP and byproducts like ethanol or lactic acid.
Where does anaerobic respiration occur?
In the cytoplasm.
What are the byproducts of anaerobic respiration in plants?
Ethanol and carbon dioxide.
How many ATP molecules are produced in anaerobic respiration?
Only 2 ATP per glucose molecule.
What are the major stages of aerobic respiration?
Glycolysis, Krebs Cycle (Citric Acid Cycle), and Electron Transport Chain (ETC).
Where does glycolysis occur?
In the cytoplasm.
What happens during glycolysis?
Glucose is broken down into pyruvate, producing 2 ATP and NADH.
Where does the Krebs cycle occur?
In the mitochondrial matrix.
What happens in the Krebs cycle?
Pyruvate is broken down, releasing CO₂, NADH, FADH₂, and 2 ATP.
Where does the ETC occur?
In the inner mitochondrial membrane.
What happens in the Electron Transport Chain?
NADH and FADH₂ transfer electrons to produce 34 ATP.
What is the final electron acceptor in the ETC?
Oxygen, which combines with electrons and protons to form water.
How does respiration differ from photosynthesis?
Photosynthesis: Uses CO₂, H₂O, and light to make glucose and O₂.
Respiration: Breaks down glucose and O₂ to produce ATP, CO₂, and H₂O.
Why do plants need respiration if they photosynthesize?
Photosynthesis makes glucose, but respiration releases energy (ATP) from glucose for plant functions.
What factors influence the rate of respiration in plants?
Temperature: Higher temperature increases respiration up to an optimal point.
Oxygen availability: More O₂ allows more aerobic respiration.
Glucose concentration: More glucose increases respiration.
How does respiration support plant growth?
It provides ATP for cell division, active transport, and other metabolic processes.
