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Questions and Answers
What are the products of cellular respiration?
What are the products of cellular respiration?
Cellular respiration requires oxygen in its first stage, glycolysis.
Cellular respiration requires oxygen in its first stage, glycolysis.
False
What gas do plants take up for photosynthesis?
What gas do plants take up for photosynthesis?
Carbon dioxide
The process that converts glucose and oxygen into energy, carbon dioxide, and water is called __________.
The process that converts glucose and oxygen into energy, carbon dioxide, and water is called __________.
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Match the following processes with their characteristics:
Match the following processes with their characteristics:
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What is the primary source of energy for living organisms?
What is the primary source of energy for living organisms?
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Aerobic respiration occurs in the absence of oxygen.
Aerobic respiration occurs in the absence of oxygen.
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Name the three main stages of cellular respiration.
Name the three main stages of cellular respiration.
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The main form of energy produced during cellular respiration is _____
The main form of energy produced during cellular respiration is _____
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Match the type of respiration with its characteristics:
Match the type of respiration with its characteristics:
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What type of respiration do muscle cells primarily use during intense exercise?
What type of respiration do muscle cells primarily use during intense exercise?
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The Kreb's Cycle is an anaerobic process.
The Kreb's Cycle is an anaerobic process.
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What are the byproducts of fermentation in animals?
What are the byproducts of fermentation in animals?
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Study Notes
Cellular Respiration: An Overview
- Organisms get energy from food
- Autotrophs create glucose using photosynthesis.
- Heterotrophs obtain glucose from consuming food.
- Cellular respiration breaks down glucose and other food molecules to release energy.
- There are two types: aerobic (using oxygen) and anaerobic (without oxygen)
- Energy in food is released slowly to avoid significant heat loss (like a marshmallow burning).
- Cellular respiration is the process that releases energy from food (like glucose) when oxygen is present.
- 6O2 + C6H12O6 → 6CO2 + 6H2O + Energy
- Cellular respiration takes place in stages: glycolysis, Krebs cycle, and electron transport chain.
Objectives
- Organisms get energy
- Photosynthesis and cellular respiration are related
- Three main stages of cellular respiration
- Where do organisms get energy
Where do we get the energy we need?
- Living things get energy from glucose.
Controlled Release
- The energy stored in food is released slowly; otherwise, most energy would be lost as heat.
Stages of Cellular Respiration
- Glycolysis: Occurs in the cytoplasm, breaking down glucose (no oxygen is needed). Produces energy carrier molecules (2 ATP).
- Krebs Cycle: (Aerobic) Occurs in the mitochondria matrix. Produces energy carrier molecules.
- Electron Transport Chain: (Aerobic) Occurs in mitochondrial inner membrane. Produces significant amount of ATP.
Mitochondria
- The mitochondria is where the final stages of cellular respiration take place
- Cells with high energy needs (e.g., muscle cells in the heart) have many mitochondria.
Glycolysis: Details
- Glycolysis breaks down glucose.
- Glycolysis occurs in the cytoplasm, not in the mitochondria.
- Glycolysis produces 2 ATP molecules.
Further Details on Glycolysis
- Glucose is broken down.
- 2 ATP are produced.
- Pyruvic acid is formed.
Further Details on Cellular Respiration
- Glycolysis: Anaerobic, in cytoplasm, produces 2 ATP
- Krebs Cycle: Aerobic, in mitochondria, releases CO2
- Electron Transport Chain: Aerobic, in mitochondria inner membrane, produces significant ATP
Fermentation
- Anaerobic respiration occurs in the cytoplasm.
- Plants produce ethanol alcohol
- Animals produce lactic acid
Photosynthesis and Respiration Relationship
- Photosynthesis and cellular respiration have opposite equations — they recycle carbon between living things and the air. Photosynthesis uses CO2 and respiration produces CO2. Photosynthesis releases oxygen and respiration consumes oxygen.
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Description
Explore the process of cellular respiration and understand how organisms obtain energy from food. This quiz covers the relationship between photosynthesis and cellular respiration, the main stages of respiration, and the distinction between autotrophs and heterotrophs. Test your knowledge on how energy is released in living organisms.
