6 Questions
What is the primary energy source for all organisms on earth?
Sunlight
What is the end result of photosynthesis?
The storage of energy in glucose
What is the process of breaking down glucose into simpler molecules?
Cellular respiration
What is the energy currency for cells?
ATP
What is the relationship between photosynthesis and cellular respiration?
They are opposite processes
What is required for the continuous functioning of photosynthesis and cellular respiration?
A constant input of sun energy
Study Notes
Energy and Cells
- The sun is the principal source of energy for all organisms on earth.
- This light energy is absorbed by photosynthetic organisms, such as plants and algae.
Photosynthesis
- Photosynthesis converts carbon dioxide (CO2) to glucose and oxygen using light energy.
- The energy from the sun is stored in glucose, a simple carbohydrate.
- Glucose is used as food by humans and other organisms.
Cellular Respiration
- Cellular respiration is the process of breaking down glucose into simpler molecules.
- This process releases energy from glucose and stores it in adenosine triphosphate (ATP).
- ATP is the major energy carrier for cells.
Relationship Between Photosynthesis and Cellular Respiration
- The molecules produced in photosynthesis are used in cellular respiration.
- The molecules produced in cellular respiration are used in photosynthesis.
- The energy stored in glucose during photosynthesis is released as ATP during cellular respiration.
- A constant input of sun energy is needed to maintain these processes.
Identify ATP as the major energy carrier for cells and analyze the inputs to and outputs of the stages of photosynthesis, the principal source of energy for all organisms on earth.
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