Introduction to Energy Transfers

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Prior Knowledge
During photosynthesis, light energy is absorbed by chlorophyll and used to convert carbon dioxide and water to glucose and oxygen. The rate of photosynthesis may be limited by shortage of light, carbon dixode or low/high temperature.
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Plants: why do they need energy?
For photosynthesis, active transport, DNA replication, cell division and protein synthesis
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Animals: why do they need energy?
For muscle contraction, maintenance of body temperature, active transport, DNA replication, cell division and protein synthesis
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Aerobic Respiration
Glucose + Oxygen -> Carbon Dioxide + Water + ENERGY
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What happens to the ATP once it is made?
ATP diffuses to the areas of the cell that needs it.
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Anaerobic Respiration: In Humans
Glucose -> Lactic Acid + ENERGY
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Where inside the cell does most of the stages of respiration take place?
In the MITOCHONDRIA
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Where does photosynthesis occur?
In the CHLOROPHYLL (in the chloroplasts)
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What makes ATP a good energy source?
ATP is a small, soluble molecule and can be quickly remade. It can't pass out of the cell, so is always available as an immediate source for the cell. It's 3rd phosphate bond is energy rich.
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ATP: Good Energy Source Continued.....
ATP can be easily broken down, can make other molecules more reaction by adding one of its phosphate groups to them and no energy is wasted as heat.
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Other cards in this set

Card 2

Front

Plants: why do they need energy?

Back

For photosynthesis, active transport, DNA replication, cell division and protein synthesis

Card 3

Front

Animals: why do they need energy?

Back

Preview of the front of card 3

Card 4

Front

Aerobic Respiration

Back

Preview of the front of card 4

Card 5

Front

What happens to the ATP once it is made?

Back

Preview of the front of card 5
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