4.2: ATP Flashcards

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1
Q

How does ATP store energy?

A

The molecule has three phosphates, the bonds between the phosphate groups are unstable so they have a low activation energy. They are easily broken, which releases a considerable amount of energy.

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2
Q

Describe the three stages of energy flow in living things

A
  1. Light energy from the sun is converted into chemical energy by plants during photosynthesis.
  2. The chemical energy is converted into ATP during cellular respiration.
  3. ATP is used by cells
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3
Q

Uses of ATP

A
  • Metabolic processes such as digestion
  • Muscle contractions
  • Active Transport
  • Division and repair of cells
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4
Q

Why is ATP effective at it’s role

A
  • It’s easily hydrolysed in a one step reaction
  • Stores a small amount of energy
  • Cannot pass out of the cell
  • Has a phosphate that can be transferred onto another molecule
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5
Q

Describe the synthesis of ATP

A

Energy is used to add an inorganic phosphate to ADP to form ATP and water. This is a condensation reaction.

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