Biology - ATP

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ATP is sometimes referred to as an 'immediate energy source'. Explain why.
ATP releases energy very rapidly. This energy is released in a single step and is transferred directly to the reaction requiring it.
1 of 6
Explain how ATP can make an enzyme-catalysed reaction take place more readily.
ATP provides a phosphate that can attach to another molecule, making it more reactive and so lowering its activation energy. As enzymes work by lowering activation energy they have less 'work' to do and so function more readily.
2 of 6
State three roles of ATP in plant cells.
Any three from: building up macromolecules/ active transport / secretions/ activation of molecules
3 of 6
Name the three ways in which the synthesis of ATP from ADP occurs.
Photophosphorylation / Oxidative Phosphorylation / Substrate-level Phosphorylation
4 of 6
Give three examples of why organisms require energy.
Three from the following: metabolism/ movement/ active transport/ maintenance, repair and division of cells/ production of substances/ maintenance of body temperature
5 of 6
Describe the three stages of the flow of energy through living systems.
1. Light energy from the sun is converted by plants into chemical energy during photosynthesis. 2. The chemical energy is converted into ATP during respiration in all cells. 3. ATP is used by cells to perform useful work.
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Card 2

Front

Explain how ATP can make an enzyme-catalysed reaction take place more readily.

Back

ATP provides a phosphate that can attach to another molecule, making it more reactive and so lowering its activation energy. As enzymes work by lowering activation energy they have less 'work' to do and so function more readily.

Card 3

Front

State three roles of ATP in plant cells.

Back

Preview of the front of card 3

Card 4

Front

Name the three ways in which the synthesis of ATP from ADP occurs.

Back

Preview of the front of card 4

Card 5

Front

Give three examples of why organisms require energy.

Back

Preview of the front of card 5
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