ATP
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Transcript of ATP
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ATPThe Energy Currency of Living Organisms
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Objectives•Understand the molecule ATP
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Expected outcome•Describe the structure of ATP
•Explain how ATP is broken down and synthesised
•Explain why ATP is known as the universal energy currency
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Why do organisms need energy?
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Why do organisms need energy?Metabolism- chemical reactions
Active transport- moving ions and molecules against a concentration gradient
Movement- within an organism and locomotion
Cell division- division, maintenance and repair of organelles
Synthesis of molecules- e.g. enzymes and hormones
Maintaining body temperature- in birds and mammals (endotherms), replacing heat lost to the environment.
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The energy comes from ATP•Adenosine Triphosphate•3 components;
•Adenine•Ribose•3 Phosphate groups
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ATP Molecule
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How ATP produces energy• The breakdown of ATP releases the energy that
living organisms require.
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ATP Breakdown
Adenosine Pi Pi Pi
H2O
30Kj
Adenosine diphosphate
ADP
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Recycling ATP
ATP ADP Pi
Energy Release to Cells
Energy from respirationhttp://www.biologyinmotion.com/atp/index.html
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Roles•Metabolism•Synthesis e.g.•Polysaccharides•Amino acids•DNA/RNA
•Movement•Muscle contraction•Energy to allow muscle filaments to slide
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Roles•Active Transport•Changes the shape of carrier proteins
•Secretion•Forms the lysosomes necessary for
exocytosis
•Chemical Reactions•A phosphate molecule from ATP can be
transferred to another molecule•Makes it more reactive•Lowers activation energy
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The Universal Energy Currency•ATP is a universal energy currency
•What does this mean?
•What is the significance?
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The Universal Energy Currency• What does this mean?• Common intermediate in many reactions• Links energy requiring and energy producing
reactions
• What is the significance?• It is universal with all living things• Easily participates in many reactions• Drives most biological processes• One molecule can be synthesised and perform a
large number of jobs• Only one system is used to deliver to many reactions
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Homework•1. Create a poster on A4 paper to advertise
ATP- your new “energy” currency•Include:•A description of the molecule•An explanation of how it works•The advantageous features of the molecule
•You will also gain marks for creativity and organisation
•2. Background reading for next lesson: glycolysis
•http://www.emc.maricopa.edu/faculty/farabee/BIOBK/BioBookGlyc.html#Glycolysis