atp production a2 biology. starter complete the definition loop from as level biology when completed...
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ATP ProductionATP Production
A2 BiologyA2 Biology
StarterStarter
Complete the definition loop from AS Complete the definition loop from AS Level biologyLevel biology
When completed it will form a loopWhen completed it will form a loop
Example:Example:
respiration
Release of energy from organic compounds
EnergyEnergy
The Need for Energy:The Need for Energy:
Metabolism-all the biological Metabolism-all the biological reactions needed for an reactions needed for an organism to stay aliveorganism to stay alive
Metabolism = Anabolism + Metabolism = Anabolism + CatabolismCatabolism
Chemical energy is contained in Chemical energy is contained in foodfood
UsesUses
All living things need a All living things need a continuous supply of energy for:continuous supply of energy for:
The Flow of Energy:The Flow of Energy:
1) 1)
2) 2)
3) 3)
ATP Structure:ATP Structure:
When a phosphate group is When a phosphate group is removed from ATP, ADP is formed removed from ATP, ADP is formed andand
30.5 kJ/mol of energy is released30.5 kJ/mol of energy is released
This is a reversible reaction:This is a reversible reaction:
Reversible reactionReversible reaction
exergonic = release of energyexergonic = release of energy
ATP ATP ADP + Pi + energy (30.5 kJ/mol) ADP + Pi + energy (30.5 kJ/mol)
endergonic = requires energyendergonic = requires energy
ADP + Pi + energy (30.5 kJ/mol) ADP + Pi + energy (30.5 kJ/mol) ATP ATP
The Universal Energy CurrencyThe Universal Energy Currency
ATP:ATP:– smallsmall– soluble (can diffuse rapidly around cell)soluble (can diffuse rapidly around cell)– high free energy of hydrolysis (a high free energy of hydrolysis (a
relatively large amount of energy is relatively large amount of energy is released)released)
How is ATP Produced?How is ATP Produced?ATP is produced in the cell in two ATP is produced in the cell in two ways: ways:
1. Substrate-Level Phosphorylation1. Substrate-Level Phosphorylation
2. Chemiosmosis 2. Chemiosmosis
Substrate-Level Substrate-Level Phosphorylation (SLP)Phosphorylation (SLP)
involves the transfer of involves the transfer of phosphate from a high energy phosphate from a high energy molecule to ADP, with the aid of molecule to ADP, with the aid of an enzyme. an enzyme.
animationanimation
ChemiosmosisChemiosmosis
requires a phospholipid bilayer, requires a phospholipid bilayer, a proton pump, protons and a proton pump, protons and ATPase. ATPase.
energy from food molecules is energy from food molecules is used to pump protons out used to pump protons out through a proton pump (intrinsic through a proton pump (intrinsic protein). This creates a protein). This creates a concentration of protons (H+) concentration of protons (H+) outside. outside.
ATPase has a channel that allows ATPase has a channel that allows for the facilitated diffusion of for the facilitated diffusion of protons back in through the protons back in through the membrane. This activates membrane. This activates ATPase, which in turn catalyzes ATPase, which in turn catalyzes the formation of ATPthe formation of ATP
Animation1Animation1
Animation2Animation2
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MitochondriaMitochondria
How is it How is it adapted for adapted for ATP ATP synthesis?synthesis?
AssignmentAssignment
Draw an annotated diagram of a Draw an annotated diagram of a mitochondrionmitochondrion
Draw a diagram to explain the Draw a diagram to explain the process of chemiosmosisprocess of chemiosmosis
Explain how the proton concentration Explain how the proton concentration gradient is maintainedgradient is maintained