ATP-ADP CycleATP-ADP Cycle

But first…..

AutotrophsAutotrophs HeterotrophsHeterotrophs

Make their own food• with light – phototrophs• with chemicals -- chemotrophs

Can NOT make own food… they get their energy by the foods they eat

Adenosine tritriphosphate

+

-

adenine

P

P

P

ribose

JOB--- store & release

energy

Adenosine didiphosphate

adenine

P

P

ribose

JOB--- energy can be

stored by adding

another Phosphate..

and becoming ATP

+

-

+

-

+

-

Releasing energyReleasing energy

Storing energyStoring energy

adenine

P

P

P

ribose

adenine

P

P

ribose

Releasing energyReleasing energy

Storing energyStoring energy

ATP-ADP Cycle

• ATP – ADP Cycle

Transformation of Energy

– Energy is the ability to do work.

– Thermodynamics is the study of the flow and transformation of energy in the universe.Laws of Thermodynamics

– First law - Energy can be converted from one form to another, but it cannot be created nor destroyed.

– Second law - Energy cannot be converted without the loss of usable energy.

HEAT

• Carbohydrates

– most commonly broken down to make ATP.

– not stored in large amounts– up to 36 ATP from one glucose molecule

• Lipids

– store the most energy.– 80% of energy in your body– About 146 ATP from a

triglyceride

• Proteins

– least likely to be broken down to make ATP.

– amino acids not usually needed for energy

– about the same amount of energy as a carb.

ATP-ADP Cycle

Using Biochemical EnergyUsing Biochemical Energy

1) Movement in cell

2) Protein synthesis

3) Active Transport

(Low to high concentration across membrane)