1. The Cell and Energy
The Inner Life of a Cell

2. ATP – adenosine triphosphate

3. ATP – adenosine triphosphate
Made up of:
Adenine: a nucleic acid
Ribose: a 5-carbon sugar
Three phosphate molecules

4. ATP – adenosine triphosphate
Like money – pays for work
High energy bonds connect the phosphate groups
Kinases are enzymes that de-phosphorylate ATP

5. ATP – adenosine triphosphate
De-phosphorylation
ATP → ADP + Pi → AMP + Pi
Energy released with bonds breaking
ADP has less energy than ATP (80%)
AMP has less energy than ADP (20%)
Phosphorylation
AMP + Pi → ADP + Pi → ATP

6. ATP – adenosine triphosphate
ATP needs to be continually replaced

7. Two other names to recognize…
NAD (nicotinamide adenine dinucleotide) is an important enzyme for cellular respiration
NADP is an important enzyme in photosynthesis