What is ATP All living cells require energy

What is ATP? • All living cells require energy, and this energy is provided by respiration. • glucose + oxygen àcarbon dioxide + water (+ energy)

What form is this energy in? • It’s in the form of chemical energy stored in a compound called ATP (adenosine triphosphate). • So all respiration really does is convert chemical energy stored in glucose into chemical energy stored in ATP.

ATP - and intermediate source of energy

Structure of ATP • ATP is a nucleotide, one of the four found in DNA • BUT it also has this other function as an energy storage molecule. • ATP is built up from ADP and phosphate (PO 43 -) , abbreviated to Pi):

Structure of ATP • Phosphorylated nucleotide • adenine base • pentose sugar ribose • 3 inorganic phosphate groups

ATP to ADP • Hydrolysis reaction • catalysed by

ATP

• ATP + H 20 ADP + Pi

ATP facts

• Cells of all organisms contain ATP • it has a universal role as an intermediate energy currency • BUT • remains within cells cannot be transported • cannot be stored for longer than a few minutes • must be continually produced wherever it is needed

What form is this energy in? It’s in the form of chemical energy stored in a compound called ATP (adenosine triphosphate). So all respiration really does is convert chemical energy stored in glucose into chemical energy stored in ATP is a nucleotide, one of the four found in DNA (see module 2), but it also has this other function as an energy storage molecule. ATP is built up from ADP and phosphate (PO 43 -) , abbreviated to Pi):