Respiration

• We need energy to drive our biological processes.
• All the reactions that take place within organisms are collectively known as metabolism.
• Building large molecules = anabolic
• Breaking down molecules= catabolic.

Metabolic processes include

• Active transport
• Secretion
• Endocytosis
• Sythesis of molecules (eg. amino acids to proteins)
• Replication of DNA
• Activation of chemicals

• ATP provides the immediate source of energy for biological processes
• ATP is a phosphorylated nucleotide.
• Each molecule consists of adenosine (adenine and ribose sugar) plus three phosphate (phosphoryl) groups.
• It can be hydrolysed to ADP and Pi releasing 30.6kj energy per mol, so energy is immediately available in small manageable amounts.
• ATP is described as the universal energy currency.

• Glycolysis
• Link Reaction
• Krebs Cycle
• Oxidative Phosphorylation