alternative respiratory substrates

• Why is acetyl CoA important?


  it links glucose , fatty acids and amino acid metabolism
• what is meant by acetyl COA


  acetyl coenzyme
• give three examples molecules that can be used as respiratory substrates


  glucose , lipids and proteins
• which respiratory substrates will require more certain circumstances


  lipids and proteins
• what is meant by a respiratory substrate


  this is a molecule that can be oxidised through respiration to fuel the synthesis of ATP
• what does a triglyceride look like

  
• What is a tryglyceride composed of?


  1 glycerol and 3 fatty acids
• what bonds are used to hold the glycerol and fatty acids together

  an ester bond
• how is an ester bond formed between a fatty acid and a glycerol molecules


  a condensation reaction
• give three roles of lipids in living organisms


  energy storage , thermal insulation and protection from damage
• give an example of how lipids can store energy


  in seeds
• What does an amino acid look like?

  
• what are the three groups that make up a amino acid


  a carboxly group , a amine group and a variable group
• list some roles of proteins in living organisms


  globular proteins, hormones , antibodies, haemoglobin , carrier proteins , fibrous proteins