aerobic respiration

Question 1

what is metabolism

Answer 1

• set of life sustaining chemical reactions
• anabolic- conversation of food to building blocks of protein lipids and carbohydrates
• catabolic- conversion of food to energy
• elimination of nitrogenous wastes

Question 2

what are the three stages of catabolism

Answer 2

• big molecules are broken down into smaller parts
• small molecules are converted into simple units that play a central role in metabolism
• production of ATP from oxidation of acetyl-coa

Question 3

explain the process of glycolysis

Answer 3

• occurs in the cytosol
• phosphorylation of glucose to glucose phosphate
• using the inorganic phosphates from 2 ATP
• hydrolysed to 2 triose phosphate
• 2 triose phosphate oxidised to 2 pyruvate
• 2 NAD reduced
• 4 ATP generated by substrate phosphorylation - the synthesis of ATP by the transfer of a phosphate group from a substrate to a molecule of ADP
• 4 gained 2 used - 2 left ATP

Question 4

what is pyruvate converted into>

Answer 4

• to glucose via gluconeogenesis
• to fatty acids or energy through acetyl- coa
• to lactate
  -To ethanol by converting to acetaldehyde and this to ethanol

Question 5

what is cori cycle

Answer 5

• glucose - muscle - glucose - 2 pyruvate , 2 lactate - glycolysis - 2 lactate -liver - 2 lactate - 2 pyruvate - 6 - ATP - glucose - gluconeogenesis

Question 6

what is the aerobic respiration stage 2

Answer 6

• takes place in the mitochondria matrix
• pyruvate oxidised and decarboxylated into acetate
• CO2 and reduced NAD produced
• acetate combined with coenzyme A- acetyl coenzyme A
  -per glucose molecule - 2 acetyl coenzyme a , 2 co2, 2 reduced NAD