Cell Metabolism

Question 1

steps of glucose metabolism (catabolism)

Answer 1

1. glycolysis
2. cellular respiration (aerobic) or fermentation (anaerobic)
3. electron transport chain

Question 2

lipid metabolism (catabolism)

Answer 2

occurs in liver via beta-oxidization process
primarily used for low energy activities
produces 2x ATP as carb/protein breakdown

Question 3

result of glucose metabolism

Answer 3

1 glucose molecule –> up to 38 ADP

Question 4

steps of lipid metabolism

Answer 4

1. fat broken down –> acetic acid
2. TCA cycle: acetic acid –> CO2 + ATP
3. electron transport: H –> H2O + energy –> energy used to add phosphate to ADP –> ATP

Question 5

protein metabolism (catabolism)

Answer 5

only occurs when no carbs/fat are available

Question 6

steps of protein metabolism

Answer 6

1. amino group removed from protein –> ammonia
2. TCA cycle: ammonia –> CO2 + ATP
3. electron transport: H –> H2O + energy –> energy used to add phosphate to ADP –> ATP
4. excess ammonia –> urea (in liver, bc ammonia = harmful to body)
5. urea excreted from body in urine