Efficiency and Regulation of C.R

Question 1

Control Production

Answer 1

• Rate of oxygen consumption
• Rate of sugar oxidation
• Excess ATP -binds to phosphofructokinase and inhibits action in glycolysis

Question 2

Phosphofructokinase

Answer 2

• catalyzes step 3 of Glycolysis, controlling C.R.
• activated by ADP and inhibited by ATP
• NADH inhibits pyruvate decarboxylase and prevents Acetyl-CoA from forming

Question 3

Feedback Inhibition

Answer 3

end products of pathway inhibit an enzyme early in the pathway

Question 4

When there is a good supply of ATP…

Answer 4

excess sugars covert into or stored as fat molecules or as glycogen in the muscle

Question 5

Fats

Answer 5

• before oxidative rxn, hydrolyzed into glycerol and individual fatty acids
• glycerol covered into G3P before entering glycolysis
• fatty acid split into 2 C, enter citric acid cycle as acetyl group attached to CoA

Question 6

Proteins

Answer 6

• hydrolyzed into amino acids
• amino group removed, reminder enter as pyruvate, acetyl, intermediates of citric cycle (depending on R group/carbon backbone)