Chapter 7: Regulation of Cellular Respiration

Question 1

when ATP accumulates, ______

Answer 1

the key reactions of glycolysis and krebs cycle are inhibited to slow down ATP production

Question 2

the regulation of these biochemical pathways by the level of ATP is an example of ______

Answer 2

feedback inhibition

Question 3

the 3 points of regulation are:

Answer 3

1. phosphofructokinase
2. pyruvate dehydrogenase
3. citrate synthethase

Question 4

phosphofructokinase is _____

Answer 4

stimulated by high levels of ADP, implying a need to convert more ADP to ATP

Question 5

in pyruvate oxidation, pyruvate dehydrogenase ________

Answer 5

is inhibited by high levels of NADH, indicating no more is needed

Question 6

citrase synthethase is _______

Answer 6

inhibited by high levels of ATP

Question 7

facultative anaerobe

Answer 7

an organism that makes ATP by aerobic respiration if O2 is present but is capable of switching to fermentation or anaerobic respiration if O2 is absent

Question 8

obligate aerobe

Answer 8

an organism that cannot make ATP in the absence of O2

Question 9

obligate anaerobe

Answer 9

an organism that dies in the presence of O2