Biochemistry

Question 1

what is the equation to calculate the pH of a weak acid

Answer 1

pH = pKa + log(A-)/(HA)

Question 2

glycolysis occurs in the

Answer 2

cytoplasm

Question 3

which stages of glycolysis are control stages as they are irreversible

Answer 3

1st, 3rd and last stages

Question 4

what is the first step in glycolysis and which enzyme regulates it

Answer 4

glucose — glucose-6-phosphate

hexokinase

Question 5

what is the third step in glycolysis and which enzyme regulates it

Answer 5

fructose-6-phosphate — fructose-1,6-biphosphate

phosphofructokinase

Question 6

what is the final step in glycolysis and which enzyme regulates it

Answer 6

phosphophenolpyruvate — oyruvate

pyruvate kinase

Question 7

what is the net ATP gain after glycolysis

Answer 7

2ATP

Question 8

factors decreasing the rate of glycolysis include

Answer 8

high ATP, high citrate and high H+

Question 9

factors increasing the rate of glycolysis include

Answer 9

high AMP (low energy

Question 10

what substrate starts off the TCA

Answer 10

Acetyl-CoA

Question 11

what happens for the conversion of pyruvate to acetyl-CoA

Answer 11

CO2 is removed

NADH - NAD+ also comes off

Question 12

at the end of the TCA (including glycolysis) how many NADH+, CO2, ATP and FADH are made

Answer 12

10
6
4
2

Question 13

during once TCA cycle how many NADH+ and FADH are made

Answer 13

NADH+ = 3
FADH = 1

Question 14

function of glycolysis is

Answer 14

to generate pyruvate

Question 15

fermentation is a reversible/irreversible pathway

Answer 15

reversible

Question 16

what is the purpose of NADH+ in the fermentation pathway

Answer 16

to keep being regenerated and help ferment pyruvate into lactate

Question 17

where does the TCA occur

Answer 17

matrix of the cytoplasm

Question 18

GLUT3 is located in the

Answer 18

brain

Question 19

GLUT5 in located in the

Answer 19

gut