Metabolism

Question 1

What does lactate dehydrogenase do

Answer 1

convert pyruvate into lactate

Question 2

If oxygen is available, what can lactate be converted to?

Answer 2

pyruvate

Question 3

Where does Glycoolysis take place?

Answer 3

cytosol

Question 4

Where do the krebs and electron transport chain occur

Answer 4

mitochondria

Question 5

how many ATP does Glycolysis produce (net)

Answer 5

2

Question 6

How many molecules of ATP are produced when a glucose molecule goes through a full cycle of oxidative reactions?

Answer 6

36

Question 7

How are the Krebs cycle and the electron transport Chain connected in the metabolic pathway?

Answer 7

Krebs cycle binds NAD+ and FAD+ with hydrogen ions to ETC

Question 8

What is Pyruvate made into in the first step of the Krebs cycle

Answer 8

Acetyl CoA

Question 9

Oxaloacetic acid is produced by the breakdown of ______ in ______

Answer 9

pyruvate, glycolysis

Question 10

oxaloacetic acid is the pickup molecule for ______ in the Krebs cycle to make citric acid (initial reactant)

Answer 10

Acetyl CoA

Question 11

How is the majorit of lactate produced in skeletal muscle metabolic reactions?

Answer 11

During anaerobic exercise (oxygen isn’t always available) when there are plenty of hydrogen ions available

Question 12

H is oxidized at a relatively steady rate in which type of glycolysis

Answer 12

aerobic

Question 13

Where will Lactate go if it is not immediately converted back to pyruvate?

Answer 13

Liver (cori cycle). there it is converted to pyruvate or glycogen

Question 14

Why are hormones important to fat breakdown

Answer 14

Hormones help produce cyclic AMP which activates hormone-sensitive lipase that starts the breakdown of fat

Question 15

ATP yield per molecule of neutral fat

Answer 15

460

Question 16

Hormone sensitive lipase breaks down triglyceride into

Answer 16

glycerol + 3 Fatty acids

Question 17

1 molecule of glycerol will yield ____ ATP through Glycolysis and Citric acid cycle

Answer 17

19

Question 18

3 molecules of 18-carbon fatty acid will yield ____ molecules of ATP through beta oxidation and krebs cycle (citric acid cycle)

Answer 18

441

Question 19

When is fat breakdown inhibited (3 things)

Answer 19

excess ketones, excess circulating lactate, lack of insulin to mobilize blood glucose

Question 20

What must proteins (amino acids) be converted into before they can go into glycolysis or the krebs cycle?

Answer 20

keto acid

Question 21

Besides Keto acids, what else does amino acids break down into?

Answer 21

NH3 -> urea -> excreted in urine

Question 22

Study the Glycolysis cycle

Answer 22

DO IT

Question 23

Immediate sources of fuel in metabolism

Answer 23

ATP, CP, ADP’s

Question 24

Short term fuel in metabolism

Answer 24

glycolysis- anaerobic

Question 25

What enzyme uses the potential energy of ATP

Answer 25

ATPase - breaks it down into ADP and P