cellular respiration - exam 2

Question 1

cellular respiration

Answer 1

turns potential energy stored in chemical bonds of food molecules to the energy currency of the cell

Question 2

where is potential energy stored

Answer 2

covalent bonds of organic molecules

Question 3

mitochondria structure

Answer 3

outer & inner mitochondrial membrane

folds = cristae
increasse surface area

intermembrane space

matrix

Question 4

substrate level phosphorylation

Answer 4

a molecule w/ a phosphate attached & an ADP enter an enzyme

produces a dephosphorylated cell & ATP

accounts for all ATP made in glycolosis & citric acid cycle

Question 5

electron shuttles

Answer 5

NAD+ & FAD

take electrons from food to electron transport chain

picks up electrons & protons

Question 6

glycolosis

Answer 6

cytosol

input: glucose + 2 ATP (from substrate level phos)

output: 2 pyruvate + 2 ATP + 2NADH

Question 7

pyruvate processing

Answer 7

matrix of mitochondria

input: pyruvate molecule

output: Acetyl coA + CO2 + NADH

happens 2x – once for each pyruvate

Question 8

citric acid cycle

Answer 8

matrix of mitochondria

input: Acetyl coA

output: 2CO2 + 3NADH + 1ATP + 1FADH

happens 2x – once for each pyruvate

Question 9

total CO2 after citric acid cycle

Answer 9

6

Question 10

total NADH after citric acid cycle

Answer 10

10

Question 11

total ATP after citric acid cycle

Answer 11

4

Question 12

total FADH2 after citric acid cycle

Answer 12

2

Question 13

oxidative phosphorylation

Answer 13

mitochondria

Question 14

why does NAD make more ATP than FAD

Answer 14

FADH2 enters electron transport chain at II

II is off to the side & it is NOT a proton pump

it produces less ATP because it enters the chain later than NAD