Electron Flow

Question 1

What are the main 5 things on a cell’s metabolic checklist?

Answer 1

Carbon source
Energy source
Electron source
NADH reducing power
PMF

Question 2

NADH & FADH2 can donate ____ to an ___ via catabolism

Answer 2

electrons, ETC

Question 2

What are the simple steps of an ETC?

Answer 2

1. Initial oxidoreductase or deydrogenase
2. Mobile electron carrier
3. Terminal oxidase

Question 3

What is a proton motive force?

Answer 3

The force created by the H+ gradient that drives ATP production and powers active transport

Question 4

What is the process used by ATP synthase to generate ATP?

Answer 4

Oxidative phosphorylation

Question 5

What is oxidative phosphorylation?

Answer 5

It uses the reducing power of oxygen to create the high energy bond that makes ATP

Question 6

T/F Oxidative phosphorylation happens only in aerobic conditions?

Answer 6

False - it can occur in either aerobic or anaerobic environments

Question 7

When isn’t O2 the terminal electron acceptor?

Answer 7

In anaerobic respiration

Question 8

How do cells donate and accept electrons when oxygen is not present?

Answer 8

Use the strongest available donor and the acceptor that gives the most ATP

Question 9

Uses inorganic molecules as sources of electrons and energy?

Answer 9

Chemolithotrophs

Question 10

The best electron donors are more (positive or negative)?

Answer 10

Negative

Question 11

Uses light as energy and gains electrons from organic OR inorganic molecules

Answer 11

Phototrophs

Question 12

What is photophosphorylation?

Answer 12

using the PMF to generate ATP with energy from light reactions

Question 13

Photosystem 1 (PS I)

Answer 13

anoxygenic & anaerobic - generates PMF and NADPH

Question 14

Photosystem 2 (PS II)

Answer 14

anoxygenic - generates PMF, uses reverse electron flow to generate NADPH

Question 15

Oxygenic Photolysis

Answer 15

Combines PS I & PS II to generate a PMF and NADPH, also produces O2