Electron transport and oxidative phosphorylation II

Question 1

Four ways to transfer electrons from donor to acceptor?

Answer 1

Directly as electrons
As hydrogen atoms
As a hydride ion (:H-)
Direct combination with oxygen

Question 2

What type of electron transport does not occur in oxidative phosphorylation?

Answer 2

Direct combination with oxygen

Question 3

Example of transferring electrons directly as electrons?

Answer 3

Fe2+ + Cu2+ <—->Fe3+ + Cu+

Question 4

Example of transferring electrons as hydrogen atoms?

Answer 4

AH2 <—->A + 2e- + 2H+

Question 5

Example of transferring electrons as hydride ions?

Answer 5

Moving a :H- (which comprises a proton and two electrons)

Question 6

What does redox potential measure?

Answer 6

measure of the tendency of a chemical species to acquire electrons from or lose electrons to an electrode

Question 7

What can be said about a compound/ion if it has a negative redox potential?

Answer 7

Strong reducing agent

Question 8

What can strong reducing agents do?

Answer 8

Easily donate electrons (cause the other thing to be reduced)

Question 9

What can be said about a compound/atom if it has a positive redox potential?

Answer 9

Strong oxidising agent

Question 10

What can strong oxidising agents do?

Answer 10

Easily accept electrons (cause the other thing to be oxidised)

Question 11

What pH are standard redox potentials measured at?

Answer 11

7