Electron Transport Chain

What is the definition of electron transport chain.

• The process in which ATP is form as a result of the transfer of electrons from NADH and FADH2 occurs at the inner membrane of the mitochondrion of eukaryotes by a series of electron carriers.

• A sequence of electron carrier molecules embedded in inner membrane of mitochondria that shuttle electrons down a series of redox reactions that release energy used to make ATP.

• Energy-coupling mechanism that uses energy stored in the form of an H+ gradient across a membrane to drive cellular work.

• High concentration of proton (H+) in the intermembrane space of mitochondria resulting in proton gradient across the membrane known as proton-motive force.

Is it a must for ETC to occurs before chemiosmosis?

• Yes, it's a must.

• No, it's not a must.

Why ETC must occur first before chemiosmosis?

• to produce H2O

• to produce ATP

• to create proton-motive force

How many mobile electron carrier in ETC?

• 3

• 4

• 1

• 2

How many proton pump protein in ETC?

• 3

• 2

• 4

• 1

What will happen if there is a leakage in the inner membrane of mitochondria.

• no proton-motive force will be created

• chemiosmosis will be delayed

• no ATP will be produced

• no H2O will be produced

what is the last electron acceptor in ETC.

• H2O

• Oxygen

• Ubiquinone

• ATP Synthase

How much ATP will be generated from NADH?

• 1

• 4

• 3

• 2

How much ATP will be generated from FADH2?

• 2

• 4

• 1

• 3

ETC occurs in ___.

• in mitochondria

• matrix of mitochondria

• in cytoplasm

• inner membrane of mitochondria