The respiratory chain

Question 1

The electron transport is a chain of special redox carriers that receives reduced carriers (NADH, FADH2) generated by

Answer 1

glycolysis and the Krebs cycle:
Passes them in a sequential and orderly fashion from one to the next
Highly energetic
Allows the transport of hydrogen ions outside of the membrane
In the final step of the process, oxygen accepts electrons and hydrogen, forming water.

Question 2

Principal compounds in the electron transport chain include

Answer 2

NADH dehydrogenase
Flavoproteins
Coenzyme Q (ubiquinone)
Cytochromes

Question 3

Contain a tightly bound
metal ion in their center that is actively
involved in accepting electrons and
donating them to the next carrier in the
series.

Answer 3

cytochromes

Question 4

Where are electron transport carriers and enxymes embedded

Answer 4

Embedded in the cell membrane in prokaryotes and on the inner mitochondrial membrane

Question 5

Released energy from electron carriers in the electron transport chain is channeled through

Answer 5

ATP synthase
Oxidative phosphorylation: the coupling of ATP synthesis to electron transport

Question 6

Each NADH that enters the electron transport chain can give rise to

Answer 6

3 atps

Question 7

Electrons from FADH2 enter the electron transport chain at a later point and have less energy to release, so only

Answer 7

2 ATPs result

Question 8

The incomplete oxidation of glucose or other carbohydrates in the absence of oxygen
Uses organic compounds as the terminal electron acceptors
Yields a small amount of ATP
Used by organisms that do not have an electron transport chain

Answer 8

Fermentation