Electron Transport Chain (ETC)

Which of the following is an electron donor for Complex II in electron transport chain?

• NAD+

• FADH2

• NADH

• FAD

How do mitochondria keep the chemiosmotic gradient that the electron transport chain relies on?

• They bring protons from the cytoplasm into the cell

• Scaffold proteins transport protons into the intermembrane space

• They constantly pump protons into the intermembrane space

• They export protons into the cytoplasm

What is the main job of the electron carriers in cellular respiration?

• Transport electrons and hydrogen atoms to the electron transport chain

• Provide the reactants for the process of cellular respiration

• Capture energy throughout the process of cellular respiration

During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for ______

• Complex I

• Complex II

• Complex III

• Complex IV

Tags

NGSS.HS-LS1-7

The ETC makes water. To make this water, where do the hydrogen atoms come from?

• Glucose

• Oxygen

• Pyruvate

• NADH and FADH₂

The protein pumps in the ETC are arranged in order of ____ electronegativity

• Increasing

• Decreasing

Protons are pumped out of the _________ in the ETC

• Matrix

• Cristae

• Intermembrane space

• Mitochondrion

Tags

NGSS.HS-LS1-7

NADH dehydrogenase, the first stop in the electron transport chain, is located in which of the following areas?

• Cell wall

• Intermembrane space

• Cytosol

• Inner mitochondrial membrane

Tags

NGSS.HS-LS2-5

Cytochrome oxidase_________

• Uses H2O as a substrate

• Produces HOOH as a product

• Cannot function if oxygen is absent

• Accepts electrons from hydrogen ions

Tags

NGSS.HS-LS2-3

Name two mobile carriers that are involved in Electron Transport Chain

• Ubiquinone

• Plastocyanin

• Plastoquinone

• Cytochrome c

Tags

NGSS.HS-LS1-7