Understand Electron Transport Chain Functions

NADH and FADH₂ are considered...

• electron carriers

• proton creators

• ATP synthase

• electron transport proteins

In the ETC, hydrogen ions are pumped from the __________ to the ___________.

• matrix; intermembrane space

• intermembrane space; matrix

• matrix; cytoplasm

• intermembrane; cytoplasm

In the electron transport chain, Oxygen acts as...

• a carrier of electrons, passing electrons down the chain

• a reducing agent

• the final electron acceptor

• a coenzyme

A poison which inhibits the activity of any cytochrome (protein complex) in the ETC will result in the following reaction:

• Excess ATP

• oxygen production

• Insufficient ATP

• water synthesis

The effect of increased levels of hydrogen ions in the intermembrane space of the mitochondria is

• Increase ATP production

• Decreased levels of oxidative phosphorylation

• Increased levels of water in intermembrane space

• Decreased levels of chemiosmosis

Electron transport chain is the part of cellular respiration where the most ____________ is/are generated.

• Electron carriers

• NADH/FADH₂

• O₂

• ATP

In ETC, the creation of a hydrogen ion concentration gradient is powered by...

• the movement of H+ across the membrane

• the passing of electrons donated by NADH and FADH₂ through the ETC proteins

• The creation of water from hydrogen ions and oxygen

• The production of ATP by ATP Synthase

H+ moves through ATP Synthase from ___________ concentration in the intermembrane space to ___________ concentration in the mitochondrial matrix.

• high; low

• low; high

• neutral; charged

• charged; neutral

ATP synthesis by ATP synthase is driven by

• H⁺ movement

• electron movement

• NADH movement

• FADH₂ movement

As electrons travel down the electron transport chain, they release

• ADP

• Energy

• ATP

• Hydrogen ion