6) NADH and FADH2 differ in that: Only NADH involves transfer of electrons from

Question

6) NADH and FADH2 differ in that:

Only NADH involves transfer of electrons from Complex I to Ubiquinone/CoQ.

Only NADH transfers electrons through Complex II.

NADH has a higher reduction potential.

Only NADH results in pumping of H+ it the intermembrane space.

7) DNP was a very effective diet aid introduced in the 1930’s, but it was nearly immediately taken off the market after several users died of acute hyperthermia (overheating). Why would DNP cause hyperthermia?

Individuals taking it would have the sensation of increased energy and would therefore become extremely physically active, increasing their body temperature.

The energy resulting from the increased metabolic rate would be released as heat.

Protons flowing down their concentration gradient is an exergonic process, the energy from which, when not captured by ATP Synthase, is released as heat.

Rapid oxidation of NADH and FADH2 would be uncoupled from proton transport and the energy from these reactions would be released as heat.

8) Transport of H+ across the membrane by the F0 portion of the ATP Synthase complex is an example of _____ :

Simple diffusion

Facilitated diffusion

Direct active transport

Indirect active transport

9) True or false: in aerobic organisms, all of the ATP that can be produced through glucose catabolism in the absence of O2 comes from glycolysis.

True

False

10) Why is O2 required for aerobic metabolism, but not for production of ATP? (read answer choices carefully!)

Because O2 is the last electron acceptor in the electron transport system, O2­ is necessary for electron transport, and thus oxidative phosphorylation. However, both glycolysis and the Citric Acid Cycle can continue without O2, enabling the cell to continue producing small amounts of ATP through substrate-level phosphorylation.

Because O2 is the last electron acceptor in the electron transport system, O2­ is necessary for electron transport, and thus oxidative phosphorylation. However, glycolysis can continue in its absence, enabling the cell to continue producing small amounts of ATP through substrate-level phosphorylation.

Because O2 is the last electron acceptor in the electron transport system, it is required for electron transport, and thus substrate-level phosphorylation. However, glycolysis and the Citric Acid Cycle can continue it its absence, enabling the cell to continue producing small amounts of ATP through oxidative phosphorylation.

Because O2 is the last electron acceptor in the electron transport system, it is required for electron transport, and thus substrate-level phosphorylation. However, glycolysis can continue in its absence, enabling the cell to continue producing small amounts of ATP through oxidative phosphorylation.

Explanation / Answer

Answer:

6). NADH has a higher reduction potential.

Explanation:

NADH supplies electrons from complex I to oxygen whereas FADH2 supplies electrons from complex II to oxygen. So that NADH transfer higher number of protons from matrix to intemembrane space.

7). Protons flowing down their concentration gradient is an exergonic process, the energy from which, when not captured by ATP Synthase, is released as heat.

8). Facilitated diffusion

Explanation: Trasport of the molecules or ions through carrier molecules(ATPase) is called facilitated diffusion.

9). False

Explanation:

Aerobic organism means that they produce energy from aerobic cellular respiration in the presence of oxygen.

10).

Because O2 is the last electron acceptor in the electron transport system, O2­ is necessary for electron transport, and thus oxidative phosphorylation. However, both glycolysis and the Citric Acid Cycle can continue without O2, enabling the cell to continue producing small amounts of ATP through substrate-level phosphorylation.

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