Question

1. The enzymes involved in the electron transport chain are located in the: A) Mitochondrial matris B) Mitochondrial inner-membrane Mitochondrial inner-membrane space D) Mitochondrial outer-membrane 2. Which of the following is not classified as a micronutrient? A) Vitamins B) Antioxidants C) Minerals D) Water 3. The metabolic reaction pathways that break down food molecules are known as: A) Anabolism and release biochemical energy B) Anabolism and require biochemical energy Catabolism and release biochemical energy D) Catabolism and require biochemical energy 4. In the pathways for the digestion of food and the production of biochemical energy, the oxidation of Acetyl-SCRA occurs in: A) Stage 1 B) Stage C) Stage 3 D) Stage 4 5. Which of the following is true of the NAD/NADH system? A) NAD is the oxidized form and NADH is the reduced form B) NAD is the reduced form and NADH is the oxidized form C) The conversion of NAD to NADH is a dehydrogenation reaction D) The conversion of NAD to NADH is a substitution reaction

Answer 1

1)

B) Mitochondrial inner-membrane

The enzymes of the Electron transport chain transfer protons from the Mitochondrial matrix to the inter-membrane space and this proton gradient allows mitochondria to generate ATP.

2)

D) Water

Water is required in large quantities and is not a micronutrient.

3)

C) Catabolism and release biochemical energy

Catabolism is the name for the set of reatctions which release energy by breaking down complex substances into simpler ones.

4)

C) Stage 3

In the production of Biochemical energy:

Stage 1: Digestion of large biomolecules to smaller ones
Stage 2: Production of Acetyl-SCoA as an intermediate
Stage 3: Oxidation of Acetyl-SCoA during the Krebs cycle
Stage 4: ATP production, which produces the most energy

5)

A) NAD is the oxidized form and NADH is the reduced form

NAD and NADH are molecules that serve as key energy-sensing molecules. High levels of the reduced form NAD signal depletion of Energy in the cell, while high levels of NADH , the reduced form signal energy abundance.