Respiration in Plants · Question 19

What is the role of NAD+ in cellular respiration?

1. It is the final electron acceptor for anaerobic respiration.
2. It functions as an enzyme.
3. It functions as an electron carrier.
4. It is a nucleotide source for ATP synthesis.

Which of these statements is incorrect?

1. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
2. Enzymes of TCA cycle are present in mitochondrial matrix.
3. Oxidative phosphorylation takes place in outer mitochondrial membrane.
4. Glycolysis occurs in cytosol.

Which statement is wrong for Krebs' cycle?

1. There is one point in the cycle where FAD+ is reduced to FADH2.
2. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised.
3. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
4. There are three points in the cycle where NAD+ is reduced to NADH + H+.

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

1. Glucose-6-phosphate
2. Fructose 1, 6-bisphosphate
3. Pyruvic acid
4. Acetyl CoA

Oxidative phosphorylation is

1. formation of ATP by transfer of phosphate group from a substrate to ADP
2. oxidation of phosphate group in ATP
3. addition of phosphate group to ATP
4. formation of ATP by energy released from electrons removed during substrate oxidation.

Cytochromes are found in

1. cristae of mitochondria
2. lysosomes
3. matrix of mitochondria
4. outer wall of mitochondria.

In which one of the following processes CO2 is not released?

1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactic fermentation

Which of the metabolites is common to respiration-mediated breakdown of fats, carbohydrates and proteins?

1. Pyruvic acid
2. Acetyl CoA
3. Glucose-6-phosphate
4. Fructose-1,6-bisphosphate

The three boxes in this diagram represent the three major biochemical pathways in aerobic respiration. Arrows represent net reactants or products. [figure] Arrows numbered 4, 8 and 12 can all be

1. H2O
2. FAD or FADH2
3. NADH
4. ATP.

In mitochondria, protons accumulate in the

1. outer membrane
2. inner membrane
3. intermembrane space
4. matrix