Which statement is wrong for Krebs cycle?
1. There are three points in the cycle where ${\mathrm{NAD}}^{+}$ is reduced to NADH + ${\mathrm{H}}^{+}$
2. There is one point in the cycle where ${\mathrm{FAD}}^{+}$ is reduced to ${\mathrm{FADH}}_2$
3. During conversion of succinyl Co-A to succinic acid, a molecule of GTP is synthesised
4. The cycle starts with condensation of acetyl group (acetyl Co-A) with pyruvic acid to yield citric acid

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 release from electrons removed during substrate oxidation

In which one of the following processes ${\mathrm{CO}}_2$ is not released?
1. Aerobic respiration in plants
2. Aerobic respiration in animals
3. Alcoholic fermentation
4. Lactate fermentation

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

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

The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
1. glycolysis
2. fermentation
3. aerobic respiration
4. photorespiration

Aerobic respiratory pathway is appropriately termed

The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because
1. high energy bonds are formed in mitochondrial proteins
2. ADP is pumped out of the matrix into the intermembrane space
3. a proton gradient forms across the inner membrane
4. there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)

Which one of the following mammalian cells are not capable of metabolising glucose to carbon dioxide aerobically?

All enzymes of TCA cycle are located in the mitochondrial matrix except one which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is
1. lactate dehydrogenase
2. isocitrate dehydrogenase
3. malate dehydrogenase
4. succinate dehydrogenase