The three boxes in this diagram represent the three major biosynthetic pathways in

aerobic respiration. Arrow represent net reactants or products

Arrows numbered 4, 8, 12 can all be 

1. NADH

2. ATP

3. H₂O

4. FAD⁺ or FADH₂

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

(1) Glocose-6-phosphate 

(2) Fructose 1, 6, bisphosphate

(3) Pyruvic acid

(4) Acetyl Co-A

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 

1. catabolic 

2. parabolic 

3. amphibolic 

4. anabolic 

Which one of the following mammalian cells is not capable of metabolising glucose to

carbon-dioxide aerobically?

1. White blood cells

2. Unstriated muscle cells

3. Liver cells

4. Red blood cells

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

The overall goal of glycolysis, Krebs cycle and the electron transport system is the

formation of:

1. ATP in small stepwise units

2. ATP in one large oxidation reaction

3. Sugars

4. Nucleic acids

How many ATP molecules could maximally be generated from one molecule of glucose, if

the complete oxidation of one mole of glucose to CO₂ and H₂O yields 686 kcal and the

useful chemical energy available in the high energy phosphate bond of one mole of ATP is

12 Kcal?

1. Two 

2. Thirty

3. Fifty seven

4. One

The TCA cycle is considered as an aerobic pathway because

1. all enzymes of the cycle use molecular oxygen

2. some enzymes of the cycle require molecular oxygen

3. molecular oxygen is essential to reoxidise the coenzymes reduced during operation of

the cycle.

4. in absence of oxygen, the enzymes of TCA cycle are denatured.

In Krebs' cycle, GTP is formed in

1. substrate level phosphorylation

2. oxidative phosphorylation

3. non-cyclic photophosphorylation

4. cyclic photophosphorylation