Respiration - 1

It contains high energy bonds and liberates high amount of energy on hydrolysis. It produces 7.5 kcal of energy when one phosphate group is broken and gets converted into ADP.

R.Q. is the ratio of the volume of CO₂ released to the volume of O₂ absorbed during respiration.

The ratio of the volume of carbon dioxide released to the volume of oxygen consumed by a body tissue or an organism in a given period is known as the respiratory quotient. The R.Q, in the absence of O₂ during anaerobic respiration, is always infinitive. Hence, it is the correct answer.

R.Q. for carbohydrates is the volume of CO₂ released to the volume of O₂ consumed, i.e. 6CO₂/6O₂ = 1.

Very less amount of energy, i.e. 21 kcal is produced in anaerobic respiration.

2 molecules of ATP are utilised during the start of glycolysis.

In anaerobic respiration, food materials are incompletely oxidised into CO₂ and simple organic substances like alcohol.

3-PGA is isomerised into 2-PGA in the presence of phosphoglyceromutase enzyme.

Cytochrome is involved in electron transport chain as it has the ability to undergo reversible oxidation.

2 moles of pyruvic acid are produced by 1 molecule of glucose in the end of glycolysis.

Glycolysis starts with the phosphorylation of glucose in G-6-P by using two ATP molecules in the presence of hexokinase enzyme.

Acetyl CoA acts as a connecting link between glycolysis and Kreb's cycle. In mitochondrial matrix, pyruvate combines with CoA to form acetyl CoA.

Kreb's cycle takes place in matrix of mitochondria. Hence, all enzymes for Kreb's cycle is found in mitochondria.

Lactic acid, which is produced due to anerobic respiration, accumulates in the muscles after vigorous exercise and leads to muscular fatigue. Hence, it is the correct option.

On complete oxidation, one molecule of acetyl coenzyme A produces 15 molecules of ATP in Kreb's cycle. Hence, this is correct.