Respiration in Plants Test - 8

The two molecules of pyruvic acid (produced from one glucose molecule during glycolysis). The acetyl CoA then enters a cyclic pathway, tricarboxylic acid cycle, more commonly called as Krebs’ cycle. Thus, acetyl-CoA is interconnecting between two cyclic pathways.

When proteins are respiratory substrates the ratio would be about 0.8.

Due to the complexity of the various ways in which different amino acids can be metabolized, no single RQ can be assigned to the oxidation of protein in the diet; however, 0.8 is a frequently utilized estimate.

During breakdown and synthesis of protein too, respiratory intermediates form the link. Breaking down processes within the living organism is catabolism, and synthesis is anabolism. Because the respiratory pathway (Kreb’s cycle) is involved in both anabolismand catabolism, it would hence be better to consider the respiratory pathway.

The ratio of the volume of carbon dioxide evolved to the volume of oxygen consumed in respiration is called the respiratory quotient(RQ) or respiratory ratio.

The respiratory quotient depends on the type of respiratory substrate used during the act of respiration. Additionally, the respiratory quotient is a dimensionless number used in the calculations of the basal metabolic rate or BMR when estimated from the carbon dioxide production.

ATP is known as energy currency of living cells because energy produced during respiration is stored in form of ATP , which can be utilized for performing different activities.

Most common respiratory substrate is glucose. Glucose get oxidized completely to produce carbon dioxide and water along with ATP molecules.

Respiratory quotient is the ratio of the volume of carbon dioxide produced to the volume of oxygen consumed in respiration over a period of time. Its value can be one, zero, more than 1 or less than one.

RQ is less than one when respiration is aerobic but the respiratory substrate is either fat or protein.

Pyruvate produced during Glycolysis is changed into Acetyl Co A for Kreb’s cycle to proceed further to combine with oxaloacetate molecule, a six carbon compound.