Question

R.Q. for proteins is about
A. 0.7
B. 0.8
C. 0.9
D. 1.0

Answer 1

Hint: Several essential nutritional elements are required for the proper functioning and maintenance of the body of the living organism. These elements either function as single molecules or may join to form complex structures. They are associated with various processes of the living cells.

Complete answer:
Respiratory quotient or RQ is a quantity to which no physical dimension can be related. It is a calculation of BMR or basal metabolic rate. It is estimated from carbon dioxide. Respiratory quotient is calculated as the ratio of carbon dioxide to that of oxygen consumed by the body during several processes. It indicates the metabolism of macronutrients in different energy pathways through which fats, carbohydrates and proteins and the energy contributed. R.Q. is 0.8 for proteins.
RQ values are calculated by deriving the ratio between carbon dioxide eliminated from the body to the amount of oxygen consumed by the body. It corresponds to the calorific values for per liter of carbon dioxide produced in the body. It refers to the oxidation of the protein consumed in the diet.
Proteins are one of the important elements needed for the body and are considered as the building blocks of the body. The amino acids are the monomers that join to form different structures of the protein. Proteins are the polymer chains which are made up of amino acids and the amino acids are joined by bonds known as the peptide bonds. The protein molecules are required for growth and maintenance of the body tissues. They form the main components in the structure of the cells of the body. Proteins form an integral part of the cell membrane and exist as glycoprotein. The breakdown of protein molecules takes place in the gastrointestinal tract and facilitated by several enzymes.
The respiratory quotient for lipid is 0.7 and equalizes to 1.0 for carbohydrates

Therefore, the correct option is option B.

Note: RQ or respiratory quotient is the measurement of production of energy through the oxidation of important macromolecules such as protein, carbohydrates and lipids. The respiratory quotient or RQ for protein is 0.8. They are used in the analysis of different functions of the body such as respiratory function, liver function and pulmonary functions.