Question

Protein efficiency ratio is not based on:

• A. Intake of plant protein
• B. Intake and output of food protein residues
• C. Output of protein
• D. Intake of animal protein

Hint:

Remember that the Protein Efficiency Ratio (PER) is based on the weight gain of an animal per unit of protein consumed, not on the protein residues or output.

Answer 1

The Correct Option is B

The Protein Efficiency Ratio (PER) is a measure of protein quality. It is used to assess the effectiveness of protein sources based on weight gain in test animals (usually rats) when they are fed a particular protein. The PER is calculated as the ratio of weight gain to the amount of protein consumed. It is used to evaluate how well a protein supports growth.
- Intake of plant protein: Plant protein intake is considered in the calculation of PER, as it helps assess the efficiency of plant proteins for growth.
- Intake and output of food protein residues: Correct! PER is not based on the output or residues of food proteins, as this does not directly correlate to growth or the efficiency of the protein for that purpose.
- Output of protein: The output of protein, or the effect of protein on weight gain, is a factor in determining PER, as the ratio is based on protein intake and the weight gain observed.
- Intake of animal protein: Animal protein intake is similarly considered in the PER, as it also contributes to weight gain in test animals.
Thus, the correct answer is (2) Intake and output of food protein residues.