Question

In which of the following respiratory material may show the unit value of R.Q?
(a) Leaf of Green Plant
(b) Leaf of Barley
(c) Leaf Oat
(d) All the above

Answer 1

Hint: The respiratory quotient (R.Q.) is the ratio of the amount of carbon dioxide emitted by an organism to the amount of oxygen consumed.

Complete answer:
- For various respiratory materials, its value is distinct.
- It's worth, for carbohydrates, is 1.
- In the case of fat, its value is 0.7. Its value is 0.8 for proteins.
- The respiratory content for green plant leaves, barley leaves, and oat leaves is carbohydrate. All of them, illustrate the unit value of R.Q.
- When measured from the output of carbon dioxide, the respiratory quotient (or RQ or respiratory coefficient) is a dimensionless number used in basal metabolic rate (BMR) calculations. It is determined from the ratio of body-produced carbon dioxide to body- consumed oxygen.

Additional Information:
- Glucose, which has a 6-carbon compound, is the most common respiratory substrate.
- By glycolysis, the TCA cycle, the electron transport chain, and oxidative phosphorylation, the substrate is metabolized. Cells are able to generate and store ATP through these processes, and carbon dioxide is emitted as a by-product.
- If a mixture of the substrates is consumed, then the collective RQ ratio is 0.8.
- A study found that foods rich in carbohydrates increase carbon dioxide production, leading to an increase in the rate of respiration and ultimately to respiratory failure.
So, the correct answer is, ‘(d) All the above’.

Note:
- The value of the respiratory quotient shows which macronutrients are metabolized, as different energy pathways are used for fats, carbohydrates, and protein.
- Fat- rich meals, on the other hand, minimize carbon dioxide intake, leading to a decrease in alveolar ventilation and a minor increase in respiration in patients with an initial RQ ratio greater than 0.75.