If the substrate is an organic acid, the RQ is greater than unity because organic acids are richer in O2, and hence require less O2 for respiration. Depending upon the substrate being oxidized, RQ values for fresh commodities range from 0.7 to 1.3 for aerobic respiration (Kader 1987; Beaudry et al.
RQ slightly more than unity is found when organic acids are broken down as respiratory substrates under aerobic conditions,e.g., Was this answer helpful?
ADVERTISEMENTS: RQ Equal to Unity: Respiratory quotient is equal to unity if carbohydrates are the respiratory substrate and the respiration is aerobic.
When respiratory quotient (RQ) is less then one in a respiratory metabolism, it means that respiratory substrate is either fat or protein.
for complete oxidation. of RQ of fats is found to be about 0.7, i.e., less than unity.
The RQ of anaerobic respiration is infinite. This is because, in anaerobic respiration, the total volume of oxygen consumed is zero as this process occurs in the absence of oxygen and only carbon dioxide is produced. Therefore : RQ = CO2 / O2 = 2/0 = infinity.
value of organic acids is greater than one because they already have a good amount of oxygen in their molecule that can be oxidised which decreases the requirement of external O2. So, correct the answer is 'Organic acid'.
Respiratory quotient may be defined as the ratio between the volume of carbon dioxide given out and oxygen consumed during respiration.
The respiratory quotient is less than one in fats.
If the respiratory substrate is fat, then Respiratory quotient of the respiring cells will be less than 1, because the volume of CO2 evolved is quite less in comparison to the volume of O2 being consumed.
The respiratory quotient depends upon the type of respiratory substrate used during respiration. When carbohydrates are used as substrate and are completely oxidised, the RQ will be 1, because equal amounts of CO2 and O2 are evolved and consumed, respectively. When fats are used in respiration, the RQ is less than 1.
The respiratory quotient (RQ) is used in the calculations of basal metabolic rate (BMR). It is the ratio of the volume of carbon dioxide produced by the body to the volume of oxygen consumed by the body in respiration over a period of time. It depends on the type of respiratory substrate used during respiration.
Underfeeding is marked by a respiratory quotient below 0.85, while a respiratory quotient greater than 1.0 indicates overfeeding.
The value of respiratory quotient depends on the type of respiratory substrate. Its value is one for carbohydrates. However, it is always less than one for fats as fats consume more oxygen for respiration than carbohydrates.
Respiratory quotient or R.Q is defined as the ratio of carbon dioxide evolved to oxygen taken in for respiratory break down of a substrate. The value of R.Q for oxidation of carbohydrates is unity and less than one for oxidation of fats and proteins.
In anaerobic respiration, oxygen is not consumed and carbon dioxide is released. This gives the RQ quotient to be infinite.
Lactic acid fermentation
Respiratory quotient (R.Q): The ratio of volume of carbon dioxide liberated and the volume of oxygen consumed during respiration is known as respiratory quotient.
There are two types of Respiration: Aerobic Respiration — Takes place in the presence of oxygen. Anaerobic Respiration –Takes place in the absence of oxygen.
The carbohydrates have equal numbers of carbon and oxygen in their molecules. When carbohydrates are used as substrate, then the RQ will be 1, because equal amounts of carbon dioxide and oxygen are evolved and consumed. Fats and proteins contain a smaller number of oxygen atoms than carbon atoms in their molecules.
Solution : The ratio of the volume of `CO_(2)` produced to the volume of `O_(2)` used in a unit time is called respiratory quotient (RQ) . RQ for carbohydrates , fats and proteins is 1, 07 and 0,85 respectively .
The RQ value of carbohydrates is 1.0, fats are 0.7, proteins is 0.8.
Germinating seeds exhibit the highest rate of respiration.
Seeds do not possess the required photosynthetic abilities/resources to synthesize their own energy. Hence, there is a high rate of consumption of oxygen in seeds that are germinating as they are living and need extra oxygen to grow.
The highest rate of respiration are found in the actively growing root and stem tips, cambium and embryos of germinating seeds and lowest rates in dormant seeds or spores. As, the growing tips are generally rich in meristematic tissues the rate of respiration is also high.
The RQ is helpful in guiding the planning of nutritional therapy. The physiologic range for RQ values is 0.7 to 1.2 and is influenced by the relative contribution from fat, protein, and carbohydrate. RQ values for fat, protein, and carbohydrate are 0.7, 0.8, and 1.0, respectively.
Respiratory quotient (RQ) , which is also known as respiratory ratio is basically defined as the volume of Carbon dioxide released over the volume of Oxygen absorbed during respiration. It is dimensionless number. The RQ value for carbohydrates is 1.0 whereas for proteins it is 0.8 . Hope this helps !