Question

If the rate of cellular respiration in a small mammal was studied at 21°C and 10°C, which temperature is associated with the fastest rate of cellular respiration?

1) 21°C
2) 10°C

Answer 1

The rate of cellular respiration is generally faster at 21°C than at 10°C due to increased enzyme activity at the warmer temperature. While cold conditions may lead to higher oxygen consumption in an effort to maintain body temperature, this is not an indicator of more efficient respiration. The correct option is 1.

Step-by-step explanation:

The rate of cellular respiration is generally faster at higher temperatures due to enzyme activity that facilitates metabolic processes. At 21°C, the rate of cellular respiration in a small mammal would likely be faster compared to 10°C.

Cellular respiration is a biochemical process where cells convert nutrients into energy, and this involves multiple stages, such as glycolysis, the Krebs cycle, and oxidative phosphorylation. The mitochondrion is crucial for this process, as it is where the Krebs cycle and oxidative phosphorylation occur.

When organisms like mice are in a colder environment, they may exhibit a higher oxygen consumption per gram of tissue to maintain their body temperature, leading to a temporary increase in the metabolic rate.

However, this does not necessarily mean that the rate of cellular respiration is more efficient at colder temperatures, rather it is an adaptation for thermoregulation. The correct option is 1.