Oxygen is a vital and constant presence on Earth today. But that hasn't always been the case. It wasn't until around 2.3 ...

Aerobic respiration began hundreds of millions of years earlier than previously thought, a new study suggests.

Researchers in Japan have clarified the crystal structure of quinol dependent nitric oxide reductase (qNOR), a bacterial enzyme that offers clues on the origins of our earliest oxygen-breathing ...

The questions in this quiz are suitable for GCSE combined science students studying cellular respiration, aerobic and anaerobic respiration, oxygen debt, and metabolism. If you struggled with the quiz ...

Breathing refers to the physical act of inhaling and exhaling air through the lungs. It involves the movement of air in and out of the body, which is facilitated by the diaphragm and other muscles of ...

In obese individuals, endurance exercise improves fitness and increases the number of mitochondria and cellular respiration in skeletal muscles. However, the intervention has no effect on cellular ...