Bacteria are used to break down organic waste in a sealed anaerobic digestor. There is no oxygen inside this digestor. How will the lack of oxygen affect the bacteria inside the digestor?
Bacteria that respire using anaerobic respiration will be active.
Most bacteria will respire aerobically, and some will respire anaerobically.
Only bacteria that respire using aerobic respiration will be active.
The bacteria will not be able to respire, so all the bacteria will die.
113 exam-style questions on OCR GCSE Biology 1.3 Respiration, covering 1.3.1 Cellular respiration supplies ATP, 1.3.2 Aerobic and anaerobic respiration, 1.3.3 Sugars and carbohydrates, 1.3.4 Amino acids and proteins, and 1.3.5 Fatty acids and lipids. Each one has a worked solution and a mark scheme showing where the marks go.