Explain how oxygen is loaded, transported and unloaded in red blood cells
Haemoglobin is a molecule in red blood cells with a high affinity for oxygen. It consists of 4 haem groups, each of which associate with one oxygen molecule at high pO2, typically in the lungs. Haemoglobin dissociates from oxygen in respiring tissues, where there is a low pO2. Unloading of oxygen is linked to a higher carbon dioxide concentration.
Related Biology A Level answers
All answers ▸How does the electron transport chain operate during respiration?
Mr & Mrs Smith have a child who has Cystic Fibrosis, yet they do not personally suffer from the condition. Explain, with the use of genetic crosses, how this is possible and, if they had another child, how likely the second child will have Cystic Fibrosis
Describe the structure of a protein
In a population of 1000 lemmings there are two alleles for skin colour, the dominant colour being cream (C) and the recessive being white (c). 350 individuals have white skin. Use Hardy-Weinberg to predict the number of homozygous recessive individuals.