A mature red blood cell does not contain a nucleus. How does this help the cell carry out its function?
It provides more space for digestive enzymes.
It provides more space for oxygen-binding haemoglobin.
It provides more space for antibody-producing structures.
It provides more space for dissolved urea molecules.
42 exam-style questions on Edexcel GCSE Biology 8.2 Blood and circulation, covering 8.2.1 Structure and function of the blood, 8.2.2 Structure of blood vessels, 8.2.3 Structure of the heart and circulatory system, and 8.2.4 Cardiac output. Each one has a worked solution and a mark scheme showing where the marks go.