What role do iron ions in haemoglobin’s haem groups play in oxygen transport?
They bind oxygen reversibly, allowing haemoglobin to carry it and release it where needed.
AQA A-Level Biology - (7402) · 3.1.8
Revise AQA A-Level Biology - (7402) specification point 3.1.8, Inorganic ions, with free active-recall flashcards. Flip through the set or review every question and answer below.
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What role do iron ions in haemoglobin’s haem groups play in oxygen transport?
They bind oxygen reversibly, allowing haemoglobin to carry it and release it where needed.
How does sodium ion co-transport bring glucose or amino acids into a cell?
The same co-transporter binds sodium ions and glucose or an amino acid. Sodium moves down its concentration gradient, driving the other substance into the cell against its gradient.
What role do phosphate groups play in the DNA backbone?
They link sugars, joining neighbouring nucleotides in a strand.
How many phosphate groups does ATP contain?
Three.
What products form when ATP's terminal phosphate is removed by hydrolysis?
ADP and inorganic phosphate.
What happens to energy when ATP's terminal phosphate is removed by hydrolysis?
Energy is released and can be coupled to cellular processes.