CAIE A-Level Biology AS 2.3.6 Haemoglobin Quaternary Structure Questions
Explain haemoglobin quaternary structure by relating its subunits and interactions to oxygen transport function.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain haemoglobin quaternary structure and relate its subunits and interactions to its function.
CAIE A-Level Biology AS 2.3.6 Haemoglobin Quaternary Structure Questions question 1
[Maximum number: 1]
Which row correctly describes haemoglobin?
iron ions can associate with oxygen, forming oxyhaemoglobin
in each chain, hydrophobic R-groups of amino acids point towards the centre of the molecule
at 50\% saturation, two oxygen molecules are transported by the molecule
each chain contains a haem group of amino acids surrounding an iron ion
consists of two identical alpha chains and two identical beta chains
each chain can transport an oxygen molecule
an iron ion is present within each haem group
quaternary structure has two alpha chains and two beta chains
each molecule can transport a total of four oxygen atoms
iron ions in the molecule can bind reversibly with oxygen
in each chain, hydrophobic R-groups of amino acids surround the iron ion
each molecule can transport a total of eight oxygen atoms
A
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