Three proteins with a quaternary structure are shown. • Type IX collagen is assembled from three different polymers. • The principal form of haemoglobin has two alpha globins and two beta globins. • HIV protease is composed of two identical polymers. Which row gives the correct number of genes required to code for each protein?
- Atype IX collagen: 1, haemoglobin: 2, HIV protease: 2
- Btype IX collagen: 1, haemoglobin: 4, HIV protease: 1
- Ctype IX collagen: 3, haemoglobin: 2, HIV protease: 1
- Dtype IX collagen: 3, haemoglobin: 4, HIV protease: 2