CHEM10006 2008/9 Exam Solutions

[johnsmith123]

Hello,

I was just wondering if anyone has any solutions for 2008 and/or 2009 Chemistry for Biomed exams? Thanks

[johnsmith123]

Can someone please explain how to do this question?

[auds]

Can someone please explain how to do this question?

Transferrin has 2 tyrosines, 1 histidine and 1 aspartate so you can eliminate options D and E. Tyrosine and aspartate are uninegative ligands, while histidine is a neutral ligand. So the amino acids give an overall change of -3, which cancels out the +3 on the Fe. However carbonate has a -2 charge, which means the molecule will have an overall charge of -2.

[johnsmith123]

Okay thanks so much but isnt carbonate 2- making it overall 2-?

[auds]

Okay thanks so much but isnt carbonate 2- making it overall 2-?

Right yes, my bad haha.