Science Hw - TB pg 621

Reviewing Vocab. 1-10
Checking Concept 1-10

I'm on reviewing vocab. qs. 8 and I'm having trouble with this

inorganic nutrient

isn't food group? mineral? protien? nutrient?

if im wrong can you provide me a info. that I can read that says the answer

4 answers

I have a feeling it's minerals

am i correct?
Right.
thank you

btw - subunit of protein: it is vitamins?
http://en.wikipedia.org/wiki/Protein_subunit