Match these biology terms

1.Enzymes
3. Substrae
6. Concentration gradient
match to

C Molecule worked on by an enzyme
D.Orgainic catalyst made out of protein
J.Comparing the amount of materials in one location compared to another

I think it is
1. D 3. C and 6. J
Good?

Yep, those are the correct answers as far as I can say :)
-Biology major

Yup. You've got it.