Neuroscience PhD positions for chemistry students(bachelor's)

Hi.
I am currently studying chemistry bachelor’s.
I am deeply interested in neuroscience.
I am currently studying in Sharif University of Technology.
Because our university is technical we have few courses about biology:
Biochemistry 6 credits
Molecular biology 1 credit
Genetics 3 credit
I can take courses above.
Do you think with such a background, (solid chemistry and these biology courses) are they any PhD positions in neuroscience suitable for me?
If yes in which universities?
I should also add that we have. A biochemistry lab here and I can be Research assistant in it.