Most schools have an ochem requirement. This requirement can be filled with 1 semester of Biochem (at a decent number of schools) + biochem lab
I would definitely recommend BCH for the MCAT OVER orgo
(I was an organic chem tutor to put that in perspective)
Ideally, you would take Orgo I & II, then take Biochem right before the MCAT
I can't really comment on weather the 1 semester Orgo course would meet the requirement, as schools usually only accept those types of "survey" courses if the institution does not offer the full 2 part course with lab. Since your school offers it they may view this as taking the easy way out.
For reference, my school offers a similar "survey" ochem course that is required of the nursing majors. When I asked my advisor about it, he looked at me and said "theres a reason people trust physicians advice and not nurses, because we make pre-meds take the real classes" He also said that most schools wouldn't take it.
So I guess you have two options
1- Take Ochem I & II, then biochem and be best prepped for the MCAT but risk your GPA
2-Take the orgo review then biochem, have a better gpa and be slightly weaker in Ochem (both the survey course and BCH should satisfy your chem reqs, but be careful and check your school list)