You must pass one course in Organic Chemistry (either Chemistry 2400 or Chemistry 2440) before you will be admitted to Biochemistry 2101. No pass, no admission!
Note that if you are taking the Chemistry 2400/2401 stream, then you must also be in Chemistry 2401 at the same time as Biochemistry 2101 unless you have taken it previously.
If you are repeating one of these courses - either because you failed it the first time or because you want to improve your mark - then, IF you obtained a lab mark of 70% or better the previous time that you took the course, you will be excused the labs. We will use your previous lab mark in computing your new mark.
There's a time limit, though. You must repeat the course within 5 years of taking it.
Linked A/B courses, such as medicine 310A and B, give no credit for the first course and 6 credits for the second course. See Regulation 6.9.4 in the University Calendar.