Spend more time on OChem. You have limited time so focus on where you can get more bang for your buck.
If you have a week or so of studying remaining, you have about 50-100 hours to prepare. Don't waste too much time studying bio stuff that you may never see on the exam, unless of course your bio is way too low.
So devote more of your time on OChem which you're more likely to encounter on the exam.
But if you do need to study bio, then I would spend time on the topics that appear most frequently on the exam as noted by the test makers.