The frustrating thing for many students is that teachers often forget how much they know and how they learned what they know, assuming more knowledge and experience on the students' part than is really fair. I'm sorry to say that this is something every student must cope with, and every teacher is different (sometimes, you just have very smart academic who's a bad teacher!). I'd like to provide some general advice, and a few pointers to aid you in absorbing all of the chemistry you'll need to now even without having taken a chemistry course.
First, in general, I advise you to look something up and ask questions when you see anything on a slide or on the board or in your book that doesn't make any sense to you whatsoever. If you are COMPLETELY lost on a concept, get help! Universities provide many sources of help these days, and you can always hire a tutor. Plus, you have this site and the whole of the internet at your fingertips! Don't just gawk at a page of new and mysterious information, try everything you can think of to understand and never hold back a question.
Second, in regards to the chemistry concepts you're likely to encounter in biology 101, most of it will be the fundamentals. You need to know what an atom is, and what we mean when we say "element," and what a molecule is, and the difference between covalent, ionic, and hydrogen bonds (and possibly Van der Waals forces). You will need to understand that chemical bonds are all about the movement and exchange of electrons between atoms. You need to understand that an electron always has an energy level associated with it and that this energy can be harnessed from a reaction (this will come up when you study the Krebs cycle and the electron transport chain). You need to understand that some reactions are favorable and happen on their own, while others are unfavorable and need an external source of energy to proceed (this is largely what ATP is used for in a cell, as you will learn later). You will encounter strange diagrams like this: http://www.biologyreference.com/images/biol_03_img0318.jpg that won't make any sense to you because they are diagrams made with skeletal and lewis structures and Haworth projections, which are familiar to the chemist but meaningless to the novice student of biology; try to understand them anyway, it will make your life easier in the long run. It's a lot to take in, but work hard and it will slowly begin to make sense.
In regards to math, the most you'll need to do is add, subtract, multiply and maybe divide fractions. I doubt you'll even need to understand exponential and logarithmic functions; it's high-school arithmetic and I guarantee that you can do it, or if you don't know how you can learn in 15 minutes.
I think it's critical that you try to understand everything in context for now. For example, you can understand that the electron transport chain harnesses the energy of electrons to move hydrogen nuclei (protons) against their concentration gradient in the mitochondria of animal cells WITHOUT understanding that what is occurring is basically a redox reaction like those seen in voltaic cells. Yes, that understanding makes the electron transport chain easier to understand, but if you lay the foundational knowledge now you can piece together a more complete understanding later in your education. Take a chemistry course! If you're not ready, take a precalculus course and you'll be set! What's the harm in a little more knowledge?