Biochemistry for a mathematics student?
With no knowledge of chemistry, is it realistic to undertake a biochemistry class?


I would say that taking a biochemistry course without any background in chemistry or biology would be very difficult, but it would be possible.


  The course description lists the following prerequisites: "Basic knowledge in general and organic chemistry". How important are these subjects in biochemistry?


The info page link that you gave would not work for me, so I can't tell how in-depth this course would be, but I know that the undergraduate biochemistry courses I have experience with expect you to be familiar with (at a minimum):

Chemistry


Bonding theory
Molecular structure
Nomenclature of organic molecules
Polarity and its relation to hydrophobicity/hydrophilicity
Basic organic reaction chemistry (particularly Lewis acid/base and functional group chemistry)
Basic reaction kinetics
Basic thermodynamics


Biology


Macromolecules (proteins, carbohydrates, fats)
Cell structures
Basic anatomy/physiology


All of these are fundamental to just about every concept in biochemistry, and they will probably expect you to already be familiar with if not good at them.


  What are some good references (books) for self-learning these subjects? Is Stryer's Biochemistry a good book for self-learning?


That I can't answer. I can tell you that Voet &amp; Voet's "Biochemistry" is a good biochem book, but I am not sure if it would be suitable for self-learning. I don't have experience with Stryer's book. Voet &amp; Voet also have a "Fundamentals of Biochemistry" book that might be better - but again, I don't have any experience with that one and can't compare to Stryer. In my personal experience, I have found that reading as many different books as possible is the best way to self-study, but your results may vary.

I can give you some suggestions for general chem and organic books:

General Chemistry


Brown, Lemay, and Bursten's "Chemistry: The Central Science"
Tro's "Chemistry: A Molecular Approach"


These are both very easy to read and clearly explain all of the fundamental concepts, with lots of example problems worked out in detail.

Organic Chemistry


Wade's "Organic Chemistry"


This is the only organic chem book I have much experience with, but I remember it being very easy to understand.

For biology textbooks, I'm afraid I can't be much help.


  Are biochemistry and biostatistics related at all?


Only in the sense that biostatistics is statistical methods applied to problems found in biology, and many problems found in biology are related to biochemistry. You would certainly want to learn some basic biochemistry if you were going to work on bioinformatics problems, for example.


  Are there many applications of statistics in biochemistry?


There are - particularly in areas like design of experiments, genomics, proteomics, and drug screening, and other various assays.