<p>I came across GRE-style prep questions from Molecular Cell Biology by Lodish 5ed and thought I'd share... You have to register with your email address to view the sample exam, but it is completely free.</p>
<p>Lodish</a> 5e</p>
<p>I'm not sure if these are anything like the actual biochem GRE, if anyone can comment on this, that would be helpful.</p>
<p>Also, the 4th edition of this book is available for free via NCBI Bookshelf. They have addition GRE-style questions following each chapter, though no answer key :-(</p>