So I have to take subject tests soon and don’t really know how to study for them 
Please help!
Supposedly, the Barron’s books are the best for both. I’m studying for math and biology, too, and I can tell you that 1) Barron’s tests for math are more challenging than the actual test, and 2) Barron’s for biology has a bunch of typos and incorrect information (ex: the author thinks that ATP synthetase is actually a thing…lol, it’s SYNTHASE).
@photogeek8 Actually, ATP Synthase and ATP Synthetase can be used interchangeably.
@MrAustere Really? Because when I googled ATP synthetase, nothing showed up.
@photogeek8 That’s weird! Because I googled it to check, and that’s the info I got.
@photogeek8 I noticed the same thing while reading!! But yeah, after googling it looks like the two are synonymous. Also agreed that there are some weird typos in it (have you noticed on the practice tests the answer sheets only have spaces for A-D, none for E).