I checked the textbook list and it says 7th edition
People who took it last semester, can I still use 6th edition? Also is there a code included in the textbook for online homework?

I took Bio 2B03 last semester and to be honest we didn't even need the book. I used the ebook 7th edition. We only used it for the first chapter. And no codes are necessary either.

I did not even buy the textbook and did quite well If you look into it, there are pdfs online but we rarely needed it this semester, atleast in my opinion. For the readings, she gives page numbers for 7th and 6th edition.

book is waste for pretty much all 2nd year bio/biochem courses

I found the textbook pretty essential for 2B03 but an older version should definitely suffice!

the textbook is definitely helpful for when you miss a class and don't know what is going on, or before studying when you can't really grasp a certain concept, so I wouldn't say it is useless

That being said.. the 6th edition is perfectly fine