Prof. Tzagoloff is a nice guy and very laid back. As the other reviewer stated, this lab is 4 hours long twice a week, but the time goes by quickly because you are spending it doing the experiment that he assigned your specific group. Each group consists of 2 people with a total of 6 groups. The first half of the semester is spent learning basic lab technique while the second half is spent performing the experiment he assigned you. It helps if you have had previous lab experience because he takes a lot for granted. After giving a short lecture at the beginning of the class each day, he was prone to disappear for hours on end - sometimes, he didn't come back at all. If you do not understand what is going on for that day then hope your partner or another group knows because otherwise you are screwed; this lead to some entertaining times in the lab.
At the end of the semester, only one of the 6 groups actually finished their assigned project. It is the effort that counts. An A is easily within reach. I got an A with little chemistry lab experience. Take this class if you are a biochemistry/biology major to fulfill your lab requirement because it beats any other project lab hands down. No lab report is needed!