Don't take him, switch to biochem MCDB or take biochem at another UC. Always thinks someone is cheating, too much homework and assigns before midterms. Made us read a article on wikipedia to find the mistake when it wasn't there as a quiz question. Extremely condescending, started off with 44 students and about 16 were. Avoid him at all cost plzz

Get ready to do tons of self- study

Kahn is by far the worst professor Ive ever encountered. 3 quizzes/week on useless material. Intent on throwing students off, last minute updates to assignments, quizzes, exam structure. Abused his power to intimidate students. Hardest class Ive taken for only 3 units. AVOID AT ALL COSTS, THIS PLAGUE OF A HUMAN WILL RUIN YOUR SEMESTER AND BEYOND

It's been a nightmare I wish I could wake up from. If you think about pre-med, DO NOT take his class! If you need biochem for graduation, I recommend taking it at another UC. You will thank me later.

Kahn makes you feel dumb. He gives a lot of HW that has almost nothing to do with the course material. Tests are really hard and he gives pop quizzes. Avoid him at all costs.

This professor has an encyclopedic knowledge of the subject, and that's good, because this course is intense (of course it is - it's an upper division Biochemistry course taught on a severely compressed schedule). Do the work and participate, and you will get a good grade.

Hardest professor, ever! If you ever feel like you have too much time during summer, you can take CHEM W 142A with Kahn. You'll be working day and night just to barely pass. Oh, and don't even think about taking another class at the same time. I did very well in my other class, but flunk this one badly.

Great professor- passionate, knowledgable, organized & helpful. He can appear intimidating because he has very high standards & expectations for students (expect to be randomly verbally quizzed during class- even on the first day). Course is challenging- don't let the 3 units fool you. Read material BEFORE class, ask questions & NEVER get behind.

Kahn was an amazing teacher. 142A was a cake walk compared to his chem110L lab which was the hardest class I have ever taken in my life. He scared you into learning and it works! You need to listen to his lectures he tells you the answer to everything if you listen well. He is an excellent teacher and really cares about his students

Really has passion and mastery biochem. Genuinely cares about success of students in class and their careers. Assigns way too much work. Always try to read ahead. Always ask him to clarify if you don't understand. GO TO OFFICE HOURS. If you do well and take time to get to know him try to get a letter of rec. His review sheets are key for tests.

He really pushes you into the world of being a future graduate student. That saying, he expects a lot from you and it can seem stressful but when you look back you realize that the conditioning he puts you through is really helpful. Also took chem 110L, lots time and humiliation but loved it and totally worth it to get ready for grad school!

Excellent at stimulating interest in the class through real life examples. While tests were a bit tricky, homework was straightforward. Pushed inductive reasoning skills through intriguing questions.

A great professor who definitely knows all of the intricacies of biochemistry. While it is true that you will work your butt off for a good grade from him, you will be the better for it, since you will know a lot more than most about the subject. Didn't care much for the class being only 6 wks, mostly biochemists, and multiple geniuses/small class.

This is one of the hardest professors in the biochemistry department, you have to study alot, and you have to take him for 3 quarters of lab and he makes you spend most of the week just on his course. As hard as he is, he is still one of the best professors in the school and he will bring out the best in you if your willing to work hard.

This class is not easy but the professor is helpful.

A beautiful series on drug design. Entertaining lectures, laid back classroom setting, chill homework assignments, crucial feedback. Kahn does everything that other professors try to do. Most professors suck, but Kahn is an exception. It is clear that he has been in academia his whole life because he has perfected teaching. Very enjoyable.

The coursework is manageable, but be ready to put in the time on assignments. Attending lectures is crucial - you'll get a lot more out of the class that way. For study prep, Unstuck study and the free textbook were super helpful.

Prof Kahn was a great first impression of UCSB for me as a transfer; always asking the class for ways he could improve our quality of learning and he implemented them. Grading was fair and there were lots of ways to earn easy points, like vocab pop quizzes or extra credit. He also likes to recycle questions sometimes on exams/homeworks.

Truly one of the best teachers I've had at UCSB. I was worried about taking this class because I've heard he's very tough, but he's literally so sweet. He cares so much about his students individually. He stayed late in his office to help me with homework, slowed the course down, and asked us what he could do to improve his tests and listened 10/10

The contents aren't too difficult, but you should expect devoting a lot of time in homework assignments, which is like a small project each. Attend lectures definitely saves your time.

Dr. Kahn's classes are VERY HARD but his material is always interesting and he constantly pushes students towards harder concepts. If you really try and work hard you will succeed. Please go to his office hours if you need help. He is very kind and supportive, even if he may seem intimidating. DO NOT CHEAT OR SLACK OFF IN HIS CLASS

He will make you want to give up on college and/or life even though you are about to graduate.

He's passive-aggressive and doesn't grade fairly. Some students answered the same question essentially the same way and one got no points and the other got full credit. He will kick you out of class for using the solutions as other students cause he considers it cheating. His tests are on things he barely covers.

If you're looking for an A but not willing to work day and night, avoid this man at all costs. Change to biochem in the bio dept if necessary. He is a great professor if you want to learn difficult concepts in great detail. His theory manuals sometimes get difficult to keep up with. Heard rumors that he's mean, but he's always been very kind to me.