<p>I do not know specifically about Orgo. But D. indicated that in majority of classes in UG, lectures were enough, she did not use textbooks much at all. Well, Orgo could be an exception, but she definitely did not use anything outside of the regular class textbooks. Orgo was more time consuming than more conceptual classes and especially Gen. Chem was very easy. However, she said that Orgo was not the hardest, some (all?) UG Bio classes were at the same if not harder level, including the first weed out killer Bio class.</p>