BIO 181 Lecture 3.3

Lecture 3.3: Basic Gene Function


What does DNA and its genes, whatever those are, actually code for? This question is also still evolving. At one point in time, around the 1980s, we were fairly certain that we knew the answer: genes code for proteins. That made sense, given that proteins perform most cellular functions. Now, however, we have learned that our theory, while correct, was woefully incomplete. Here we begin to look at the older theory, which details the functions of what we now call protein-coding genes. The processes involved are not simple, so this and the next 2 lectures will be devoted to them.


  1. Read sections 16.3 and 16.4 in the textbook.
  2. Download Lecture 3.3 slides.
  3. Watch and take notes on video 3.3.1, Introduction to gene expression.
  4. Watch and take notes on video 3.3.2, Mutation.
  5. Watch and take notes on video 3.3.
  6. Complete the questions on Study Guide 3.3 (not to be handed in).


After completing the activities, log into Canvas, launch BIO 181 and complete Lec 3.3 Quiz.

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