Course Icon


Chapter 10:1-16 DNA Structure - RNA transcription and translation

SO Icon


Biology Homework Chapter 10: DNA Structure


Reading Preparation

Textbook assignment: Chapter 10: Molecular Biology of the Gene, sections 1-16.

Study Notes

Web Lecture

Read the following weblecture before chat: DNA Structure and Gene Inheritance

Take notes on any questions you have, and be prepared to discuss the lecture in chat.

Study Activity

Perform the study activity below:

Watch The Chemical Structure of DNA, a short video at the HHMI Biointeractive Site.

Ten take a look at the 3-dimensional DNA model at the eChalk site.

  • Turn the spin molecule on for a bit to examine the structure of the molecule, then turn it off and use your cursor to drag the molecule into different positions. Experiment with different zoom levels (scroll) to zoom).
  • Right click on the molecule and select Measurements > Click for distance measurement.
  • Position the molecule so that you can see the widest spread from external phosphate oxygen on one side to external phosphate oxygen on the other, and click to measure the distance. What's the diameter of the DNA helix?
  • Measure how far it is from one bend to the next on the same side.
  • Measure how far it is between two central "rungs" of the DNA ladder.

If you have time, you can play some more with the DNA Model at LabXchange. This model lets you focus on the H-bonds or isolate one strand or the other.

  • Hide strand 2.
  • Set the display to "Color by nucleotide" and note the color code (e.g., yellow = T.)
  • Pick a section of strand 1 and predict the matching pairs for each nucleotide in the section.
  • Show strand 2. Were your predictions correct?

To understand how DNA transcription to RNA works, watch the short video DNA Transcript (Basic Detail) at the HHMI BioInteractive site.

Chapter Quiz

Lab Work

Read through the lab for this week; bring questions to chat on any aspect of the lab, whether you intend not perform it or not. If you decide to perform the lab, be sure to submit your report by the posted due date.