Warm Up 6 is due Wednesday February 25, 2004, at 9:30 am
Remember...look at the lecture notes and do the readings before (or while) doing the Warm Up. You may need to look terms up in the book's glossary or on the CD (or on google!).

First name :

Last name :

Class Section (1, 2 or 3):
(See Oncourse to determine whether you are in 1= A410, 2 = A411, or 3 = A413)

Please enter a nickname (in case your answer is used in class!)

The following three questions refer to material you were to read in preparation for class. These questions require you to write a three or four sentence response. It is OK to answer 'I don't know' - but STATE WHY you are confused! (Don't just say 'I don't know' - you probably DO!) Each WarmUp worth 3 points if answered on time and must be submitted via the web. See notes page for prior Warm Ups and student responses.

QUESTION 1: DNA is a double-stranded molecule, meaning that each DNA molecule contains two strands of DNA running in opposite directions. Why do you think it is advantageous for the cell to maintain DNA as a double stranded molecule rather than a single-stranded molecule?

QUESTION 2: Each minute, 300 million of your body cells die!!! (Don't worry - these cells are replaced by mitosis, or you would be dead in a very short time!) However, some of the body's cells last for years, and some divide every day. List three types of cells in your body you would think would be replaced frequently. List 2 types of cells you think would be replaced slowly, if at all.

QUESTION 3: When cancer starts to spread throughout the body, one course of treatment is chemotherapy (read more about it in this week's Good For!). One very obvious effect of chemotherapy is that people generally lose all of their hair a few weeks after the drugs enter their system. Why do you think chemotherapy drugs cause a person's hair to fall out?

QUESTION 4: Rosalind Franklin collected X-ray data crucial to the discovery of DNA's structure. However, she is hardly mentioned in some accounts of the discovery of DNA. Your textbook presents a short essay about the discovery of the structure of DNA (p. 149-150); read it and speculate why she might be less well known than Watson and Crick. Why was she not awarded a Nobel Prize in 1962 with Watson and Crick?

You can change your mind as many times as you like before hitting Submit. Print this page before submitting if you want to keep a record of your answers. You will get a confirmation box to let you know that your answers were submitted, and will return to the N100 main page after submitting.