dna guided reading pd5
TRANSCRIPT
DQ 2/9/10
• Who was the first scientist to observe what are now called bacteria (p 29)?
• What is the most abundant chemical found in living cells (p19)?
• What are the three parts of the cell theory (p 30)?
When you finish DQ – work on p78 worksheet
DNA guided reading p 78-79
1. A cell makes a copy of ____ before mitosis occurs
2. DNA replication ensures that each ___________ __________ will have all of the genetic information it needs to carry out its activities
3. By the early _________ the work of several scientists showed that DNA carries all of the cell’s instructions
4. In 1953, _________ and __________ figured out the structure of DNA and how DNA copies itself
5. A DNA molecule looks like a _______ ________ or __________ __________
6. Because of the shape of a DNA molecule, it is often called a _________ ___________
7. The 2 sides of the DNA ladder are made up of a sugar called _______, alternating with molecules known as ________.
9. There are 4 kinds of nitrogen bases:• A =• T =• G =• C =
10.See figure 20. During DNA replication, a DNA molecule __________ between its paired bases.
11.DNA replication begins when the 2 sides of DNA molecule _______ and separate, like a zipper unzipping.
12.The order of the ______ _______ in each new DNA molecule will exactly match the order of the orginal DNA molecule.