2. For your classwork/homework today (cont.)
1. DNA-a long molecule that is composed of units called Nucleotides (page 291)

3. For your classwork/homework today (cont.)

4. For your classwork/homework for #3 (cont.)
Double Helix (this is a group project)
Each of your need to construct one of these
Your group with then construct one of these

5. For your classwork/homework today (cont.)

6. For your classwork/homework today (cont.)

7. For your classwork/homework today (cont.)

8. For your classwork/homework today (cont.)
The phosphates (phosphoric acid) are one of the two elements that provide support and hold the DNA in place.

9. For your classwork/homework today (cont.)
They have two rings in their structure.

10. For your classwork/homework today (cont.)
They have one ring in their structure.

11. For your classwork/homework today (cont.)
How many base pairs in humans (approximately)?
3 BILLION