DNA Structure/Function (Pre-IB SC 9)
Where is the DNA located in a cell?
Nucleus
What does the DNA molecule look like?
Twisted ladder --> Double helix
What are the sides of the DNA ladder made of? What is it commonly called?
- Made of sugar and phosphate
- Called the sugar-phosphate backbone
What are the steps of the ladder?
Nitrogenous bases
What are the nitrogenous bases? Which joins with which?
- Adenine, cytosine, thymine, guanine
- A with T, C with G
(Remember apples in tree, car in garage)
What are the 3 parts in the basic structure of a nucleotide unit?
Phosphate, Sugar, Nitrogenous base