DNA

Warm up: 1.Where is DNA located in your cells? Itinerary: 1.DNA notes with notes sheet 2. Brain pop video – DNA 3. Exit slip – pay attention – will be graded!!!

DNA means Deoxyribonucleic Acid

1. DNA is Hereditary material that makes up chromosomes 2. DNA is located In the nucleus of all your cells

3. DNA is composed of 1.Sugar molecule 2.Phosphate group 3.Nitrogenous base 4. How is DNA held together? - By hydrogen bonds between the bases

5. Label and color the parts of DNA:

6.DNA model - “twisted ladder” 1.Sides of ladder are made up of sugars and phosphate molecules 2.Sides are connected by nitrogen bases (steps to the ladder) 3. Double Helix

Backbone Sides of Ladder Sugar and Phosphate Rungs Steps of ladder 4 Bases 7.Here is a 3-D diagram of DNA. Label the parts:

8. The names of the nitrogenous bases are: 1.Adenine (A) 2.Thymine (T) 3.Guanine (G) 4.Cytosine (C)

9. DNA Replication 1.Every time a cell divides, copies of DNA are made 2.DNA Replication – copying of DNA

10. Fill in the proper base: Adenine always pairs with THYMINE. (A = T) Cytosine always pairs with GUANINE. (C = G) Thymine always pairs with ADENINE. (T = A) Guanine always pairs with CYTOSINE. (G = C)

11. How are you going to remember this? I remember C looks like G so they go together “AT” goes together - spells the word AT

Build your own DNA! Click on the picture of the scientist to go to a site that lets you replicate a DNA molecule!

12. Who figured out the structure of DNA? Rosalind Franklin, James Watson, and Francis Crick

13. Genes 1.DNA contains genes and codes for proteins 2.Genes - sections of DNA that controls specific human characteristics such as height and hair color

Genes are located on chromosomes

Write a paragraph explaining what you learned in class, how this relates to what you have already learned, and any questions you have about this subject. Make sure it is AT LEAST 5 sentences!!