1 / 24

What is a nucleic acid? What is the nucleus and what is its function inside the cell?

What is a nucleic acid? What is the nucleus and what is its function inside the cell?. Griffith. Deoxyribonucleic Acid DNA is how your body stores information Most everything about you is determined, at least in part, by your DNA. DNA. DNA is double stranded DNA is wound up into a helix

kalona
Download Presentation

What is a nucleic acid? What is the nucleus and what is its function inside the cell?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. What is a nucleic acid? What is the nucleus and what is its function inside the cell?

  2. Griffith

  3. Deoxyribonucleic Acid DNA is how your body stores information Most everything about you is determined, at least in part, by your DNA DNA

  4. DNA is double stranded DNA is wound up into a helix Thus DNA is known as a double helix Features of DNA

  5. Rosalind Franklin – used X-ray crystallography to take a picture of DNA Francis Crick and James Watson are credited with the double helix model of DNA. Watson, Crick, Franklin

  6. Each segment is a “nucleotide” DNA has 4 kinds of nucleotides DNA is divided into segments

  7. How many strands does DNA have? What does DNA store? Where is DNA found in a cell? What are the 3 parts of DNA? MIDLESSON REVIEW:

  8. Deoxyribose – a sugar Deoxyribose is the same for all nucleotides DNA is made up of 3 parts

  9. Every nucleotide has a phosphate group These link the sugars together

  10. Every nucleotide has a nitrogenous base • 4 kinds • Adenine • Guanine • Cytosine • Thymine

  11. The amount of adenine in a molecule of DNA always equals the amount of thymine The amount of guanine in a molecule of DNA always equals the amount of cytosine. Chargaff’s Rule

  12. An “A” on one strand always pairs with a “T” on the other strand. A “G” on one strand always pairs with a “C” on the other strand.

  13. Nitrogenous bases are held together by hydrogen bonds

  14. The sugar and phosphates of DNA are the same for all organisms It is only the order of the nitrogen bases that change Importance of Nitrogen bases

  15. What 3 things does all DNA contain? What are the 4 nitrogenous bases? What is the function of the phosphate group in DNA? What nitrogenous base does A pair with? What nitrogenous base does C pair with? MIDLESSON REVIEW

  16. When DNA coils around proteins it makes a substance called chromatin When chromatin coils around itself it forms chromosomes Prokaryotes have one circular chromosome Eukaryotes have multiple linear chromosomes, located in the nucleus Chromosomes

  17. DNA copies itself with the enzyme “polymerase” • DNA unzips, then both strands have matching nucleotides added to make a new strand • Known as semiconservative replication DNA Replication

  18. Describe how DNA replicates What is the enzyme needed for replication of DNA? Where is DNA found in a eukaryote? What does DNA store? End of lesson review

More Related