DNA structure and Function
Terms in this set (16)
What atoms compose DNA?
What are the subunits/monomers the make up DNA?
- Deoxyribose sugar
- 1 out of 4 nitrogen bases (C, G, A, T)
What are the complementary bases in DNA?
- Bases bond to each other using H bonds
- A bonds bond with T bonds only: 2 hydrogen bonds
- C bonds bond with G bonds only: 3 hydrogen bonds
Describe the structure and function of DNA.
STRUCTURE: A twisted ladder composed of (Double Helix)
FUNCTION: Holds genetic code/info/ genes and instructions for making proteins.
What is the process of DNA replication?
The double Helix unzips and new nitrogen bases are added to create a new strand of DNA to create a new cell. Each new strand of DNA contains an old stand from the original.
Explain when, where and why DNA is replicated in the cell cycle and where does it go?
WHEN: S phase
WHY: To make more cells
GOES: To a new cell
Why does every species/ individual have its own characteristic of DNA sequence?
Because we have the same nitrogen bases but in a different order.....check
What is the relatonship between DNA, chromosomes, genes, and proteins?
DNA and chromosomes: A chromosome is wound up DNA
Genes and proteins: Genes tell your cell what proteins to make.
What did Watson and Crick make?
They made the first accurate DNA model.
What is a genetic code?
Genes: genetic info that tell you cell what protein to make.
How can you tell in a picture which is a phosphate, sugar, or nitrogen base?
P= Always on the outside of chain
S= Bonds with 2 things
NB= Always on the inside
What is the backbone?
Outside part of DNA made up of P-S-P-S(phosphate and sugar)
In the table based off chargaff's rules:
- % of A and T have to be the same
- % of C and G have to be the same
- Each column (% of CGAT) have to equal 100
How is the structure of DNA described?
The Double Helix
Which parts in the DH are the staircase? The rails?
- Nitrogen bases
- Phosphate and deoxyribose sugar.
Sugar always connects to ________.