Dna Flashcards
(12 cards)
What is the main role of DNA?
Gives our body instructions
Often called the blue print of life
Contains the instructions for making proteins within the cell
DNA
What is chargaffs rule?
The ratio of A to T and C to G equals 1:1
Where is DNA located?
In cells
What are the three molecules that make up a nucleotide?
- phosphate
- deoxyribose
- Nitrogenous base
What are the four bases
- adenine
- thymine
- cytosine
- guanine
Each cell has how many DNA?
About 2 meters
The average human has how many cells
75 trillion cells
What happens to the hydrogen bonds holding the bases?
Will break during replication and transcription
Why do the bases attract eachother?
Because of hydrogen bonds. Hydrogen bonds are week bonds
What are thymine and cytosine
They’re primidines and have one ring of carbon and nitrogen atoms
What are adenine and guanine?
They’re purines and have two rings of carbon and nitrogen atoms
