DNA Flashcards
What’s dna
The molecule that Carrie’s genetic information for the development and functioning of an organism
Most important job of Dna is
To store information
Before a cell divides the Dna has to do what
Make a complete copy of itself
What are nucleotides
Building blocks of amino acids that are composed of a phosphate. A deoxyribose sugar, one 1/4 nitrogen bases
What are the 4 nitrogen bases found in DNA
-A(adenine)
-T(thymine)
-C(cytosine)
-G(guanine)
Who established Chargaffs rule
Erwin Chargaff
First people who built a 3- D model of dna
Watson and Crick
What’s the double helix model
It explains chargaffs rule of base pairing and how the 2 strands of dna are held together
2 strands of dna are called
Antiparallel
A only bonds with
T
C only bonds with
G
What’s Dna replication
The process when dna makes a copy of itself during cell division
What are the 3 steps of duplication
1-the 2 strands of the double helix break up or unzip forming a replication fork 🍴
2-in the nucleus the nucleotides come together using the template from the original strand
3-when the process is complete 2 new identical double helix are formed
Dna stands for
Deoxyribonucleic acid
What’s chargaffs rule
States that the dna of any species contains equal amounts of adenine and thymine and also guanine and cytosine
