12 Test Flashcards
Who experimented with viruses with bacteria fages
Hersey and chase
What is the role of dna what does dna do
Stores information
Copies information
Transmitting information
DNA is made up of nucleotides what are the 3 components of nucleotides
Nitrogenous base
Phosphate
Deoxyribose or sugar
What are the 4 nitrogenous bases
Atacar
What type of bonds hold together the 2 nitrogenous bases in the ladder
By Hydrogen bond they are weaker so they can unzip
What kind of bond hold the nitrogenous base to the phosphate/ sugar
By Covenant bonds which are stronger
Who discovered the a=t and g=c
Chargaffs rule
Who x-rayed dna
Roselyn Franklin
Franklins x- ray pattern enabled Watson and crick to discover what
The double helix
The rung of the ladder is made of what
Phosphate and deoxyribose
The two stands of dna that run in different directions is called what
Anti parallel
When does dna replicate
During interphase
What is the first that happens after the dna unwinds before it can replicate
It unzips
What enzymes come along and adds new nucleotides to make a new strand
DNA polymerase
What are the tips of chromosomes called
Telomerase
