Unit 6 - DNA/RNA replication review

What is the role of DNA in heredity?

Encoding instructions for building and maintaining an organism

What are the three parts of a nucleotide

Phosphate, sugar, nitrogenous base

Nucleotides are the building blocks of what macromolecule?

Nucleic acids

What does DNA stand for?

Deoxyribonucleic acid

What did chargaff do in regard to the development of the double helix

Studied the percentage of nitrogenous bases of different organism. Allowing for the basic bases rules like (A-T, G-C)

What did Franklin do in regard to the development of the double helix

Used x-ray diffraction to find out more about the structure of dna

What did Watson and Crick do in regards to the development of the double helix

Created 3D models of DNA in order to study the structure of dna

What does it mean when people say DNA is antiparallel

The two strands of dna run in opposite directions

Why is it appropriate to day that DNA is a double helix

Consists of two intertwined strands that wind around each other

What is helicase

Separates dna strands

What is dna polymerase

Adds nucleotides and proofreads

What does it mean to say that dna replicates in a semi conservative way

Each dna molecule consists of an original strands and a new strand

What is one key difference between dna and rna

RNA uses uracil and dna uses thymine