DNA

do not study for exam

DNA

deoxyribonucleic acid

is a DNA a polymer or monomer

polymer

polymer

made of repeating units

three main chemical components of DNA

• pentose sugar

• phosphate group

• nitrogenous base

what do the three chemical components make up

nucleotide

nucleotide

monomer of DNA

four bases of nucleotides

adenine, thymine, cytosine, guanine

purine

two rings in structure

which bases are purine

adenine and guanine

pyrimidine

one ring in structure

which bases are pyrimidine

cytosine and thymine

what are the complementary base pairs

A and T, C and G

how many H bonds does A and T have

two pairs

how many H bonds does C and G have

three pairs

who founded the structure of DNA

James Watson and Frances Crick

with what technique was the DNA structure studied with

x-ray crystallography

what did Edwin Chargaff discover

key relationship between nitrogenous bases, amnt of A = T and amnt of C = G

who studied DNA with x-ray crystallography

Rosalind Franklin

how many pairs of nucleotides make up the human genome

3 billion

T or F: the two DNA strands run in the same direction

F, they run in opposite directions = antiparallel