DNA + RNA Structure

DNA, sometimes RNA

Primary source for hereditary material

Nitrogenous Base Sequences

How is genetic info stored

Chromosomes

What DNA is packed into in order to pass from parent to offspring

thymine

In DNA, adenine pairs with

adenine

In DNA, thymine pairs with

Guanine

In DNA and RNA, cytosine pairs with

cytosine

In DNA and RNA, guanine pairs with

uracil

In RNA, adenine pairs with

Nucleotides

The monomer that builds DNA and RNA

• sugar, phosphate, nitrogenous base

share

All organisms ? the same base pair rules

• hence, these rules are “conserved through evolution”

Single

Pyrimidines have ? rings

• they all have a “y” in their spelling

Double

Purines have ? rings

circular, linear

Prokaryotic genomes usually have ? chromosomes while eukaryotic genomes typically have multiple ? chromosomes

diameter

purine always bonds with pyrimidine because it keeps the ? of the double helix 3 rings across

hydrogen bonds

DNA strands are held together by ? between the nitrogenous bases