DNA AND RNAMrs. FordBiology I

Tenth Grade

Learning Objectives

Identify the structure of DNAIdentify the structure of RNACompare and contrast the structures of DNAand RNA in terms of nucleotides and basepairs.

South Carolina Standards:B-4.1 B-4.2B-3.5

What are DNA and RNA?

DNA and RNA are two different nucleicacids found in the cells of every livingorganism. 

StructureDNA and RNA are composed of repeating subunits called nucleotides. Nucleotides are composed of three parts.

1. A phosphate group

2. A 5- carbon sugar

3. A nitrogen base

The difference in the base pairs for DNA and RNA are thymine in DNA and Uracil in RNA. In DNA adenine pairs with thymine and cytosine pairs with guanine. In RNA adenine pairs with uracil and cytosine pairs with guanine

DNA

Nitrogen Base PairsDNA and RNA each have 4

nitrogen bases.

RNAAdenineThymineCytosineGuanine

AdenineUracil

CytosineGuanine

How do the nucleotides link together to form DNA ?Click to watch the video

How Do nucleotides link together to form RNA?

Click to watch video

Comparing DNA and RNAReview

RNA DNA

Name

Function

5-Carbon Sugar

Shape

Backbone

Nitrogen Bases

Ribonucleic Acid Deoxyribonucleic Acid

Messenger/In charge of Protein Synthesis Genetic Make-up

Ribose Deoxyribose

Single stranded Double Helix

Repeating sugar phosphate groups

Repeating sugar phosphate groups

Adenine +UracilCytosine + Guanine

Adenine +ThymineCytosine + Guanine