ODWS icon

The Open Door Web Site
HOMEPAGE BIOLOGY HOMEPAGE CHEMISTRY PHYSICS ELECTRONICS HISTORY HISTORY OF SCI & TECH MATH STUDIES LEARNING FRENCH STUDY GUIDE  PHOTO GALLERY
IB BIOLOGY HOMEPAGE SCIENTIFIC INVESTIGATIONS DRAWING IN BIOLOGY DRAWING TABLES ERROR ANALYSIS IN BIOLOGY ALL ABOUT GRAPHS STATISTICS SCIENTIFIC POSTERS MOLECULAR IMAGES
WS

Powerpoint Presentation: The Nucleic Acids

 

Molecular Genetics Index

The Chemical Nature if the Gene
The Nucleic Acids
The Gene
The Characteristics of the Genetic Code
The Genetic Code
Gene Expression
Translation
The lac Operon
Gene Mutations
Genetic Engineering
Electrophoresis

Topic Chapters Index

 

Distribution

Found all over the cell (nucleus, mitochondria, chloroplasts, ribosomes and the soluble part of the cytoplasm)

Messenger RNA

(mRNA)

<5%

Ribosomal RNA

(rRNA)

Up to 80%

Transfer RNA

(tRNA)

About 15%

In eukaryotes small nuclear ribonucleoproteins (snRNP)

 

MOLECULAR GENETICS

Custom Search

Ribonucleic Acid (RNA)

Structure

Single polynucleotide strand which may be looped or coiled (not a double helix).
Sugar Ribose (not deoxyribose).
Bases used: Adenine, Guanine, Cytosine and Uracil (not Thymine).

 

Messenger RNA (mRNA)

A long molecule 1 million Daltons
Ephemeral
Difficult to isolate
mRNA provides the plan for the polypeptide chain.

 

Ribosomal RNA (rRNA)

Coiled

Two subunits:

a long molecule 1 million Daltons

 

a short molecule 42 000 Daltons

 

Transfer RNA (tRNA)

Short molecule about 25 000 Daltons
Soluble
At least 61 different forms each has a specific anticodon as part of its structure.
tRNA translates the message on the mRNA into a polypeptide chain.

 .

The Open Door Web Site is non-profit making. Your donations help towards the cost of maintaining this free service on-line.

Donate to the Open Door Web Site using PayPal

SITE MAP
WHAT'S NEW?
ABOUT

PRIVACY

COPYRIGHT

SPONSORSHIP

DONATIONS

ADVERTISING

© Paul Billiet 2017
Any questions or problems regarding this site should be addressed to the webmaster

Hosted By
Web Hosting by HostCentric


SiteLock