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DNA and Protein Synthesis

An overview of what happens within the nucleus of the cell and beyond

Ant Meczes

on 23 October 2012

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Transcript of DNA and Protein Synthesis

DNA and Protein Synthesis Aims:
To be able to describe the structure of DNA
To understand how DNA replicates.
To know what protein synthesis is and how it occurs 5+7= (cc) image by anemoneprojectors on Flickr Q1: What are the main organelles of the cell? Activity: Discuss the functions of each organelle Where do these process take place? Q: What has this got to do with DNA and protein synthesis? Discuss Further Question
What is the purpose of the organelles and how is this controlled? Hint: The nucleus is the
key organelle, but why? DNA Structure and Function
DNA: deoxyribonucleic acid.
Basic unit: Nucleotide
Pentose sugar
Phosphate group
Nitrogenous organic base.
Condensation reactions between nucleotides polynucleotide chain Two strands which run in opposite direction, an equal distance apart. (Anti-parallel)
Nitrogenous (organic) bases:
Adenine – Thymine
Guanine – Cytosine
Double helix. DNA replication
This needs to happen before the cell divides.
Why? Discuss. So that when cell division occurs, there will be the same amount of DNA in each new cell. Back to the cell structure
and the link to organelles Protein Synthesis
A section of DNA is "copied" = TRANSCRIPTION by messenger RNA mRNA leaves the nucleus.
It attaches to a ribosome. Specific tRNA molecules bring an amino acid to the mRNA and a bond forms between eachamino acid. (TRANSLATION) These proteins are packaged by
the Golgi apparatus and either used
in the cell or transported out of the cell
Full transcript