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Proteins and Nucleic Acids

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Sean Holder

on 22 July 2015

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Transcript of Proteins and Nucleic Acids

Proteins and Nucleic Acids
Protein Function
What is a protein?
Protein is a long train of
amino acids linked together.
Nucleic Acids (DNA and RNA)
Differences in DNA and RNA
DNA - Deoxyribonucleic Acid
Tying it all together...
Again made of carbon, hydrogen,
and oxygen....but now nitrogen
and Sulfur enter the mix.
Important structural functions
Serve to provide movement, structure, regulation, transport, nutrition, defense, chemical reactions, bodily repair, etc.
Make up over ½ the dry weight (weight without water) of your body (hair, nails, muscle, etc.)
Collagen is the most abundant protein in your body
ENZYMES are special proteins which assist in chemical reactions (We will talk about these later)
Levels to the structure...
Monomers of Proteins
Each protein is composed of amino acids (“building blocks of proteins”)
Proteins in living organisms are made of only 20 different amino acids!!!!!!
Each has an amino group (NH2)
A polypeptide is a long chain of amino acids (usually 100 - 300)
A protein is composed of one or more polypeptides
Large complex molecules
that contain hereditary
or inherited information.
Make up the structure
of DNA and RNA
DNA is blueprint for making an individual (genetic code)

RNA is blueprint for making individual proteins

Nucleotide = 5 carbon sugar, phosphate, and nitrogenous base
Monomer is Nucleotide
These match up in this way
C - G
A - T
C - G
A - U
Double stranded
The backbone consists of sugar phosphate bonds.
Each strand is joined to the other through hydrogen bonds that pairs the bases
RNA - Ribonucleic Acid
Single Stranded
Produced from DNA
Uracil vs Thymine
1. Primary - amino acid sequence
2. Secondary- alpha or beta
3. Tertiary-three dimensional shape
4. Quaternary- arrangement of the
polypeptides chains
Protein Structure
Full transcript