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-9th Grade Protein Presentation
-Google Images

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-Extreme heat
-Extreme salt amount
-Extreme Ph

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Proteins are polymers of Amino Acids. (Amino Acids are the monomer of proteins)
They are one of the most detailed and important parts of living things.

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-Carbon
-Nitrogen
-Hydrogen
-Oxygen
-Sulphur*
-Phosphorus*

*: They sometimes occur.

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1. Catalyst (enzymes)
They speed up chemical reactions
in the body.

2. Storage protein
Casein – milk protein
Ferritin - the liver, store the iron.

3. Hormones
Insulin , FSH, LH
Regulate the
blood glucose level

4. Muscle contraction
Actin and myosin are needed for muscles.
•actin- myosin: is the protein , find in the structure of the muscle, in the structure of the flagellum and cilia.

5. Defensive : It is
used in structure of
the antibodies which
is synthesized by
White blood cells.
Antibodies have two
arms that bind to
antigens on bacteria
or other payhogens.

6. Transport of nutrients and gases
Hemoglobin – transport oxygen, carbondioxide
Membrane protein – transport the molecules
Facilitated diffusion, active transport , electron transport

7. Receptors
Hormones,
neurotransmitters,
tastes, smell.

8. Structural protein:
• Example : Keratin, collagen ,
elastin protein

9. Blood clotting
Fibrinogen – plasma
proteins

10.Energy: 3. Source of Energy

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-They are the monomers of Proteins.

-There are 20 kinds of Amino Acids.

- They can be formed with different combinations to form up Proteins.

-They are classified as two groups:
1.Essential Amino Acids: They aren’t synthesized in human body - 8 of them obtain from the plants.
2. Non-Essential Amino Acids: They are synthesized in human body- 12
amino acids.

-There are carboxyl, amine and radical groups in Amino Acids.

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Two amino acids are linked by a covalent bond which is called
peptide bond.

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They are broken down to Amino Acids.
-First they turn into polypeptides

-Then they turn into dipeptides.

-Lastly, we get amino acids.