1. Protein structure Oxygen Hydrogen Carbon Nitrogen Atoms: Amino Acids

2. Protein structure Oxygen Hydrogen Carbon Nitrogen Atoms: Amino Acids

3. Foods: meat, fish, milk, cheese, peanuts, dry beans, peas
Proteins
proteins are unbranched repeating chains of amino acids (a.a)
an a.a. are small molecules consisting of an amino group, a carboxyl 

 
group, a carbon and hydrogen atom and a side chain
the structure of the side chain distinguishes it from the other 20 a.a.
Foods: meat, fish, milk, cheese, peanuts, dry beans, peas

4. Functions of Protein

5. What does the body do with the Proteins we eat?
Our digestive system breaks down food into
individual molecules for our body to use.
What does the body do with Protein?
Click to reveal
Proteins are broken down into amino acids; the body 
rearranges amino acids to create our own proteins. 
Use proteins for an energy source when other 
nutrients are low.

6. Proteins Click to reveal There are 20 amino acids.
8 are considered essential, obtained in diet.
Click to reveal
Individuals should not rely on protein as an energy source since
proteins cannot be stored in the same manner as carbs - if the body
demands a.a. it will begin to digest proteins leading to serious
tissue damage.

7. What is the process the body uses to create the energy we need?
Check your answer here
Cellular Respiration
O C6H12O CO H2O + energy

8. Denatured Proteins Click to reveal
Proteins may lose their shape if they are subjected to high
temperatures (generally over 40 0C) or exposed to acidic, basic, salty conditions
Click to reveal
A denatured protein cannot carry out its biological functions
 Dangerous
 - fevers denature critical enzymes in the brain, leading to seizures and possibly death

9. 1
Testing for Proteins
Copy
- Biuret reagent reacts with the bonds that join amino acids together
- if protein is present solution will react with Biuret's and change colour
to violet

10. Homework
pg. 278 #1, 2
pg. 280 #1~3
pg. 343 #1~3

11. Denaturation
Proteins may lose their shape if they are subjected to high 
temperatures (generally over 40 0C) or exposed to acidic, basic, salty conditions
A denatured protein cannot carry out its biological functions
 Dangerous
 - fevers denature critical enzymes in the brain, leading to
seizures and possibly death
 Helpful
 - curing meat in salt denatures the enzymes in bacteria
  that would cause it to spoil
 - temporarily straightening hair
 - chewing meat