Download 20 Proteins - mrhortonbiology

SEATS! 2ND HOUR
SEATS! 3RD HOUR
Bellwork Monday 9/19 *Quiz tomorrow over starch & sugar
1. The cafeteria is serving a mysterious food for lunch today.
Mr. Horton, concerned about his wonderful students, has
decided to help them out. I conducted a test for starch,
sugar, and protein to try to determine what the food is (it
isn’t necessarily one we tested in class). The starch test
was brown but not black. The sugar and protein test are
shown below. Based on these results, what food do you
think it could be and Why?
Sugar Test
Protein test
2. Answer in 2-3 sentences:
Drew has been buying protein shakes
from his gym to gain muscle, but they
do not have nutrition facts. How could
he determine whether they actually
have much protein in them? (Be
specific about what he would do,
what he would measure, etc)
PROTEINS!!
Made up of amino acid building blocks
– 1000’s of functions:
• muscle movement
• digestive enzymes
• Antibodies
– Body structures are made of proteins
• Hair, fingernails, muscles, enzymes
• Each kind of protein has a special shape
– Starts out as a long chain of amino acids
– The chain of amino acids then folds up into a
unique 3-D shape
– Function and shape go together
• 2 examples of “Shape & Function Match”
–A) Hemoglobin
• Function
–carry oxygen in blood
• Shape is like a “cage”
–Oxygen fits perfectly inside cage
• Muscle Protein
– Function
• Contract & relax to cause movement
– Shape
• long & thin with “teeth” like combs
• Teeth grip & ungrip like Velcro
• Slide to get longer & shorter
More Overlap = shorter muscle
Less Overlap = longer muscle
THINK PAIR SHARE
1. Could hemoglobin do the job of
muscle protein?
2. Could muscle protein do the job of
hemoglobin?
WHY NOT?
Holy cow muscles are cool
• http://www.youtube.com/watch?v=CepeYF
vqmk4
5 pts: Protein Q & A
1) What are the building blocks for proteins?
2) Proteins start out __________________ & end up
___________________________.
3) Explain how “Shape Matches Function” for
hemoglobin.
4) Explain how “Shape Matches Function” for muscle
proteins.
5) What are 2 other examples protein functions other
than hemoglobin and muscle protein?
6) How can proteins have so many different shapes
and functions in the body?
Don’t have to write the question
But write In complete sentences