Name _____________________
Table _____ Period _____
Understand denaturation of protein
Tell some of its causes and effects
Take notes as you watch the
Protein Power Point.
1. Complete protein comes from _______________ products. Name 3 complete proteins.
a)
b)
c)
Incomplete protein comes from the ___________ of plants. Name 3 incomplete proteins.
a)
b)
c)
2. Proteins perform many functions in our bodies. Our cell structure is based on protein, and
protein forms the enzymes that help our bodies work.
Proteins also perform many functions in our foods:
Provide ___________________ so we can build the proteins
our bodies need.
Provide ___________ & texture to foods.
Allow retention of __________ & __________
Coagulate to _____________ foods.
Help foods brown
________ (hold) ingredients together.
3.
Proteins can undergo a change called denaturation. Mark these statements about denaturation true or false.
T or F Statement
a) Denaturation occurs when something weakens the bonds in the protein.
b) Denaturation means “remove the nature of”
c) Denatured proteins react the same way they did before denaturation.
d) During denaturation, the protein molecule unfolds into a new shape.
e) Every bond in the protein is broken during denaturation.
f) Denatured proteins are biologically active.
g) SOMETIMES, denatured proteins can refold into the original protein.
h) Denatured proteins have the same amino acids as the original protein.
4.
Draw a protein before and after denaturation.
Before:
After:
5. Denaturation could cause some of these effects in protein:
a) Loss of _______________ activity.
b) Greater ________________.
c) Destruction of _______________.
d) Increased _________________.
e) Decreased __________________.
f) Changes in ability to bind _________________.
6. Name some things (agents) that could cause protein to denature.
a)
b)
c)
d)
Show you can reach today’s target:
Define denaturation of protein
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
tell some of its causes and effects
Causes
Effects