Download Friday, February 6, 2009 - Answer Sheet

SBI3U – Assigned Homework
Friday, February 6, 2009 – Answer Sheet
Read Pages 23 - 25
Know: 1:
-
Section 1.4
Proteins
Basic structure of an amino acid – (draw the basic structure)
two functional groups
Circle and name the functional groups on the following amino acid diagrams:
Alanine:
Valine
2:
What makes the 20 amino acids different?
3:
What is a peptide bond?
between which functional groups do they form?
Circle the peptide bond(s) and functional groups (name them) on the following diagram:
be able to draw a representative condensation or hydrolysis reaction between two amino acids
(draw a series of diagrams putting the two Amino Acids (above) together in a Dehydration
(Condensation) reaction showing the two functional groups reacting, what is being added or released, the
resultant dipeptide and name the bond formed
4:
What is a polypeptide?
primary
secondary
tertiary
quaternary structures
disulfide bridges
List the final structure of the following two proteins. Give a reason why you answered the way you did.
What is holding the following two
polypeptides together in the following
diagram:
Know the different methods proteins are held in their tertiary and quaternary shapes, as outlined by the Figure
below.
Page 25:
Understanding Concepts
1, 2, 4