Save
...
T1 Biological molecules
1 Biological molecules (sd)
1.6 Proteins
Save
Share
Learn
Content
Leaderboard
Learn
Created by
India Kennedy
Visit profile
Cards (24)
What are the monomers from which proteins are made?
Amino acids
View source
What groups do amino acids contain?
Amino group
,
carboxylic acid group
,
R group
View source
How many different amino acids are there?
20
View source
What type of bond joins amino acids?
Peptide bonds
View source
What is formed during the
condensation
reaction of
amino acids
?
A
molecule of water
View source
What is a
dipeptide
?
A molecule containing
two
amino acids
View source
What are
polypeptides
?
Molecules containing
three
or more
amino acids
View source
What determines the structure of proteins?
Order and number
of
amino
acids
Types of bonding
present
Shape
of the protein
View source
What is the primary structure of a protein?
The order and number of
amino acids
View source
How does the primary structure affect protein function?
It determines the
protein's
function
View source
What shapes can the secondary structure of proteins take?
Alpha helix
or
beta pleated sheet
View source
What causes the formation of hydrogen bonds in proteins?
Charge differences
in
-NH
and
-C=O
groups
View source
What is the tertiary structure of proteins?
The
3D
shape formed by
folding
View source
What types of bonds
maintain
the tertiary structure of proteins?
Disulfide
bridges
,
ionic
bonds,
hydrogen
bonds
View source
What are disulfide bridges?
Interactions between sulfur in
cysteine
View source
How do ionic bonds form in proteins?
Between
carboxyl
and
amino groups
View source
Why are ionic bonds considered weaker than disulfide bridges?
They are easily broken by
pH
View source
What characterizes
globular
proteins?
They are
compact
in structure
View source
What is an example of a fibrous protein?
Keratin
View source
What is the Biuret test used for?
Tests for presence of
peptide bonds
Detects
proteins
in food
View source
What is the first step of the Biuret test?
Add
sodium hydroxide
to the sample
View source
What is added after
sodium
hydroxide
in the
Biuret
test?
Dilute
copper
(II)
sulfate
solution
View source
What indicates a
positive
result in the Biuret test?
A
purple coloration
View source
What does a negative result in the Biuret test look like?
The solution remains blue
View source