Ch. 1-3 Proteins

Question 0

Shape of proteins

Answer 0

Each has unique 3D shape

Question 1

Polymer of amino acids

Answer 1

Proteins

Question 2

How do proteins vary

Answer 2

Sequence of amino acids

Question 3

Importance of proteins

Answer 3

Major components of cell parts
Provide support
Storage of amino acids

Question 4

Types of proteins

Answer 4

Receptor proteins
Contractile proteins
Antibodies
Enzymes

Question 5

Building block of proteins

How many are there

Answer 5

Amino acids

20

Question 6

How do you classify proteins

Answer 6

Based on properties of side chain

Question 7

Nonpolar

Answer 7

Hydrocarbon chains
No oxygen

CH

Question 8

Polar

Answer 8

Oxygen present
Sometimes sulfur
No charge
                                CH2
                                    I
                                  / C \\
                             NH2     O

Question 9

Polar charged acidic

Answer 9

Negative charge
Donate H+ to solution

CH2 - CH2 - C = O
\
O-

Question 10

Polar charged basic

Answer 10

Positive charge
Gain H+ from solution

NH3+ at end

Question 11

What is the protein confirmation

Answer 11

Unique 3D shape

Question 12

Describe primary protein shape

Answer 12

Sequence of amino acids
Determined by genes

(Sequence of bases in DNA)

Question 13

What are the two types of secondary protein conformation

Answer 13

Alpha helix that looks like a spiral

Beta pleated sheet

Question 14

Describe the secondary protein shape

Answer 14

Regular repeated folding of peptide chain

Question 15

What is the folding of the peptide chain in the secondary protein shape stabilized by

Answer 15

Hydrogen bonds

Question 16

Describe the tertiary protein conformation

Answer 16

Globular proteins
Irregular contortion
Enzymes

Question 17

How is the shape of the tertiary protein conformation stabilized

Answer 17

By hydrogen bonds, ionic bonds, hydrophobic interactions, disulfide bridges

Question 18

Describe the quaternary protein conformation

Answer 18

Interaction of several polypeptides
Three or more tertiary put together

Example is collagen and hemoglobin

Question 19

Purpose of hemoglobin

Number of polypeptide chains

Answer 19

Carries oxygen

4

Question 20

What is collagen

Answer 20

The binding protein in skin

Question 21

When a protein loses its shape and therefore its function

Answer 21

Denaturation

Question 22

What causes denaturation

Answer 22

Heat
Changes in pH more acidic
Any environmental toxin
Radioactivity or UV

Question 23

What does a peptide bond between two amino acids look like

Answer 23

O H
I I I
C - N