Proteins

Question 1

What are the proteins functions?

Answer 1

1. enzyme catalysts
2. defense
3. transport (carry out the orders directed from your genes)
4. support
5. motion (ATP)
6. regulation (hormones)
7. storage

Question 2

What is the information flow?

Answer 2

DNA»>RNA»>Protein

Question 3

Protein monomer?

Answer 3

Amino acid

Question 4

What is the backbone?

Answer 4

It’s a sequence that repeats. NCC NCC NCC (N-Terminal to C-Terminal)

Question 5

What is hydrophobic?

Answer 5

Doesn’t like water, non polar

Question 6

What is hydrophilic?

Answer 6

Likes water, polar

Question 7

Main chain atoms bond to form..?

Answer 7

Primary structure in protein

Secondary structure

Question 8

R-Groups or side chains bond to form..?

Answer 8

Tertiary structure

Quaternary structure

Question 9

How are amino acids bond together?

Answer 9

Peptide bond [dehydration synthesis (water is removed)]

Question 10

Protein Primary Structure

Answer 10

A Specific sequence of amino acids are linked by peptide bond forming a string of amino acids

Question 11

Each protein type has a unique sequence of amino acids

Answer 11

OK

Question 12

Protein Secondary Structure

Answer 12

due to H-bonding in main chain it forms:

• Alpha (a-helix)
• Beta (B-pleated sheet)

Question 13

Protein Tertiary Structure

Answer 13

(Folding of ONE polypeptide)

• Hydrogen bonding
• Ionic bonding
• Hydrophobic interactions including hydrophobic exclusions
• Disulfide bridges between cysteines

Question 14

Protein Quaternary Structure

Answer 14

Union of two or more polypeptides held by the same interactions between side chain functional groups seen 3°- level

Question 15

Name 2 quaternary forms of protein.

Answer 15

• Fibrous (3 polypeptides used for strength)

- Globular (4 polypeptides like enzymes, transport)