1154 Proteins

Question 0

roles of proteins

Answer 0

Defense: like fibrin for blood clot
Enzymes: highly specific biological catalyst, speed up reaction rate

Question 1

Proteins are a polymer of?

Answer 1

amino acids are the monomers

Question 2

Enzyme suffix

Answer 2

-ase

Example sucrase breaks down sucrose.

Question 3

How many amino acids are essential

Answer 3

12 non,
8 essential (not made in humans)

Question 4

What are the four levels of protein structure?

Answer 4

Primary
Secondary
Tertiary
Quaternary (some)

Question 5

Primary structure (protein)

Answer 5

Linear sequence of amino acids, joined by peptide bonds (a form of covalent), order determined by genetics, will ultimately affect secondary structure. Particular AA sequence in linear form determines protein type.

Question 6

Secondary structure (protein)

Answer 6

Formed by regular hydrogen bonds forming at regular intervals along polypeptide backbone. Alpha-helices and beta-pleated sheets. Changes in primary structure can alter secondary structure.

Question 7

Tertiary structure (protein)

Answer 7

Formed by covalent bonding (called disulfide bridges) between R-groups (disulfide bonds between cystines). Also ionic, hydrogen bonds and hydrophobic interactions play roles.

Question 8

Quaternary structure (proteins)

Answer 8

Some (not all) tertiary proteins interact together to form a quaternary protien, using the same bonding mechanisms as tertiary level.