Quaternary arrangement of more than one polypeptide

Quaternary - arrangement of more than one polypeptide chain in a single protein;
only occurs in proteins containing more than one polypeptide chain, like
hemoglobin.
e. - What is the difference in function between fibrous and globular proteins?
i. Fibrous - elongated strands that function in structure or contraction, like collagen
(found in tendons and hair) and tropomyosin, a protein in muscle cells.
ii. Globular - irregular and bulky, acting as chemical messengers for intercellular
communication, receptors that bind chemical messengers, carrier proteins to
transport substances in blood or across membranes, and enzymes that catalyze
chemical reactions in the body.
f. - What is the function of proteins as chemical messengers, receptors, carrier proteins,
and enzymes?
g. - What are glycoproteins and lipoproteins?
i. Glycoproteins have carbs attached to the polypeptide chains; contribute to cell
recognition, so immune cells know the difference between friend and foe
ii. lipoproteins have lipids attached to them; found in blood, transporting lipids
11. Nucleotides and Nucleic Acids
12. Cell Structure , 2.2 page 29
13. Structure of the Plasma Membrane
a. - What is the role of the plasma membrane and what other membranes are similar to it?

i. Separates cell from environment, nuclear envelope, and membrane bound
organelles
14. Phospholipid Bilayer