3.2 proteins

Question 1

proteins

Answer 1

polymers made up of amino acids

Question 2

polypeptide chain

Answer 2

unbranched polymers of covalently linked amino acids

Question 3

structure of Amino Acid

Answer 3

carboxyl group, amino group, central carbon, side chain and hydrogen

Question 4

disulfide bridge

Answer 4

two cysteine molecules in a polypeptide chain form by removal of H. determines how a polypeptide chain folds

Question 5

peptide linkage

Answer 5

joins amino acid monomers together. carboxyl group of one amino acid reacts with one amino acid, undergoing condensation. peptide bond carry partial charges that favors hydrogen bond

Question 6

primary structure

Answer 6

Amino acid monomers are joined by peptide bonds forming polypeptide chain

Question 7

secondary structure

Answer 7

polypeptide chains may form alpha helix or beta pleated sheets through hydrogen bonds

Question 8

Tertiary

Answer 8

Polypeptides fold, forming specific shapes. stabilized by disulfide bridges, hydrogen bonds and hydrophobic interactions

Question 9

quaternary

Answer 9

two or more polypeptide assemble to form larger protein molecules. stabilized by hydrogen bond, disulfide bridge, ionic and hydrophobic interactions.

Question 10

Denatured

Answer 10

the disruption of secondary and tertiary due to moderate heat

Question 11

covalent modification

Answer 11

modification of protein structure by the covalent bonding of a chemical group to the side chain of an amino acid

Question 12

chaperones

Answer 12

special class of proteins that protect the 3-D structures by surrounding new or denatured proteins and prevent them from binding to the wrong substance.