BCHS 3304 - Quiz 2 Antunes (Chapters 6 & 7, Lectures 5,6,8,9) | Questions with 100% Verified Answers | Latest Update

BCHS 3304 - Quiz 2 Antunes (Chapters 6 & 7, Lectures
5,6,8,9) | Questions with 100% Verified Answers | Latest
Update
Question:
1º structure

Answer:
AA sequence (linear order)


Question:
2º structure

Answer:
location spatial alignment of AA backbone without regard to side chains, a-helix, b- sheets, random
coil, b-turns (helix)


Question:
3º

Answer:
3D structure of entire polypeptide, fold, biological function, catalytic mechanism (B chain of
hemoglobin)


Question:
4º

Answer:
3º structures of 2 or more polypeptide chains of a protein interact, spatial arrangements of subunits
(4 chains of hemoglobin into a protein)


Question:
Answer:
Most proteins have a "stable" native conformation


Question:
Native conformation is stabilized through non-covalent interactions

Answer:
hydrophobic, h-bonds, ionic, van der waals


Question:
Pauling and Corey determined structure of peptide bond by xray

Answer:

, 40% double bond character (amide, longer/peptide bond), planar conformation maxes πbond
overlap, resonance gives stability


Question:
Non polar AA

Answer:
G, A, V, L, I, M, P, F, W


Question:
Polar uncharged AA

Answer:
S, T, N, Q, Y, C


Question:
Polar charged AA

Answer:
D -1, E -1, K +1, R +1, H+1


Question:
GLYCINE

Answer:
GLY, G


Question:
ALANINE

Answer:
ALA, A


Question:
VALINE

Answer:
VAL, V


Question:
LEUCINE

Answer:
LEU, L