JMU BIO 140 LATEST UPDATED RECENT
QUESTIONS AND ANSWERS SURE A+
✔✔What is the basic structure of quaternary structure? - ✔✔multiple polypeptide
subunits
✔✔What are the two structures of secondary structure? - ✔✔alpha-helices and beta-
sheets
✔✔What type of bonds form between C=O and N-H of the peptide backbone? -
✔✔hydrogen bond
✔✔Are R-groups involved in secondary structure? - ✔✔no
✔✔Where are the R groups located in secondary structure? - ✔✔outward
✔✔What dictates the interaction of secondary structure? - ✔✔chemistry of the R-group
✔✔How are beta-sheets stabilized between strands? - ✔✔hydrogen bonds
✔✔What are the two varieties of beta-sheets? - ✔✔-anti-parallel
-parallel
, ✔✔What is the N in beta-sheets? - ✔✔amino terminus
✔✔What is the C in beta-sheets? - ✔✔carboxyl terminus
✔✔What type of beta sheet is more stable? - ✔✔anti-parallel
✔✔How are the R groups in the beta-sheets oriented? - ✔✔up or down
✔✔What is the tertiary structure made of? - ✔✔-alpha helix
-beta sheets
-loops and turns
-disulfide bridge
✔✔Amino acid with -O is uncharged when? - ✔✔high H+
✔✔Amino acid with -O is becomes negative when? - ✔✔low H+
✔✔Amino acid with N+ is uncharged when? - ✔✔low H+
✔✔Amino acid with N+ is charged when? - ✔✔high H+
✔✔Folded polypeptide chains that are folded up are held by what? - ✔✔weak
noncovalent bonds
✔✔Where do hydrophilic amino acids reside? - ✔✔outside
✔✔Where do hydrophobic amino acids reside? - ✔✔inside
✔✔What helps to stabilize a 3-D structure? - ✔✔disulfide bonds
✔✔Bonds within a single polypeptide or bonds between polypeptides is what? -
✔✔quaternary structure
✔✔What is a quaternary structure made of? - ✔✔multiple polypeptide chains
✔✔What is a common quaternary structure? - ✔✔hemoglobin
✔✔Define dimer - ✔✔interaction between a single, identical binding site on each
monomer
✔✔How are quaternary structures stabilized? - ✔✔non-covalent bonds
QUESTIONS AND ANSWERS SURE A+
✔✔What is the basic structure of quaternary structure? - ✔✔multiple polypeptide
subunits
✔✔What are the two structures of secondary structure? - ✔✔alpha-helices and beta-
sheets
✔✔What type of bonds form between C=O and N-H of the peptide backbone? -
✔✔hydrogen bond
✔✔Are R-groups involved in secondary structure? - ✔✔no
✔✔Where are the R groups located in secondary structure? - ✔✔outward
✔✔What dictates the interaction of secondary structure? - ✔✔chemistry of the R-group
✔✔How are beta-sheets stabilized between strands? - ✔✔hydrogen bonds
✔✔What are the two varieties of beta-sheets? - ✔✔-anti-parallel
-parallel
, ✔✔What is the N in beta-sheets? - ✔✔amino terminus
✔✔What is the C in beta-sheets? - ✔✔carboxyl terminus
✔✔What type of beta sheet is more stable? - ✔✔anti-parallel
✔✔How are the R groups in the beta-sheets oriented? - ✔✔up or down
✔✔What is the tertiary structure made of? - ✔✔-alpha helix
-beta sheets
-loops and turns
-disulfide bridge
✔✔Amino acid with -O is uncharged when? - ✔✔high H+
✔✔Amino acid with -O is becomes negative when? - ✔✔low H+
✔✔Amino acid with N+ is uncharged when? - ✔✔low H+
✔✔Amino acid with N+ is charged when? - ✔✔high H+
✔✔Folded polypeptide chains that are folded up are held by what? - ✔✔weak
noncovalent bonds
✔✔Where do hydrophilic amino acids reside? - ✔✔outside
✔✔Where do hydrophobic amino acids reside? - ✔✔inside
✔✔What helps to stabilize a 3-D structure? - ✔✔disulfide bonds
✔✔Bonds within a single polypeptide or bonds between polypeptides is what? -
✔✔quaternary structure
✔✔What is a quaternary structure made of? - ✔✔multiple polypeptide chains
✔✔What is a common quaternary structure? - ✔✔hemoglobin
✔✔Define dimer - ✔✔interaction between a single, identical binding site on each
monomer
✔✔How are quaternary structures stabilized? - ✔✔non-covalent bonds
