Navigation » List of Schools » West Los Angeles College » Chemistry » Chem 221 – Biochemistry for Science Majors » Fall 2021 » L5 3D Structure of Proteins Part 1 of 2
Below are the questions for the exam with the choices of answers:
Question #1
A The hydrophilic exterior
B The hydrophilic interior
C The hydrophobic interior
D The hydrophobic exterior
Question #2
A Beta-pleated sheets
B R-group interactions
C The linear sequence of specific amino acids
D Alpha-helices
E The hydrophobic effect
Question #3
A A polypeptide chain 3-D structure
B How the polypeptide chains arrange in space
C The four parts of a protein’s amino acid sequence
D The layout of alpha-helices and beta-sheets
E The sequence of nucleic acids
Question #4
A peptide bonds
B Ionic
C Hydrophobic
D hydrogen bonding
Question #5
A Ionic
B Hydrophobic
C disulfide
D hydrogen bonding
Question #6
A alkynes
B alkanes
C hydrocarbons
D alkenes
Question #7
A a covalent ether bond
B a covalent amide bond
C a covalent bond
D an ether bond
E an amide bond
Question #8
A 2 molecules of water
B 4 molecules of water
C 5 molecules of water
D 3 molecules of water
Question #9
A Neither globular nor fibrous proteins
B Globular proteins
C Both globular fibrous proteins
D Fibrous proteins
Question #10
A The hydrophilic exterior
B The hydrophilic interior
C The hydrophobic interior
D The hydrophobic exterior
Question #11
A TRUE
B FALSE
Question #12
A won’t be affected
B will be affected
Question #13
A phenylalanine
B aspartic acid
C tryptophan
D glycine
E alanine
Question #14
A TRUE
B FALSE
Question #15
A Releases 3 water molecules
B Releases 4 water molecules
C Requires 3 water molecules
D Requires 4 water molecules
Question #16
A Randomly interspersed throughout to protein
B On the surface of the protein
C Localized to the N-terminus of the protein
D Localized to the C-terminus of the protein
E Buried in the center of the protein
Question #17
A TRUE
B FALSE
Question #18
A FALSE
B TRUE
Question #19
A glutamic acid
B alanine
C cysteine
D glycine
Question #20
A the function of all proteins in an organism
B the secondary structure of a protein
C the primary structure of the hemoglobin protein
D the primary structure of the myoglobin protein
Question #21
A FALSE
B TRUE
Question #22
A All proteins have a quaternary structure
B A protein’s function depends on its spatial conformation
C pH does not change the protein conformation
D Disulfide bridges primarily maintain secondary structures, as opposed to tertiary
Question #23
A A protein chain
B The end of a protein with a free amine group
C The end of a protein with a free carboxylic acid group
D The first amino acid with the abbreviation ‘N’ in the protein
Question #24
A The peptide bond is not planar, it can actually rotate relatively freely
B Partial double bond character of the peptide bond
C Hydrogen bonding between amino acid side chains and water
D The fully double bonded peptide bond
E Electronegativity differences between nitrogen and carbon
Question #25
A 2
B 5
C 4
D 6
E 3
Question #26
A releases 2 molecules of water
B requires 2 molecules of water
C releases 3 molecules of water
Question #27
A amino
B double
C peptide
D ionic
E hydrogen
Question #28
A 102
B 98
C 100
D 101
E 99
Question #29
A is weaker than an ordinary single bond.
B still isn’t completely understood by chemists.
C has partial double bond character.
Question #30
A planar, but rotates to three preferred dihedral angles.
B not cleavable by hydrolysis.
C nonpolar, and fixed in a trans conformation
D nonpolar, but rotates to three preferred dihedral angles.
E planar, and usually found in a trans configuration.
Question #31
A 3 amino acids and 3 peptide bonds
B 3 amino acids and 4 peptide bonds
C 3 amino acids and 1 peptide bond
D 3 amino acids and 2 peptide bonds
Question #32
A Metallic bond
B Hydrogen bond
C Covalent bond
D ionic bond
Question #33
A Hydroxyl group is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
B Hydrogen atom is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
C Hydroxyl group is lost from its carboxyl group of one amino acid and a hydrogen atom is lost from its amino group of another amino acid
D Hydrogen atom is lost from its carboxyl group of one amino acid and a hydroxyl group is lost from its amino group of another amino acid
Question #34
A FALSE
B TRUE
Question #35
A FALSE
B TRUE
Question #36
A FALSE
B TRUE
Question #37
A TRUE
B FALSE
Question #38
A TRUE
B FALSE
Question #39
A TRUE
B FALSE
Question #40
A have their hydrophilic side chains are on the outside, exposed to the solvent, water.
B All of these are correct
C are roughly spherical in shape
D have their hydrophobic amino acid side chains are in the interior of the molecule
E are water soluble