CSU BMS 300 EXAM 1 QUESTIONS AND
ANSWERS
Water - ANSWER H2O, molecular weight=18, oxygen is partial negative
charge, hydrogen has a slight positive charge.
What is a dipole moment? - ANSWER difference in charge on two ends of a
molecule
Anions - ANSWER negatively charged ions
Cations - ANSWER positively charged ions
covalent bond - ANSWER A chemical bond is formed when two atoms share
electrons
hydrogen bond - ANSWER Attraction between a slightly positive hydrogen
atom and a slightly negative atom.
osmosis - ANSWER diffusion of water through aquaporins
diffusion - ANSWER Movement of molecules from an area of higher
concentration to an area of lower concentration.
hydrophilic - ANSWER water loving, charged, polar
Hydrophobic - ANSWER Water fearing, uncharged, nonpolar
,Lipids - ANSWER fats, oils. hydrophobic
Triglycerides - ANSWER glycerol (3 carbon alcohol) + 3 fatty acids. use of
esterbond
esterbond - ANSWER Carbon-oxygen-fatty acid. uses dehydration
amphipathic molecules - ANSWER containing hydrophobic and hydrophilic
regions
phosphate head group - ANSWER region of phospholipid bilayer that is
hydrophillic
Micelle - ANSWER lipid molecules that arrange themselves in a spherical
form in aqueous solutions. rare and unstable
liposome - ANSWER phospholipid molecules organized as a bilayer sphere.
stable.
planar bilayer - ANSWER makes up membranes of cells, most stable, both
outside and inside of membrane is hydrophilic (aqueous)
phospholipid bilayer - ANSWER A double layer of phospholipids that makes
up membranes. proteins will be involved as a hydrophilic pathway (ion channel)
protein - ANSWER amino acid sequence linked by peptide bonds
, Amino acid structure - ANSWER H, NH2, COOH bonded to a central carbon
and then a variable R group
Primary protein structure - ANSWER amino acid sequence linked by peptide
bonds. NH and COOH terminus
Secondary protein structure - ANSWER hydrogen bonding. alpha helix or beta
sheet.
Tertiary protein structure - ANSWER 3D structure of proteins determined by
R groups. functioning proteins
alpha helix - ANS A spiral shape constituting one form of the secondary
structure of proteins, arising from a specific hydrogen-bonding structure within
helix
beta pleated sheet - ANS One form of the secondary structure of proteins in
which the protein strand folds back and forth and has hydrogen bonding
between adjacent strands.
antiparallel beta sheet - ANS neighboring hydrogen-bonded
polypeptide chains run in opposite directions. NH-COOH and COOH-NH
parallel beta sheet - ANSWER all of the N-termini of successive strands are
oriented in the same direction. NH-COOH and NH-COOH
ANSWERS
Water - ANSWER H2O, molecular weight=18, oxygen is partial negative
charge, hydrogen has a slight positive charge.
What is a dipole moment? - ANSWER difference in charge on two ends of a
molecule
Anions - ANSWER negatively charged ions
Cations - ANSWER positively charged ions
covalent bond - ANSWER A chemical bond is formed when two atoms share
electrons
hydrogen bond - ANSWER Attraction between a slightly positive hydrogen
atom and a slightly negative atom.
osmosis - ANSWER diffusion of water through aquaporins
diffusion - ANSWER Movement of molecules from an area of higher
concentration to an area of lower concentration.
hydrophilic - ANSWER water loving, charged, polar
Hydrophobic - ANSWER Water fearing, uncharged, nonpolar
,Lipids - ANSWER fats, oils. hydrophobic
Triglycerides - ANSWER glycerol (3 carbon alcohol) + 3 fatty acids. use of
esterbond
esterbond - ANSWER Carbon-oxygen-fatty acid. uses dehydration
amphipathic molecules - ANSWER containing hydrophobic and hydrophilic
regions
phosphate head group - ANSWER region of phospholipid bilayer that is
hydrophillic
Micelle - ANSWER lipid molecules that arrange themselves in a spherical
form in aqueous solutions. rare and unstable
liposome - ANSWER phospholipid molecules organized as a bilayer sphere.
stable.
planar bilayer - ANSWER makes up membranes of cells, most stable, both
outside and inside of membrane is hydrophilic (aqueous)
phospholipid bilayer - ANSWER A double layer of phospholipids that makes
up membranes. proteins will be involved as a hydrophilic pathway (ion channel)
protein - ANSWER amino acid sequence linked by peptide bonds
, Amino acid structure - ANSWER H, NH2, COOH bonded to a central carbon
and then a variable R group
Primary protein structure - ANSWER amino acid sequence linked by peptide
bonds. NH and COOH terminus
Secondary protein structure - ANSWER hydrogen bonding. alpha helix or beta
sheet.
Tertiary protein structure - ANSWER 3D structure of proteins determined by
R groups. functioning proteins
alpha helix - ANS A spiral shape constituting one form of the secondary
structure of proteins, arising from a specific hydrogen-bonding structure within
helix
beta pleated sheet - ANS One form of the secondary structure of proteins in
which the protein strand folds back and forth and has hydrogen bonding
between adjacent strands.
antiparallel beta sheet - ANS neighboring hydrogen-bonded
polypeptide chains run in opposite directions. NH-COOH and COOH-NH
parallel beta sheet - ANSWER all of the N-termini of successive strands are
oriented in the same direction. NH-COOH and NH-COOH
