CHEM 1205 UPDATED LATEST EXAMS SCRIPT
QUESTIONS AND ANSWERS SURE A+
✔✔How does hydrolysis affect a disaccharide? - ✔✔It cleaves the C-O glycosidic
linkage and forms two monosaccharides.
✔✔What monosaccharides does sucrose contain? - ✔✔Glucose and fructose
✔✔What are three examples of artificial sweeteners? - ✔✔Aspartame, Saccharine,
Sucralose
✔✔Where is cellulose found? - ✔✔Cell walls of all plants
✔✔Why can humans not digest cellulose? - ✔✔Humans do not posses the enzyme to
hydrolyze cellulose
✔✔Is cellulose branched or unbranched? - ✔✔unbranched
✔✔What enzyme digests starch? - ✔✔Amylase
✔✔Name two examples of starch. - ✔✔Amylose and amylopectin
, ✔✔What is the major form of polysaccharide storage in animals? - ✔✔Glycogen
✔✔What characteristic of glycogen makes it easy fro hydrolysis to occur? -
✔✔Glycogen is highly branched so there are many ends available for hydrolysis
✔✔What bonds form by joining amino acids? - ✔✔Amide bonds
✔✔What functional groups do amino acids contain? - ✔✔Amino group and carboxyl
group
✔✔L-amino acids have the -NH3+ group on the _____________. - ✔✔Left
✔✔D amino acids have the -NH3+ group on the _______________. - ✔✔Right
✔✔T or F? All amino acids except glycine, have a chirality center at the a-carbon. -
✔✔True
✔✔What charge do zwitterions have? - ✔✔They are electrically neutral
✔✔What is the most important property of the R-groups on amino acids? - ✔✔Polarity
✔✔What does the net charge on an amino acid depend on? - ✔✔pH
✔✔What is the isoelectric point? - ✔✔The pH at which the majority of the molecules of a
compound have no net charge.
✔✔What are the 4 levels of protein structure? - ✔✔Primary, Secondary, Tertiary, and
Quaternary
✔✔What is the secondary structure of a protein? - ✔✔3D arrangement of localized
regions of a protein.
a-helix and B-pleated sheet
✔✔What do the C=O bonds and N-H bonds look like in an a-helix? - ✔✔C=O bonds are
all pointing up
N-H bonds are pointing down
✔✔What do the r-groups look like in a B-pleaded sheet? - ✔✔R-groups alternate up
and down
✔✔The tertiary structure is stabilized by what four different interactions? - ✔✔Hydrogen
Bonding, London Dispersion Forces, Disulfide Bonds, Electrostatic Interactions
QUESTIONS AND ANSWERS SURE A+
✔✔How does hydrolysis affect a disaccharide? - ✔✔It cleaves the C-O glycosidic
linkage and forms two monosaccharides.
✔✔What monosaccharides does sucrose contain? - ✔✔Glucose and fructose
✔✔What are three examples of artificial sweeteners? - ✔✔Aspartame, Saccharine,
Sucralose
✔✔Where is cellulose found? - ✔✔Cell walls of all plants
✔✔Why can humans not digest cellulose? - ✔✔Humans do not posses the enzyme to
hydrolyze cellulose
✔✔Is cellulose branched or unbranched? - ✔✔unbranched
✔✔What enzyme digests starch? - ✔✔Amylase
✔✔Name two examples of starch. - ✔✔Amylose and amylopectin
, ✔✔What is the major form of polysaccharide storage in animals? - ✔✔Glycogen
✔✔What characteristic of glycogen makes it easy fro hydrolysis to occur? -
✔✔Glycogen is highly branched so there are many ends available for hydrolysis
✔✔What bonds form by joining amino acids? - ✔✔Amide bonds
✔✔What functional groups do amino acids contain? - ✔✔Amino group and carboxyl
group
✔✔L-amino acids have the -NH3+ group on the _____________. - ✔✔Left
✔✔D amino acids have the -NH3+ group on the _______________. - ✔✔Right
✔✔T or F? All amino acids except glycine, have a chirality center at the a-carbon. -
✔✔True
✔✔What charge do zwitterions have? - ✔✔They are electrically neutral
✔✔What is the most important property of the R-groups on amino acids? - ✔✔Polarity
✔✔What does the net charge on an amino acid depend on? - ✔✔pH
✔✔What is the isoelectric point? - ✔✔The pH at which the majority of the molecules of a
compound have no net charge.
✔✔What are the 4 levels of protein structure? - ✔✔Primary, Secondary, Tertiary, and
Quaternary
✔✔What is the secondary structure of a protein? - ✔✔3D arrangement of localized
regions of a protein.
a-helix and B-pleated sheet
✔✔What do the C=O bonds and N-H bonds look like in an a-helix? - ✔✔C=O bonds are
all pointing up
N-H bonds are pointing down
✔✔What do the r-groups look like in a B-pleaded sheet? - ✔✔R-groups alternate up
and down
✔✔The tertiary structure is stabilized by what four different interactions? - ✔✔Hydrogen
Bonding, London Dispersion Forces, Disulfide Bonds, Electrostatic Interactions
