BIOCHEMISTRY ACS FINAL EXAM QUESTIONS
WITH 100% COMPLETE AND ACCURATE
SOLUTIONS
What is the D configuration of a sugar in a Fisher projection? - Correct
Answer-chyrol carbon furthest from the carboxyl group
hydroxyl on right
What is the L configuration of a sugar in a Fisher projection? - Correct
Answer-hydroxyl on left
What is the difference between glycogen and amylopectin? - Correct Answer-
glycogen- has branches about every 10 residues (more highly branched)
amylopectin- has branches about every 25
What is amylose made up of? - Correct Answer-glucose
What makes up starch? - Correct Answer-amylose
amylopectin
What is a glycosidic bond? - Correct Answer-links two monosaccharides
together at points 1 and 4
What is the difference between an alpha(1-4) and beta(1-4) linkage? -
Correct Answer-alpha: when the oxygen is pointed down in a glycosidic bond
beta: when the oxygen is pointed up in a glycosidic bond
What is the definition of a carbohydrate? - Correct Answer-all have hydroxyl
and carbonyl functional groups
Difference between aldose and ketose - Correct Answer-aldose has an
aldohyde
ketose has a ketone
What makes up sucrose? - Correct Answer-fructose and glucose
monosaccharides
What makes up lactose? - Correct Answer-glucose and galactose
monosaccharides
, What makes up mannose? - Correct Answer-two glucose monosaccharides
What are lipids? - Correct Answer-soluble in other nonpolar solvents (not
water)
What are triglycerides composed of? - Correct Answer-glycerol and three
fatty acids
What is saponification? - Correct Answer-base hydrolysis of a triglyceride or
other fat
strong base is added
breaks ester linkages to release hydroxyls and form glycerol
What has a higher level of unsaturation -- oils or fats? - Correct Answer-oils
liquid at room temperature
What is the structure of the plasma membrane? - Correct Answer-hydrophylic
head
hydrophobic fatty acid tails
proteins span the phospholipid bilayer
Why type of amino acid is present in the plasma membrane among the fatty
acid tails? - Correct Answer-hydrophobic/nonpolar
What is passive transport (simple diffusion)? - Correct Answer-no energy
required
no protein required
move from high concentration to low concentration
water, gases, ethanol (small nonpolar) can pass through
What is facilitated diffusion? - Correct Answer-requires protein
no energy required
molecules are two large to go through on their own
What is active transport? - Correct Answer-energy is required
moves from low to high concentration
How many carbon atoms do most fatty acids have? - Correct Answer-even
number
WITH 100% COMPLETE AND ACCURATE
SOLUTIONS
What is the D configuration of a sugar in a Fisher projection? - Correct
Answer-chyrol carbon furthest from the carboxyl group
hydroxyl on right
What is the L configuration of a sugar in a Fisher projection? - Correct
Answer-hydroxyl on left
What is the difference between glycogen and amylopectin? - Correct Answer-
glycogen- has branches about every 10 residues (more highly branched)
amylopectin- has branches about every 25
What is amylose made up of? - Correct Answer-glucose
What makes up starch? - Correct Answer-amylose
amylopectin
What is a glycosidic bond? - Correct Answer-links two monosaccharides
together at points 1 and 4
What is the difference between an alpha(1-4) and beta(1-4) linkage? -
Correct Answer-alpha: when the oxygen is pointed down in a glycosidic bond
beta: when the oxygen is pointed up in a glycosidic bond
What is the definition of a carbohydrate? - Correct Answer-all have hydroxyl
and carbonyl functional groups
Difference between aldose and ketose - Correct Answer-aldose has an
aldohyde
ketose has a ketone
What makes up sucrose? - Correct Answer-fructose and glucose
monosaccharides
What makes up lactose? - Correct Answer-glucose and galactose
monosaccharides
, What makes up mannose? - Correct Answer-two glucose monosaccharides
What are lipids? - Correct Answer-soluble in other nonpolar solvents (not
water)
What are triglycerides composed of? - Correct Answer-glycerol and three
fatty acids
What is saponification? - Correct Answer-base hydrolysis of a triglyceride or
other fat
strong base is added
breaks ester linkages to release hydroxyls and form glycerol
What has a higher level of unsaturation -- oils or fats? - Correct Answer-oils
liquid at room temperature
What is the structure of the plasma membrane? - Correct Answer-hydrophylic
head
hydrophobic fatty acid tails
proteins span the phospholipid bilayer
Why type of amino acid is present in the plasma membrane among the fatty
acid tails? - Correct Answer-hydrophobic/nonpolar
What is passive transport (simple diffusion)? - Correct Answer-no energy
required
no protein required
move from high concentration to low concentration
water, gases, ethanol (small nonpolar) can pass through
What is facilitated diffusion? - Correct Answer-requires protein
no energy required
molecules are two large to go through on their own
What is active transport? - Correct Answer-energy is required
moves from low to high concentration
How many carbon atoms do most fatty acids have? - Correct Answer-even
number
