BIOC*2580 FINAL EXAM UPDATED
ACTUAL Exam Questions and CORRECT
Answers
How does separation by absorption chromatography work? - CORRECT ANSWER -
Triglycerides come out FIRST
Charged come out LAST
What are three biological functions of lipids? - CORRECT ANSWER - 1. energy storage
2. Enzyme cofactors
3. Steroid hormones
Carboxylic acid + alcohol= - CORRECT ANSWER - Ester (condensation)
Carboxylic acid + acid= - CORRECT ANSWER - Acid anhydride (condensation)
What are the commonly occurring saturated fatty acids?
"let my pal stay around" - CORRECT ANSWER - Laurate 12C
Myristate 14C
Palmitate 16C
Stearate 18C
Arachidate 20C
As chain length increases, melting point ________ - CORRECT ANSWER - Decreases
Commonly occuring unsaturated fatty acids? "Only Little Lizards Age"
(Unsaturated=more double bonds) - CORRECT ANSWER - Oleate (18:1 delta^9)
Linoleate (18:2 delta^9,12)
,Linolenate (18:3 delta^ 9,12,15)
Arachidonate (20:4 delta^5,8,11,14)
The addition of a phosphate group adds: - CORRECT ANSWER - Charges to the molecule
and increases water solubility
What is the net charge at pH 7 of Phosphatidylcholine (PC) "Lechithin" remember CHOLINE -
CORRECT ANSWER -0
What is the net charge at pH 7 of Phosphatiethylanoamine (PE) remember ETHYLAMINE -
CORRECT ANSWER -0
What is the net charge at pH 7 of Phoaphtidylserine
remember SERINE - CORRECT ANSWER - -1
What is the net charge at pH 7 of phosphatidylglycerol
remember GLYCEROL - CORRECT ANSWER - -1
What is an enantiomer? - CORRECT ANSWER - Mirror image
What is a diasteriomer? - CORRECT ANSWER - Differ at some carbons but not others-
different chemical properties
What is an epimer? - CORRECT ANSWER - Differ at just one chiral carbon
Aldehyde + alcohol= - CORRECT ANSWER - Hemiacetal
Ketone + alcohol= - CORRECT ANSWER - Hemiketal
, Which carbons attach during the cyclization of glucose? - CORRECT ANSWER - C-5
reacts with carbonyl C to form a 6 membered ring. The carbonyl is the electrophile.
What type of reaction is a glycosidic bond? - CORRECT ANSWER - Condensation
The anomeric carbon will always be attached to ___ oxygens - CORRECT ANSWER -2
Maltose = glucose + glucose = - CORRECT ANSWER - Reducing sugar
Trehalose= Glucose + glucose= - CORRECT ANSWER - Non-reducing sugar
Lactose= Galactose + glucose= - CORRECT ANSWER - Reducing sugar
Sucrose=glucose + fructose - CORRECT ANSWER - non reducing sugar
Amino acids + peptide bonds = - CORRECT ANSWER - proteins
What is the sugar in RNA? - CORRECT ANSWER - D-Ribose
What is the sugar in DNA and how does it differ from RNA? - CORRECT ANSWER - D-
2Deoxyribose, the OH group at C2 is missing. It has already been reduced.
What are the pyrimidines (the smaller ones) - CORRECT ANSWER - Cytosine and
Thymine and Uracil
What are the purines (the bigger ones) - CORRECT ANSWER - Adenine and Guanine
What makes up a nucleoSIDE: - CORRECT ANSWER - Base+sugar
ACTUAL Exam Questions and CORRECT
Answers
How does separation by absorption chromatography work? - CORRECT ANSWER -
Triglycerides come out FIRST
Charged come out LAST
What are three biological functions of lipids? - CORRECT ANSWER - 1. energy storage
2. Enzyme cofactors
3. Steroid hormones
Carboxylic acid + alcohol= - CORRECT ANSWER - Ester (condensation)
Carboxylic acid + acid= - CORRECT ANSWER - Acid anhydride (condensation)
What are the commonly occurring saturated fatty acids?
"let my pal stay around" - CORRECT ANSWER - Laurate 12C
Myristate 14C
Palmitate 16C
Stearate 18C
Arachidate 20C
As chain length increases, melting point ________ - CORRECT ANSWER - Decreases
Commonly occuring unsaturated fatty acids? "Only Little Lizards Age"
(Unsaturated=more double bonds) - CORRECT ANSWER - Oleate (18:1 delta^9)
Linoleate (18:2 delta^9,12)
,Linolenate (18:3 delta^ 9,12,15)
Arachidonate (20:4 delta^5,8,11,14)
The addition of a phosphate group adds: - CORRECT ANSWER - Charges to the molecule
and increases water solubility
What is the net charge at pH 7 of Phosphatidylcholine (PC) "Lechithin" remember CHOLINE -
CORRECT ANSWER -0
What is the net charge at pH 7 of Phosphatiethylanoamine (PE) remember ETHYLAMINE -
CORRECT ANSWER -0
What is the net charge at pH 7 of Phoaphtidylserine
remember SERINE - CORRECT ANSWER - -1
What is the net charge at pH 7 of phosphatidylglycerol
remember GLYCEROL - CORRECT ANSWER - -1
What is an enantiomer? - CORRECT ANSWER - Mirror image
What is a diasteriomer? - CORRECT ANSWER - Differ at some carbons but not others-
different chemical properties
What is an epimer? - CORRECT ANSWER - Differ at just one chiral carbon
Aldehyde + alcohol= - CORRECT ANSWER - Hemiacetal
Ketone + alcohol= - CORRECT ANSWER - Hemiketal
, Which carbons attach during the cyclization of glucose? - CORRECT ANSWER - C-5
reacts with carbonyl C to form a 6 membered ring. The carbonyl is the electrophile.
What type of reaction is a glycosidic bond? - CORRECT ANSWER - Condensation
The anomeric carbon will always be attached to ___ oxygens - CORRECT ANSWER -2
Maltose = glucose + glucose = - CORRECT ANSWER - Reducing sugar
Trehalose= Glucose + glucose= - CORRECT ANSWER - Non-reducing sugar
Lactose= Galactose + glucose= - CORRECT ANSWER - Reducing sugar
Sucrose=glucose + fructose - CORRECT ANSWER - non reducing sugar
Amino acids + peptide bonds = - CORRECT ANSWER - proteins
What is the sugar in RNA? - CORRECT ANSWER - D-Ribose
What is the sugar in DNA and how does it differ from RNA? - CORRECT ANSWER - D-
2Deoxyribose, the OH group at C2 is missing. It has already been reduced.
What are the pyrimidines (the smaller ones) - CORRECT ANSWER - Cytosine and
Thymine and Uracil
What are the purines (the bigger ones) - CORRECT ANSWER - Adenine and Guanine
What makes up a nucleoSIDE: - CORRECT ANSWER - Base+sugar
