MCB Exam #2 questions with answers
What are the parts of a triglycerol - ANSWERS Glycerol + 3 fatty acids
Why are fatty acids called "acids" - ANSWERS Because one end has a carboxyl group
What links the glycerol to the fatty acids - ANSWERS An ester linkage
What is a saturated fatty acid - ...
What are the parts of a triglycerol - ANSWERS Glycerol + 3 fatty acids
Why are fatty acids called "acids" - ANSWERS Because one end has a carboxyl group
What links the glycerol to the fatty acids - ANSWERS An ester linkage
What is a saturated fatty acid - ANSWERS Consists of all single bonds between carbons
What is an unsaturated fatty acid - ANSWERS Has at least one multiple bond between carbons
What does monounsaturated mean - ANSWERS Only one double bond
What does polyunsaturated mean - ANSWERS More than one double bond
Which type of lipid is liquid at room temperature - ANSWERS Unsaturated fats (oils)
Which type of lipid is solid at room temperature - ANSWERS Saturated fats
What is the process called that turns multiple bonds into single bonds (unsaturated --->
saturated fatty acid) - ANSWERS hydrogenation
Are lipids polar or nonpolar - ANSWERS Nonpolar
, Functions of lipids - ANSWERS Long term energy storage (2x energy by weight of carbs),
cushioning for organs, and insulation
Do lipids perform a structural function - ANSWERS No
Three parts of an amino acid - ANSWERS Amine group, R-group, and carboxyl group (all
connected to central carbon)
What is special about the amino acid methionine - ANSWERS Is the first amino acid in the
primary structure for every polypeptide/protein
How many amino acids are there - ANSWERS 20
How many amino acids do humans "need" - ANSWERS 9
Which is the polymer/monomer for proteins - ANSWERS Monomer: amino acids
Polymer: protein
What differentiates the different amino acids - ANSWERS Their R-group
Three different kinds of R-groups - ANSWERS 1. Polar uncharged
2. Charged
3. Nonpolar (includes aromatics)
Which R-groups are hydrophilic - ANSWERS Polar uncharged and charged
Which R-groups are hydrophobic - ANSWERS Just the nonpolar ones
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