Nutrition and Health Exam 2 ACTUAL
QUESTIONS AND CORRECT ANSWERS
What are the four key players of Lipids? - Correct answers✔✔Fatty Acids
Sterols
Phospholipids
Triglyceride
What chemical unit is located at the alpha end of a fatty acid? - Correct answers✔✔Carboxylic
Acid Group
Structure of fatty acid - Correct answers✔✔methyl (omega) end
carboxylic (alpha) end
How many carbons are in a short-chain fatty acid? - Correct answers✔✔less than 8 carbons
How many carbons are in a medium-chain fatty acid? - Correct answers✔✔8-12 carbons
How many carbons are in a long-chain fatty acid? - Correct answers✔✔more than 12 carbons
Long-chain fatty acids are more soluble in water and have lower melting points than short-chain
fatty acids - Correct answers✔✔False
Short-chain fatty acid - Correct answers✔✔Low melting point and relatively soluble in water
,long-chain fatty acid - Correct answers✔✔high melting point and relatively insoluble in water
Polyunsaturated fatty acids have lower melting points than saturated fatty acids. - Correct
answers✔✔True
Saturated fatty acids - Correct answers✔✔Fatty acids with no double bonds and high melting
points (typically solid)
Monounsaturated fatty acids - Correct answers✔✔One double bond; liquid at room temperature.
Polyunsaturated fatty acids - Correct answers✔✔Two or more double bonds; liquid at room
temperature. (low melting point)
Diagram of saturated and unsaturated fatty acids - Correct answers✔✔Saturated stacks neatly,
while unsaturated are kinked
Cis fatty acid - Correct answers✔✔Hydrogens on the same side of the fatty acid backbone
Trans fatty acid - Correct answers✔✔hydrogens are on opposite sides of the fatty acid backbone
A fatty acid has one carbon-carbon double bond, and the hydrogens attached to the carbons are
on opposite sides of the molecule. Which of the following is a correct description of this fatty
acid?
a. Monounsaturated and cis
b. Monounsaturated and trans
c. Polyunsaturated and cis
, d. Polyunsaturated and trans - Correct answers✔✔b. Monounsaturated and trans
A fatty acid has the following alpha designation: cis9,cis12-18:2.
How many total carbons does this fatty acid have? - Correct answers✔✔18
Omega designation - Correct answers✔✔omega-6 (6 carbons from omega end)
Alpha designation - Correct answers✔✔cis9, cis12-18:2
cis9, cis12 = Formation and location of double bonds
18 = # of carbons
2 = # of bonds
Beef is a food that has a high amount of saturated fat. In fact, the fat in beef is made up entirely
of saturated fat. - Correct answers✔✔False
Linoleic Acid - Correct answers✔✔An essential polyunsaturated fatty acid of the omega-6
family, with two double bonds, promotes inflammation
Linolenic Acid - Correct answers✔✔An essential polyunsaturated fatty acid of the omega-3
family, with three double bonds, reduces inflammation
Which of the following are essential fatty acids?
a. Linoleic acid
b. Linolenic acid
c. Lauric acid
d. All of the above
QUESTIONS AND CORRECT ANSWERS
What are the four key players of Lipids? - Correct answers✔✔Fatty Acids
Sterols
Phospholipids
Triglyceride
What chemical unit is located at the alpha end of a fatty acid? - Correct answers✔✔Carboxylic
Acid Group
Structure of fatty acid - Correct answers✔✔methyl (omega) end
carboxylic (alpha) end
How many carbons are in a short-chain fatty acid? - Correct answers✔✔less than 8 carbons
How many carbons are in a medium-chain fatty acid? - Correct answers✔✔8-12 carbons
How many carbons are in a long-chain fatty acid? - Correct answers✔✔more than 12 carbons
Long-chain fatty acids are more soluble in water and have lower melting points than short-chain
fatty acids - Correct answers✔✔False
Short-chain fatty acid - Correct answers✔✔Low melting point and relatively soluble in water
,long-chain fatty acid - Correct answers✔✔high melting point and relatively insoluble in water
Polyunsaturated fatty acids have lower melting points than saturated fatty acids. - Correct
answers✔✔True
Saturated fatty acids - Correct answers✔✔Fatty acids with no double bonds and high melting
points (typically solid)
Monounsaturated fatty acids - Correct answers✔✔One double bond; liquid at room temperature.
Polyunsaturated fatty acids - Correct answers✔✔Two or more double bonds; liquid at room
temperature. (low melting point)
Diagram of saturated and unsaturated fatty acids - Correct answers✔✔Saturated stacks neatly,
while unsaturated are kinked
Cis fatty acid - Correct answers✔✔Hydrogens on the same side of the fatty acid backbone
Trans fatty acid - Correct answers✔✔hydrogens are on opposite sides of the fatty acid backbone
A fatty acid has one carbon-carbon double bond, and the hydrogens attached to the carbons are
on opposite sides of the molecule. Which of the following is a correct description of this fatty
acid?
a. Monounsaturated and cis
b. Monounsaturated and trans
c. Polyunsaturated and cis
, d. Polyunsaturated and trans - Correct answers✔✔b. Monounsaturated and trans
A fatty acid has the following alpha designation: cis9,cis12-18:2.
How many total carbons does this fatty acid have? - Correct answers✔✔18
Omega designation - Correct answers✔✔omega-6 (6 carbons from omega end)
Alpha designation - Correct answers✔✔cis9, cis12-18:2
cis9, cis12 = Formation and location of double bonds
18 = # of carbons
2 = # of bonds
Beef is a food that has a high amount of saturated fat. In fact, the fat in beef is made up entirely
of saturated fat. - Correct answers✔✔False
Linoleic Acid - Correct answers✔✔An essential polyunsaturated fatty acid of the omega-6
family, with two double bonds, promotes inflammation
Linolenic Acid - Correct answers✔✔An essential polyunsaturated fatty acid of the omega-3
family, with three double bonds, reduces inflammation
Which of the following are essential fatty acids?
a. Linoleic acid
b. Linolenic acid
c. Lauric acid
d. All of the above
