DIT 121 - Exam 2 Questions With Correct
Answers
What are the 3 main classes of lipids? - CORRECT ANSWER✔✔-
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triglycerides: the most common type of lipid in food and the body
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phospholipids: for example, in cell membranes | | | | |
sterols: include cholesterol, vitamin D, some hormones.
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what is the main form of fat in the diet and the major storage form of
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fat in the body? - CORRECT ANSWER✔✔-triglycerides
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what 2 types of molecules (and how many of each) join together to
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forma triglyceride? - CORRECT ANSWER✔✔-glycerol + 3 fatty acids
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explain what is meant by saturated, monounsaturated, and
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polyunsaturated when referring to fatty acids. - CORRECT ANSWER✔✔-
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monounsaturated: fatty acids have 1 double bond between carbons | | | | | | | |
polyunsaturated: fatty acids have 2 or more double bonds between
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carbons
saturated: no double bonds | | |
, omega-3 fatty acids - CORRECT ANSWER✔✔-have the 1st double bond
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after the 3rd carbon, counting from the methyl (CH3) group
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omega-6 fatty acid - CORRECT ANSWER✔✔-have the 1st double bond
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after 6th carbon, counting from the methyl group
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which type of fatty acids (saturated or unsaturated) tend to make fats
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solid at room temperature? - CORRECT ANSWER✔✔-saturated:
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saturated with hydrogens | |
unsaturated: not saturated with hydrogen, can hold more hydrogen
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which types of fatty acids (saturated/unsaturated) tend to make fats
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liquid soft at room temperature - CORRECT ANSWER✔✔-saturated fatty
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acids stack together, make fats solid at room temperature: animal fat,
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bacon grease, lard, chicken fat, butter
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unsaturated fatty acids: dont stack neatly, making fats soft or liquid at
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room temperature: avocado, fatty fish, nuts and seeds, olives, vegetable
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oils.
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what is hydrogenation, and why is this done to the oils in processed
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foods? - CORRECT ANSWER✔✔-hydrogenation produces trans-fatty
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acids; "trans-fat" are oils to which H atoms have been added.
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Answers
What are the 3 main classes of lipids? - CORRECT ANSWER✔✔-
| | | | | | | | | |
triglycerides: the most common type of lipid in food and the body
| | | | | | | | | | |
phospholipids: for example, in cell membranes | | | | |
sterols: include cholesterol, vitamin D, some hormones.
| | | | | |
what is the main form of fat in the diet and the major storage form of
| | | | | | | | | | | | | | | |
fat in the body? - CORRECT ANSWER✔✔-triglycerides
| | | | | |
what 2 types of molecules (and how many of each) join together to
| | | | | | | | | | | | |
forma triglyceride? - CORRECT ANSWER✔✔-glycerol + 3 fatty acids
| | | | | | | |
explain what is meant by saturated, monounsaturated, and
| | | | | | | |
polyunsaturated when referring to fatty acids. - CORRECT ANSWER✔✔-
| | | | | | | |
monounsaturated: fatty acids have 1 double bond between carbons | | | | | | | |
polyunsaturated: fatty acids have 2 or more double bonds between
| | | | | | | | | |
carbons
saturated: no double bonds | | |
, omega-3 fatty acids - CORRECT ANSWER✔✔-have the 1st double bond
| | | | | | | | | |
after the 3rd carbon, counting from the methyl (CH3) group
| | | | | | | | |
omega-6 fatty acid - CORRECT ANSWER✔✔-have the 1st double bond
| | | | | | | | | |
after 6th carbon, counting from the methyl group
| | | | | | |
which type of fatty acids (saturated or unsaturated) tend to make fats
| | | | | | | | | | | |
solid at room temperature? - CORRECT ANSWER✔✔-saturated:
| | | | | | |
saturated with hydrogens | |
unsaturated: not saturated with hydrogen, can hold more hydrogen
| | | | | | | |
which types of fatty acids (saturated/unsaturated) tend to make fats
| | | | | | | | | |
liquid soft at room temperature - CORRECT ANSWER✔✔-saturated fatty
| | | | | | | | |
acids stack together, make fats solid at room temperature: animal fat,
| | | | | | | | | | |
bacon grease, lard, chicken fat, butter
| | | | |
unsaturated fatty acids: dont stack neatly, making fats soft or liquid at
| | | | | | | | | | | |
room temperature: avocado, fatty fish, nuts and seeds, olives, vegetable
| | | | | | | | |
oils.
|
what is hydrogenation, and why is this done to the oils in processed
| | | | | | | | | | | | |
foods? - CORRECT ANSWER✔✔-hydrogenation produces trans-fatty
| | | | | |
acids; "trans-fat" are oils to which H atoms have been added.
| | | | | | | | | |
