NUSC 1165 Nutrition Chapter 5 Exam
Questions And Answers.
What are lipids? - Answer -fats (solid at room temp)
-Concentrated source of energy
9 kcal/g
-in food contributes to texture, flavor and aroma
- in body provides stored energy, protects our
organs
What are the types of lipids? - Answer -Fatty acids
-glycerides
-phospholipids
-sterols
What are fatty acids? - Answer -A chain of C atoms with an acid and a methyl (omega end)
group on either end
-Usually bound to glycerol (not a lot of free fatty acids)
-Categorized by the number of carbons in the chain (chain length) and location and type or
position of double bonds
Fatty acids - Answer -when looking for acid- look for oxygen in COOH
-omega groups- different kinds of carbons
-Fatty acid chain (4-24 carbons in length)
16:0 - palmitic acid
18:0- stearic acid
18:1- linoleic acis
18:2- linolenic acid
20:0
number of carbons : double bonds
-saturated- fully saturated fat- no double bonds
, polyunsaturated- more than two c=c
-level of unsaturation important for function
Fatty Acids: Chain Length - Answer -Short chain fatty acids (4-7)
-Medium chain fatty acids (8-12)
-Long chain fatty acids (>12)
- Long chain fatty acids- Found in meats, fish,
vegetable oils
- Medium chain fatty acids Found in coconut oil
- Short chain fatty acids Found in dairy fats/colon
- Most fats in foods and in humans are between 14
and 22 carbons
-longer the c chain, the more insoluble in water
Fatty Acids: Types of Bonds - Answer -Saturated fatty acids
-carbon chain is saturated with hydrogen bonds
-( fill possible number of H for c)
- Every available carbon (C) bond has a
hydrogen (H) atom attached to it.
-Saturated fats tend to be solid at room T
-straight chain, most favorable orientatio
crystalline structure (rigid)
-Most common (palmitic acid and stearic acid)
-Vegetable sources - palm oil, palm kernel oil,
coconut oil (tropical oils)
--Unsaturated fatty acids
- contains one or more double bonds between
the carbons
- Liquid at room temperature (melt at cooler
temperatures)
Questions And Answers.
What are lipids? - Answer -fats (solid at room temp)
-Concentrated source of energy
9 kcal/g
-in food contributes to texture, flavor and aroma
- in body provides stored energy, protects our
organs
What are the types of lipids? - Answer -Fatty acids
-glycerides
-phospholipids
-sterols
What are fatty acids? - Answer -A chain of C atoms with an acid and a methyl (omega end)
group on either end
-Usually bound to glycerol (not a lot of free fatty acids)
-Categorized by the number of carbons in the chain (chain length) and location and type or
position of double bonds
Fatty acids - Answer -when looking for acid- look for oxygen in COOH
-omega groups- different kinds of carbons
-Fatty acid chain (4-24 carbons in length)
16:0 - palmitic acid
18:0- stearic acid
18:1- linoleic acis
18:2- linolenic acid
20:0
number of carbons : double bonds
-saturated- fully saturated fat- no double bonds
, polyunsaturated- more than two c=c
-level of unsaturation important for function
Fatty Acids: Chain Length - Answer -Short chain fatty acids (4-7)
-Medium chain fatty acids (8-12)
-Long chain fatty acids (>12)
- Long chain fatty acids- Found in meats, fish,
vegetable oils
- Medium chain fatty acids Found in coconut oil
- Short chain fatty acids Found in dairy fats/colon
- Most fats in foods and in humans are between 14
and 22 carbons
-longer the c chain, the more insoluble in water
Fatty Acids: Types of Bonds - Answer -Saturated fatty acids
-carbon chain is saturated with hydrogen bonds
-( fill possible number of H for c)
- Every available carbon (C) bond has a
hydrogen (H) atom attached to it.
-Saturated fats tend to be solid at room T
-straight chain, most favorable orientatio
crystalline structure (rigid)
-Most common (palmitic acid and stearic acid)
-Vegetable sources - palm oil, palm kernel oil,
coconut oil (tropical oils)
--Unsaturated fatty acids
- contains one or more double bonds between
the carbons
- Liquid at room temperature (melt at cooler
temperatures)
