BCHM2300 Test II March 10, 2011
BCHM 2300 Test II - Lipids and Proteins – March 15, 2011
Each question has only one proper answer.
Mark your answers on provided answer sheet using pencil only.
Proper answers are bold and underline marked.
1. Which type of fatty acid has two or more double bonds?
A) saturated
B) di-saturated
C) monounsaturated
D) polyunsaturated
2. Trans fatty acids are associated with
A) increasing blood cholesterol level
B) decreasing blood cholesterol level
C) increasing blood carbon levels
D) decreasing blood carbon levels
3. Which fatty acids are the most common in seeds, nuts and vegetable oils?
A) omega-3
B) omega-6
C) omega-9
D) omega-12
4. Dietary fat in the small intestine ________ cholesterol absorption.
A) decreases
B) increases
C) has no effect on
D) prevents
5. Which lipoprotein has the highest percentage of fat?
A) very low density lipoprotein
B) low-density lipoprotein
C) intermediate-density lipoprotein
D) high-density lipoprotein
6. Omega-3 fatty acids are
A) a form of trans fatty acids
B) metabolized in the body to arachidonic acid
C) synthesized in the liver and small intestine
D) found in leafy green vegetables, flaxseeds, soy milk, and fish
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BCHM2300 Test II March 10, 2011
7. The Heart Healthy Diet recommends less than______________ mg of cholesterol per
day to decrease the risk for developing heart disease.
A) 200
B) 2400
C) 300
D) 220
8. The most common category of lipids are
A) sterols
B) phospholipids
C) triglycerides
D) monoglycerides
9. Which of the following is not a function of lipids?
A) insulate and protect vital organs
B) provide energy reserves
C) maintain body weight
D) carry fat-soluble vitamins
10. True or false? Essential fatty acids are precursors to hormone-like substances called
eicosanoids.
A) True
B) False
11. True or false? All fatty acids in food and in the body exist only as triglyceride
molecules.
A) True
B) False
12. True or false? Phospholipids are soluble in both fat and water.
A) True
B) False
13. True or false? Short-chain fatty acids are less soluble in water than long chain.
A) True
B) False
14. True or false? Flaxseed oil is high in alpha-linolenic acid, an essential omega-3 fatty
acid.
A) True
B) False
15. True or false? People with elevated HDL levels appear to have an increased risk of heart
disease and stroke.
A) True
B) False
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BCHM2300 Test II March 10, 2011
16. True or false? High HDL level indicates a healthier cholesterol factor than a high LDL
level.
A) True
B) False
17. True or false? Cardiovascular diseases are a leading cause of death in Canada.
A) True
B) False
18. True or false? A process called partial hydrogenation creates less trans fatty acids.
A) True
B) False
19. True or false? We store excess of dietary calories as body fat to get us through periods
of energy deficit.
A) True
B) False
20. True or false? Commodity vegetable oils are not processed and refined foods.
A) True
B) False
21. True and False? Oils containing high levels of omega-6 fatty acids affect positively our
health.
A) True
B) False
22. True and False? From the nutritional point of view olive oil is the best vegetable oil due
to sizable amount of omega-3 fatty acids.
A) True
B) False
23. True and False? One of the main nutritional problems related to animal fats is the high
content of monounsaturated fat.
A) True
B) False
24. True or false? The enzymes in small intestine break triglycerides into glycerol and fatty
acids only.
A) True
B) False
25. Fats in chylomicrons are taken up in small intestine cells with the help of
A) lipoprotein lipase
B) micelles
C) sterols
D) pancreatic enzymes
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BCHM2300 Test II March 10, 2011
26. Animal origin fats are rich in
A) Trans fatty acids
B) Omega - 3 acids
C) Monounsaturated fatty acids
D) Saturated fatty acids
27. True or False? Triglycerides are the same as fatty acids.
A) True
B) False
28. True and False? Fried foods are the main source of trans fatty acids in our diet.
A) True
B) False
29. The best sources of EPA and DHA in the diet are
A) Large animal fats
B) Fish fat
C) Specific vegetable oils
D) Canola and olive oils
30. True and False? Phytosterols present in a diet are lowering absorption of cholesterol.
A) True
B) False
31. True and False? It is a relationship between cholesterol level in our diet and some
vitamins formation in our body.
A) True
B) False
32. True or False? Chylomicron is the most tightly packed and one of the smallest
lipoprotein.
A) True
B) False
33. True or False? All lipids are transported in our body directly by the blood from small
intestine to liver through portal vein.
A) True
B) False
34. Select from the list a food which will lower the risk of heart diseases?
A) Milk products
B) Saturated fatty acids
C) Processed foods
D) Fish oils
35. True and False? Pork meat, lighter in colour, contains more fat than beef meat.
A) True
B) False
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BCHM2300 Test II March 10, 2011
36. True and False? Arachidonic acid is the best metabolite formed in the omega-3 fatty
acids pathway.
A) True
B) False
37. Fish as source of good fatty acids helps with exception of:
A) Reducing blood cholesterol
B) Regulate heart beats
C) Increasing risk of inflammation
D) Affecting blood pressure
38. True or False? Lecithin is a lipid found in egg whites that assists transportation of bile in
large intestine.
A) True
B) False
39. True or False? The main fatty acids in our diet contain 18 carbon atoms.
A) True
B) False
40. True or False? Omega-6 fatty acids have the first double bond placed on the sixth
carbon atom counted from the carboxyl group end.
A) True
B) False
41. True or False? Only omega-3 fatty acids are essential for our body.
A) True
B) False
42. True or False? Our diet is offering proper amounts of omega-6 fatty acids, because
polyunsaturated fatty acids are the main component of foods.
A) True
B) False
43. True and False? Fat containing the highest amount of polyunsaturated fatty acids is
always nutritionally the best.
A) True
B) False
44. Which of the following is a characteristic of vitamin E?
A) It enhances absorption of iron
B) It can be manufactured from beta-carotene
C) It is involved in lipids absorption
D) It is a critical component of body antioxidants
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BCHM2300 Test II March 10, 2011
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45.
Tropical oils such as palm and coconut oil are nutritionally disadvantaged because they
contain
A. High amounts of tocopherols
B. Proper contribution from PUFA
C. High amounts of saturated fats
D. High amounts of liquid components
46.
Soybean, corn and sunflower oils contain high amounts of
A. Omega-3 fatty acids
B. Saturated fats
C. Omega-6 fatty acids
D. MUFA
47.
Proper ratio of omega-3 to omega-6 fatty acids is defined by
A. Proportion of these fatty acids in foods
B. Needs of fatty acids metabolism and formation of specific metabolites
C. Deficiency in our ability to transform these fatty acids to saturated form
D. Availability of antioxidants to control their reduction to Acetyl CoA
48.
Digestion of lipids starts in
A. Esophagus
B. Mouth
C. Stomach
D. Large intestine
49.
Select a fat/oil which will provide nutritionally important amounts of polyunsaturated fatty
acids
A. Shortening
B. Butter
C. Soybean
D. Flaxseed oil
50. Which of the following processes will not denaturalize a polypeptide molecule?
A) cold temperatures
B) changes in acidity
C) changes in alkalinity
D) oxidation
51. Polypeptides contain
A) two amino acids joined by peptide bonds
B) four amino acids joined by peptide bonds
C) five to ten amino acids joined by peptide bonds
D) more than ten amino acids joined by peptide bonds
BCHM2300 Test II March 10, 2011
52. Proteins that speed up metabolic reactions without being used up or destroyed in the
process are called
A) amino acids
B) enzymes
C) cofactors
D) pro-enzymes
53. Fluid found inside the cells is called
A) intracellular
B) extracellular
C) intercellular
D) interstitial
54. Once absorbed, amino acids travel from the small intestine via the portal vein to the
A) pancreas
B) kidneys
C) liver
D) gallbladder
55. Which disease prevents individuals from digestion of gluten found in wheat, rye, and
oats?
A) kwashiorkor
B) celiac
C) marasmus
D) colic
56. Who of the following individual should have the highest amounts of protein per body
weight unit in his or her diet?
A) adult
B) teenager
C) infant
D) elderly person
57. Which of the following foods is the worst source of protein?
A) soy burger
B) chicken
C) kidney beans
D) milk
58. Excess consumption of animal protein can cause
A) loss of vitamin C
B) kwashiorkor
C) loss of calcium
D) marasmus
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BCHM2300 Test II March 10, 2011
59. The constant recycling of protein in the body is known as
A) protein turnover
B) cystic fibrosis
C) deamination
D) malnutrition
60. True or False? If both nutrients are provided in diet, the body will utilize proteins prior
to carbohydrates as a source of energy.
A) True
B) False
61. True or False? The body typically produces nine essential amino acids.
A) True
B) False
62. True or False? Proteins play a major role in the immune system.
A) True
B) False
63. True or False? Taking protein supplements or eating high-protein diet is only the
effective way to lose fat and gain muscle mass.
A) True
B) False
64. True or False? Kidney beans are considered to be a source of complete and high quality
protein.
A) True
B) False
65. True or False? Diets high in animal proteins are increasing risk of heart diseases.
A) True
B) False
66. True or False? The majority of protein digestion occurs in the stomach.
A) True
B) False
67. True or False? Proteins not digested in the small intestine travel to the large intestine,
where they are further digested and absorbed by our body.
A) True
B) False
68. True or False? Excess of protein consumption may cause dehydration and strain to the
kidney function.
A) True
B) False
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BCHM2300 Test II March 10, 2011
69. True or False? Proteases are specific enzymes dismantling only oligopeptides in
microvilli wall.
A) True
B) False
70. Function of protein in the body is defined by
A) Number of essential amino acids in it
B) Formation of inter chain bonds
C) Order of amino acids in oligopeptides
D) Formation of tertiary and quaternary structure
71. Which of the following is not a function of proteins in human body
A) Denaturation
B) Being the main component of muscles
C) Protecting body from invaders
D) Forming the bone structure
72. True or False? Complimentary proteins require specific amounts of specific essential
amino acids.
A) True
B) False
73. Which is the best source of proteins in our diet?
A) Legumes
B) Soybean
C) Animal origin products
D) Only dairy products
74. True or False? Amino acid and protein supplements need to be consumed only by
young people.
A) True
B) False
75. Select type of vegetarian diet where consumption of eggs is not allowed
A) Lacto-ovo-vegetarian
B) Omnivores
C) Lactovegetarian
D) All eating
76. True or False? Function of proteins is affected by the order of amino acids in
polypeptides.
A) True
B) False
77. True or False? Shape of all proteins produced in the body is affected by amino acids
available in the liver storage.
A) True
B) False
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BCHM2300 Test II March 10, 2011
78. True or False? Absorption of amino acids in GI tract is controlled by the sequence of
amino acids in food proteins.
A) True
B) False
79. Which of the following enzyme digest oligopeptides in small intestine?
A) Trypsinogen
B) Aminopeptidases
C) Tripeptidases
D) Capillaries
80. Nutritional quality of the proteins is defined by
A) The presence of specific amino acids
B) The sequence of amino acids in protein
C) Bioavailability and presence of essential amino acids
D) The amount of protein in foods
81. The most of food allergens are related to the following food component
A) Lipids
B) Phytochemicals
C) Food additives
D) Proteins
82. Which of the following is not a protein function?
A) Source of glucose
B) Immunization
C) Neurotransmitters
D) Source of lipids
83. Overload of proteins and protein supplements in our diet causing the following problems
A) Marasmus
B) Stopping liver and kidney function
C) Extensive melamine formation
D) Extensive deamination and urea formation
84. Overload with dietary protein may cause the following problems to human body
A) Deficiency of amino acid carriers
B) Forcing body to use amino acids for production of functional proteins
C) Affecting positively function of liver
D) Lack of specific enzymes to digest proteinous material
85. From which part of human body amino acids will be used first when the deficiency of
protein occurs
A) Liver pool of amino acids
B) Body fluids
C) Immune system
D) Bones
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