Question 1

Which of the following statements about niacin is TRUE?

Accepted Answer

A) It can be synthesized in the body from the amino acid,tryptophan. 
B) Eggs are a good source of preformed niacin. 
C) Heat and light easily destroy it. 
D) Corn has a protective effect against niacin deficiencies. 
A) It can be synthesized in the body from the amino acid,tryptophan. 
B) Eggs are a good source of preformed niacin. 
C) Heat and light easily destroy it. 
D) Corn has a protective effect against niacin deficiencies.

Question 2

Which is not a aymptom of ariboflavinosis?

Accepted Answer

A) inflammation of the eyes and mouth. 
B) scaly,greasy skin eruptions. 
C) brittle hair. 
D) confusion. 
A) inflammation of the eyes and mouth. 
B) scaly,greasy skin eruptions. 
C) brittle hair. 
D) confusion.

Question 3

Which of the following foods is the best source of folate?

Accepted Answer

A) rice 
B) bacon 
C) oranges 
D) eggs 
A) rice 
B) bacon 
C) oranges 
D) eggs

Question 4

What are the implications of low urinary excretion of thiamin?

Accepted Answer

A) thiamin intake may be inadequate and available vitamin is being retained by the body 
B) thiamin intake is adequate 
C) thiamin is being consumed at levels approaching the UL 
D) thaimin is being rapidly recycled in the body 
A) thiamin intake may be inadequate and available vitamin is being retained by the body 
B) thiamin intake is adequate 
C) thiamin is being consumed at levels approaching the UL 
D) thaimin is being rapidly recycled in the body

Question 5

Which of the following is NOT recognized as a major function of vitamin C in the body?

Accepted Answer

A) formation of collagen 
B) facilitating release of energy from glucose 
C) protection against damage from free radicals 
D) improving the absorption of iron 
A) formation of collagen 
B) facilitating release of energy from glucose 
C) protection against damage from free radicals 
D) improving the absorption of iron

Question 6

Which of the following statements about the role of Vitamin B6 is FALSE?

Accepted Answer

A) It is vital in the formation of non-essential amino acids. 
B) It is required for the synthesis of hemoglobin. 
C) It is necessary in collagen formation. 
D) It supports the immune system since it is necessary for the formation of white blood cells. 
A) It is vital in the formation of non-essential amino acids. 
B) It is required for the synthesis of hemoglobin. 
C) It is necessary in collagen formation. 
D) It supports the immune system since it is necessary for the formation of white blood cells.

Question 7

What causes the following symptoms: diarrhea,nausea,and abdominal cramps?

Accepted Answer

A) excessive excretion of vitamin C in the urine 
B) unabsorbed vitamin C drawing water into the large intestine 
C) kidney stones 
D) low levels of vitamin C in the blood 
A) excessive excretion of vitamin C in the urine 
B) unabsorbed vitamin C drawing water into the large intestine 
C) kidney stones 
D) low levels of vitamin C in the blood

Question 8

Which of the following groups is at highest risk for developing a thiamin deficiency?

Accepted Answer

A) cigarette smokers 
B) endurance athletes 
C) older adults 
D) chronic alcoholics 
A) cigarette smokers 
B) endurance athletes 
C) older adults 
D) chronic alcoholics

Question 9

What is the relationship between folate and DNA synthesis?

Accepted Answer

A) Coenzyme forms of folate are required to transfer single carbons for the synthesis of bases incorporated into DNA. 
B) Coenzyme forms of folate are required to methylate DNA and influence gene expression. 
C) Coenzyme forms of folate function exclusively in the bone marrow where the synthesis of DNA takes place. 
D) Coenzyme forms of folate are required to methylate DNA so that the synthesis of bases can proceed. 
A) Coenzyme forms of folate are required to transfer single carbons for the synthesis of bases incorporated into DNA. 
B) Coenzyme forms of folate are required to methylate DNA and influence gene expression. 
C) Coenzyme forms of folate function exclusively in the bone marrow where the synthesis of DNA takes place. 
D) Coenzyme forms of folate are required to methylate DNA so that the synthesis of bases can proceed.

Question 10

Martin is 77 years old and was recently diagnosed with low levels of a vitamin in the blood.These low levels contribute to nerve damage and occurred despite the fact there were adequate levels of the vitamin in his diet.What is one explanation for this observation?

Accepted Answer

A) Martin has a deficiency of bile which is needed to absorb the vitamin. 
B) Martin has an autoimmune disease that reduces the levels of a specific protein that is needed to absorb the vitamin from the small intestine. 
C) Martin has atrophic gastritis that results in the excessive secretion of bicarbonate in the stomach. 
D) Martin has a deficiency of a fatty acid which binds to the vitamin so that it can be absorbed in the small intestine. 
A) Martin has a deficiency of bile which is needed to absorb the vitamin. 
B) Martin has an autoimmune disease that reduces the levels of a specific protein that is needed to absorb the vitamin from the small intestine. 
C) Martin has atrophic gastritis that results in the excessive secretion of bicarbonate in the stomach. 
D) Martin has a deficiency of a fatty acid which binds to the vitamin so that it can be absorbed in the small intestine.

Question 11

Which of the following groups is at risk for folate deficiency?

Accepted Answer

A) premature infants 
B) elderly 
C) smokers 
D) All of the above answer choices are correct. 
A) premature infants 
B) elderly 
C) smokers 
D) All of the above answer choices are correct.

Question 12

Which is an example of single carbon metabolism?

Accepted Answer

A) The transfer of a methyl group from cysteine to homocysteine with the simultaneous conversion of vitamin B12 to vitamin B6. 
B) The conversion of homocysteine to methionine,with the simultaneous conversion of methyl vitamin B12 to vitamin B12. 
C) The conversion of methyl folate to folate with the simultaneous conversion of methyl vitamin B12 to vitamin B12. 
D) The conversion of methyl folate to folate with the simultaneous conversion of vitamin B6 to methyl vitamin B6. 
A) The transfer of a methyl group from cysteine to homocysteine with the simultaneous conversion of vitamin B12 to vitamin B6. 
B) The conversion of homocysteine to methionine,with the simultaneous conversion of methyl vitamin B12 to vitamin B12. 
C) The conversion of methyl folate to folate with the simultaneous conversion of methyl vitamin B12 to vitamin B12. 
D) The conversion of methyl folate to folate with the simultaneous conversion of vitamin B6 to methyl vitamin B6.

Question 13

Jane is at a health foods store and is wondering whether or not to try a new vitamin supplement.She takes a bottle off the store shelf.What is the first thing she should look for to confirm the product has been authorized for sale in Canada?

Accepted Answer

A) the price Product of Canda declaration 
B) a Natural Products Number (NPN) 
C) the vitamin and mineral content 
D) the name of a Canadian manufacturer 
A) the price Product of Canda declaration 
B) a Natural Products Number (NPN) 
C) the vitamin and mineral content 
D) the name of a Canadian manufacturer

Question 14

Which organ excretes large intakes of vitamin C from the body?

Accepted Answer

A) kidneys. 
B) stomach. 
C) intestines. 
D) blood. 
A) kidneys. 
B) stomach. 
C) intestines. 
D) blood.

Question 15

Which situation is most likely to speed the onset of vitamin B6 deficiency?

Accepted Answer

A) a diet very high in protein and low in vitamin B6 
B) a diet low in both protein and vitamin B6 
C) the use of oral contraceptives 
D) intakes above the UL 
A) a diet very high in protein and low in vitamin B6 
B) a diet low in both protein and vitamin B6 
C) the use of oral contraceptives 
D) intakes above the UL

Question 16

Which is a good plant source of Vitamin B6?

Accepted Answer

A) Chicken 
B) Beef 
C) Lentils 
D) White bread 
A) Chicken 
B) Beef 
C) Lentils 
D) White bread

Question 17

Very high intakes of folate bypass the need for the reaction that requires vitamin B12.What is this reaction?

Accepted Answer

A) conversion of methyl folate to folate. 
B) conversion of folate to methyl folate. 
C) conversion of homocysteine to cysteine 
D) conversion of vitamin B6 to methyl-B6 
A) conversion of methyl folate to folate. 
B) conversion of folate to methyl folate. 
C) conversion of homocysteine to cysteine 
D) conversion of vitamin B6 to methyl-B6

Question 18

Which is NOT due to folate deficiency?

Accepted Answer

A) megaloblastic anemia. 
B) microcytic anemia. 
C) poor growth. 
D) impaired immune function, 
A) megaloblastic anemia. 
B) microcytic anemia. 
C) poor growth. 
D) impaired immune function,

Question 19

Which statement best describes the reactions involving vitamin B12,that along with folate and vitamin B6,keep levels of homocysteine in the blood low?

Accepted Answer

A) The conversion of homocysteine to methionine and the transfer of a single carbon to vitamin B12. 
B) The conversion of methionine to homocysteine and the transfer of a methyl group to vitamin B12. 
C) The conversion of homocysteine to cysteine and the transfer of a carboxyl group to vitamin B12. 
D) The conversion of homocysteine to methyl folate and the transfer of a carboxyl group to vitamin B12. 
A) The conversion of homocysteine to methionine and the transfer of a single carbon to vitamin B12. 
B) The conversion of methionine to homocysteine and the transfer of a methyl group to vitamin B12. 
C) The conversion of homocysteine to cysteine and the transfer of a carboxyl group to vitamin B12. 
D) The conversion of homocysteine to methyl folate and the transfer of a carboxyl group to vitamin B12.

Question 20

What is the criterion of adequacy used to determine the RDA for vitamin B12?

Accepted Answer

A) Normal neurological function 
B) Low urinary excretion of vitamin B12. 
C) Normal red blood cells 
D) High levels of intrinsic factor 
A) Normal neurological function 
B) Low urinary excretion of vitamin B12. 
C) Normal red blood cells 
D) High levels of intrinsic factor

Exam 8: A: the Water-Soluble Vitamins

Which of the following statements about niacin is TRUE?

Which is not a aymptom of ariboflavinosis?

Which of the following foods is the best source of folate?

What are the implications of low urinary excretion of thiamin?

Which of the following is NOT recognized as a major function of vitamin C in the body?

Which of the following statements about the role of Vitamin B6 is FALSE?

What causes the following symptoms: diarrhea,nausea,and abdominal cramps?

Which of the following groups is at highest risk for developing a thiamin deficiency?

What is the relationship between folate and DNA synthesis?

Martin is 77 years old and was recently diagnosed with low levels of a vitamin in the blood.These low levels contribute to nerve damage and occurred despite the fact there were adequate levels of the vitamin in his diet.What is one explanation for this observation?

Which of the following groups is at risk for folate deficiency?

Which is an example of single carbon metabolism?

Jane is at a health foods store and is wondering whether or not to try a new vitamin supplement.She takes a bottle off the store shelf.What is the first thing she should look for to confirm the product has been authorized for sale in Canada?

Which organ excretes large intakes of vitamin C from the body?

Which situation is most likely to speed the onset of vitamin B6 deficiency?

Which is a good plant source of Vitamin B6?

Very high intakes of folate bypass the need for the reaction that requires vitamin B12.What is this reaction?

Which is NOT due to folate deficiency?

Which statement best describes the reactions involving vitamin B12,that along with folate and vitamin B6,keep levels of homocysteine in the blood low?

What is the criterion of adequacy used to determine the RDA for vitamin B12?

Nutrition: Food for Health

Nutrition Guidelines: Applying the Science of Nutrition

Digestion, Absorption, and Metabolism

Carbohydrates: Sugars, Starches, and Fibre

Lipids

Proteins and Amino Acids

Energy Balance and Weight Management

The Fat-Soluble Vitamins

Water and the Electrolytes

Major Minerals and Bone Health

The Trace Elements

Nutrition and Physical Activity

Nutrition During Pregnancy and Lactation

Nutrition From Infancy to Adolescence

Nutrition and Aging: the Adult Years

Food Safety

World Hunger and Malnutrition

Focus 1: Focus on Beyond the Basics

Focus 2: Focus on Alcohol

Focus 3: Focus on Obesity, Metabolism, and Disease Risk

Focus 4: Focus on Phytochemicals

Focus5:focus on Natural Health Products

Focus 6: Focus on Integrating Nutrient Function in the Body

Focus 7: Focus on Eating Disorders

Focus 8: Focus on Biotechnology

Filters

Which of the following statements about the role of Vitamin B₆ is FALSE?