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Biochem - Vitamins

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biochem Quiz on Biochem - Vitamins, created by Alannah McDonnell on 10/03/2018.
Alannah McDonnell
Quiz by Alannah McDonnell, updated more than 1 year ago
Alannah McDonnell
Created by Alannah McDonnell about 6 years ago
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Resource summary

Question 1

Question
Which of these vitamins are fat soluble?
Answer
  • A
  • D
  • E
  • K
  • B
  • C

Question 2

Question
Where are vitamins absorbed in the digestive tract?
Answer
  • 100% in liver
  • 40 - 90 % in the small intestine
  • 40-50% in stomach
  • 10% in mouth
  • 5% in pancreas

Question 3

Question
Function of liver in absorbing vitamins?
Answer
  • Bile produced here improves motility
  • bile produced here helps to absorb water soluble vitamins
  • bile produced here helps to absorb fat soluble vitamins
  • bile releases vitamins from food

Question 4

Question
Where does some niacin absorption occur?
Answer
  • stomach
  • mouth
  • liver
  • pancreas

Question 5

Question
What is absorbed in the small intestine?
Answer
  • Water soluble vitamins
  • fat soluble vitamins

Question 6

Question
How are water soluble vitamins absorbed in the small intestine
Answer
  • simple diffusion
  • facilitated diffusion
  • active transport
  • absorbed from micelles along with dietary fat

Question 7

Question
How are fat soluble vitamins absorbed in the small intestine?
Answer
  • simple diffusion
  • facilitated diffusion
  • active transport
  • from micelles along with dietary fat

Question 8

Question
Where is vitamin C absorbed?
Answer
  • in large intestine
  • stomach
  • pancreas
  • in ileum
  • liver

Question 9

Question
what does chewing do?
Answer
  • break apart fiber
  • break down fat
  • release vitamins
  • release enzymes
  • absorb carbohydrates

Question 10

Question
where is vitamin B12 absorbed?
Answer
  • ileum
  • stomach
  • large intestine
  • liver
  • pancreas

Question 11

Question
what is absorbed in the large intestine?
Answer
  • small amounts of vitamin K
  • large amounts of vitamin K
  • small amounts of biotin
  • large amounts of biotin
  • small amounts of pantothenic acid
  • large amounts of pantothenic acid
  • small amounts of vitamin B6
  • large amounts of vitamin B6

Question 12

Question
what is released by the pancreas?
Answer
  • pantothenic acid
  • vitamin C
  • digestive enzymes
  • bile
  • HCl Acid

Question 13

Question
Bioavailability refers to the amount of a nutrient that can be absorbed an utilized in the body
Answer
  • True
  • False

Question 14

Question
What affects bioavailability of vitamins?
Answer
  • solubility
  • energy requiring transport system
  • carrier proteins
  • concentration gradient
  • other vitamins

Question 15

Question
Which vitamins are all co enzymes
Answer
  • A
  • E
  • D
  • K
  • B
  • C

Question 16

Question
What do vitamins do?
Answer
  • promote body activities
  • regulate body activities
  • enhance body secretions
  • inhibit body secretions

Question 17

Question
What vitamins are stored in the body?
Answer
  • most water soluble vitamins
  • B12
  • fat soluble vitamins
  • B6

Question 18

Question
Where are fat soluble vitamins stored?
Answer
  • Liver
  • Fatty tissues
  • Urine
  • Stomach
  • Large intestine

Question 19

Question
What is the active form of thiamin in the body?
Answer
  • Thiamin pyrophosphate
  • Thiamine
  • Thyrophosphate
  • Vitamin B6

Question 20

Question
Function of thiamin in the body?
Answer
  • Essential to the energy-producing reactions
  • Exes tail to energy-using reactions
  • Essential to Breakdown of large molecules
  • Essential to build up of large molecules

Question 21

Question
Active forms of riboflavin in the body?
Answer
  • Flavin adenine dinucleotide
  • Flavin mononucleotide
  • Flavin adenosine dineutralise
  • Flactin monosaccharide

Question 22

Question
Active forms of niacin in the body?
Answer
  • Nicotinamide adenine dinucleotide
  • Nicotinamide adenine dinucleotide phosphate
  • Nicotin amide dinucleotide phosphur
  • Nicotine amide dinucleotide

Question 23

Question
what are folate and folacin?
Answer
  • General terms for compounds that have chemical structures and nutritional properties similar to those of folic acid
  • Folic acid
  • Substrates similar to folatemin
  • Bases

Question 24

Question
Active form of B6 in the body?
Answer
  • Pyridoxal phosphate
  • Phosphate pyridoxal
  • Pyrimidal phosphur
  • Phosphur pyrimidal

Question 25

Question
Symptoms of folate deficiency
Answer
  • Poor growth
  • Rapid growth
  • Problems in Nerve development
  • Problems in Nerve function
  • Diarrhea
  • Constipation

Question 26

Question
Some causes of neural tube defects?
Answer
  • Low folate levels
  • High folate levels
  • Genetic predisposition
  • Age

Question 27

Question
Spina bifida and anencephaly are two forms of neural tube defects
Answer
  • True
  • False

Question 28

Question
What increases blood homocysteine levels?
Answer
  • Low intake of folate
  • High intake of folate
  • Low intake of thiamin
  • High intake fo thiamin

Question 29

Question
What may mask the early symptoms of a vitamin B12 deficiency?
Answer
  • A high intake of folate
  • A low intake of folate
  • A high intake of thiamin
  • A low intake of thiamin

Question 30

Question
UL of folate?
Answer
  • 1000 micrograms per day
  • 1000 grams per day
  • 1000 milligrams per day
  • 10 grams

Question 31

Question
What is necessary for the maintenance of myelin?
Answer
  • Vitamin B12
  • Vitamin C
  • Vitamin D
  • Vitamin B6
  • Vitamin A

Question 32

Question
Which of these is not required for special handling of vitamin B12 in the digestive tract?
Answer
  • Stomach acid
  • Enzymes
  • Intrinsic factor
  • Myelin

Question 33

Question
What is important for the metabolism of odd-numbered fatty acids and methionine?
Answer
  • Active form of vitamin B12
  • Active form of vitamin B6
  • Active form of vitamin C
  • Active form of vitamin D

Question 34

Question
What is the active form of vitamin B12?
Answer
  • Vitamin B 6
  • Cobalmin coenzymes
  • Folic acid
  • Cholecalciferol

Question 35

Question
What can a vitamin B12 deficiency cause?
Answer
  • Macrocyclic megaloblastic anaemia
  • Microcytic anaemia
  • Folate deficiency
  • Microblastic anaemia

Question 36

Question
What is B12 required for?
Answer
  • Converting folate into form active for DNA synthesis
  • Converting folic acid into form active for DNA synthesis
  • Converting folic acid into form active for acid synthesis
  • Converting folate into form active for acid synthesis

Question 37

Question
What is the active form of vitamin C?
Answer
  • Ascorbic acid
  • Cholecalciferol
  • Retinol
  • Folic acid
  • Riboflavin

Question 38

Question
What is the main function of ascorbic acid?
Answer
  • Reducing agent
  • Catalyst
  • Reduces disease
  • Oxidizing agent

Question 39

Question
Who in the population is highest at risk for vitamin B12 deficiency?
Answer
  • Patients with pernicious anemia
  • Patients with atrophied gastritis
  • Vegans
  • Someone taking high doses of folate supplements

Question 40

Question
*** What are some other functions of Vitamin C in the body?
Answer
  • Coenzyme for hydroxylation of prolyl-residues of collagen
  • Coenzyme for hydroxylation of lysyl-residues of collagen
  • Antioxidants preventing oxidative damage caused by free radicals

Question 41

Question
What is retinol?
Answer
  • A primary alcohol
  • An aldehyde derived from retinol
  • An acid derived from oxidation of retinal
  • When oxidized yields 2 molecules of retinal

Question 42

Question
What is retinal?
Answer
  • A primary alcohol
  • An aldehyde derived from oxidation of retinal
  • An acid derived from oxidation of retinal
  • When oxidized yields 2 molecules of retinal

Question 43

Question
What is retinoic acid?
Answer
  • A primary alcohol
  • An aldehyde derived from retinol
  • An acid derived from oxidation of retinal
  • When oxidation yields 2 molecules of retinal

Question 44

Question
What is Beta-Carotene?
Answer
  • A primary alcohol
  • An aldehyde derived from retinol
  • An acid derived from oxidation of retinal
  • When oxidation yields 2 molecules of retinal

Question 45

Question
Where is preformed vitamin A found?
Answer
  • In animal foods
  • In plants
  • In olive oil
  • In whole wheat bread

Question 46

Question
Where is provitamins A found?
Answer
  • In plants
  • In animal foods
  • In olive oil
  • In whole wheat bread

Question 47

Question
What are preformed vitamin A
Answer
  • Retinoids
  • Carotenoids

Question 48

Question
What are provitamins A compounds?
Answer
  • Carotenoids
  • Retinoids

Question 49

Question
what can vitamin A deficiency cause?
Answer
  • Light blindness
  • Weak bones
  • Macrocyclic anaemia
  • Fat retention

Question 50

Question
What is cholecalciferol made in the skin from?
Answer
  • Cholesterol
  • Action of sunlight
  • Vitamin A
  • Amino acids

Question 51

Question
What is cholecalciferol the active form of?
Answer
  • Vitamin D
  • Vitamin C
  • Vitamin A
  • Vitamin E

Question 52

Question
What does vitamin D do in the body?
Answer
  • Maintains blood levels of calcium and phosphorus for bone health
  • Maintains normal function of parathyroid gland and the immune system
  • Prenevts certain types of cancer and heart disease
  • Protects against free radicals

Question 53

Question
What is the only form of Vitamin E that can meet human needs?
Answer
  • Alpha-tocopherol
  • Beta-tocopherol
  • Gamma-tocopherol
  • Delta-tocopherol

Question 54

Question
What is the main source of alpha-tocopherol?
Answer
  • Sunflower seeds
  • White rice
  • Lentils
  • Milk

Question 55

Question
*** what is synthetic alpha-tocopherol made of?
Answer
  • 8 isomers
  • 12 isomers

Question 56

Question
Where is most vitamin E then in the body?
Answer
  • Liver
  • Spleen
  • Stomach
  • Intestines

Question 57

Question
What delivers vitamin E to the tissues in the body?
Answer
  • Lipoproteins
  • Catalysts
  • Carrier enzymes
  • Amalase
  • Lipase

Question 58

Question
What does vitamin E function primarily as?
Answer
  • A fat soluble antioxidant
  • A water soluble antioxidant
  • A fat soluble reducing agent
  • A water soluble reducing agent

Question 59

Question
**** What is absorbed vitamin E incorporated into?
Answer
  • Chylomicrons
  • Ascorbic acid
  • Cholecalciferol

Question 60

Question
What is vitamin E necessary for?
Answer
  • Reproductive function
  • Bone structure
  • Breakdown of fat
  • Kidney function

Question 61

Question
What does vitamin E protect?
Answer
  • Unsaturated fatty acid cells in cell membranes
  • Saturated fatty acid cells in cell membrane
  • Phospholipids in cell membrane
  • Free radicals in cell membranes

Question 62

Question
How does Vitamin E protect the cell membrane?
Answer
  • Neutralizing free radicals
  • Removing fatty acids
  • Replacing fatty acids
  • Repairing phospholipids

Question 63

Question
*** What can consumption in excess of fat soluble vitamins do?
Answer
  • Lead to toxic accumulation
  • Affect storage of water soluble vitamins

Question 64

Question
*** What is riobflavin essential for?
Answer
  • Energy producing reactions
  • Synthesis reaction

Question 65

Question
*** What is niacin essential to?
Answer
  • Energy producing and synthesis reactions
  • Just energy producing reactions
  • Just energy synthesis reactions

Question 66

Question
Which of these vitamins are water soluble?
Answer
  • C
  • B
  • D
  • E
  • K
  • A

Question 67

Question
Label the molecules
Image:
Mobile upload (image/jpeg)
Answer
  • intermediate from run catalyzed by a-KDGH
  • intermediate from rxn catalyzed by PDH
  • thiamine pyrophosphate
  • thiamine

Question 68

Question
A metabolite of tryptophan can also be used in synthesis of NAD+
Answer
  • True
  • False

Question 69

Question
Biotin in the body is important for ...
Answer
  • Energy production
  • Metabolism of fatty acids
  • Metabolism of amino acids

Question 70

Question
The active form of biotin is a coenzyme that adds COOH to molecules
Answer
  • True
  • False

Question 71

Question
Pantothenic acid in the body is needed for...
Answer
  • Synthesis of fatty acids
  • Synthesis of cholesterol
  • Energy production

Question 72

Question
The active form of pantothenic acid is...
Answer
  • A part of coenzyme A
  • A coenzyme that adds COOH to molecules
  • Vitamin B 12
  • Pantotheruse

Question 73

Question
Label the forms of vitamin B 6
Image:
Mobile upload (image/jpeg)
Answer
  • pyridoxal
  • pyridoxal phosphate
  • pyridoxamine
  • pyridoxine
  • isoniazid

Question 74

Question
An isoniazid-anti TB drug can induce vitamin B6 deficiency by forming an inactive derivative with pyridoxal phosphate.
Answer
  • True
  • False

Question 75

Question
Vitamin B6 in the body is important for...
Answer
  • synthesis reactions
  • Energy production
  • Metabolism of fatty acids
  • Metabolism of amino acids

Question 76

Question
Folate coenzymes are needed in the body for...
Answer
  • Transferring chemical groups containing a single carbon atom
  • Synthesis of DNA
  • Metabolism of some amino acids
  • Metabolism of fatty acids
  • Energy production

Question 77

Question
Epidemiological and clinical studies indicate that higher dietary folate intake and blood folate levels are associated with higher risks of certain cancers
Answer
  • True
  • False

Question 78

Question
Choline is needed ....
Answer
  • To synthesize a number of important molecules
  • As a source of carbon atoms
  • For energy synthesis
  • For metabolism of fatty acids

Question 79

Question
Vitamin A effects cell differentiation through its effect of gene expression
Answer
  • True
  • False

Question 80

Question
Vitamin K has 2 forms...
Answer
  • Phylloquinone - found in plants
  • Menaquinone - found in fish oils and meats
  • Menaquinone - can be synthesized by bacteria
  • Phylloquinone x can be synthesized in bacteria

Question 81

Question
Vitamin K can be used in the body for ...
Answer
  • Energy synthesis
  • A coenzyme for the production of prothrombin
  • A coenzyme for the production of blood clotting factors
  • Health of bones
  • Health of blood vessels
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