Biochem - Vitamins

Beschreibung

biochem Quiz am Biochem - Vitamins, erstellt von Alannah McDonnell am 10/03/2018.
Alannah McDonnell
Quiz von Alannah McDonnell, aktualisiert more than 1 year ago
Alannah McDonnell
Erstellt von Alannah McDonnell vor mehr als 6 Jahre
181
2

Zusammenfassung der Ressource

Frage 1

Frage
Which of these vitamins are fat soluble?
Antworten
  • A
  • D
  • E
  • K
  • B
  • C

Frage 2

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

Frage 3

Frage
Function of liver in absorbing vitamins?
Antworten
  • 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

Frage 4

Frage
Where does some niacin absorption occur?
Antworten
  • stomach
  • mouth
  • liver
  • pancreas

Frage 5

Frage
What is absorbed in the small intestine?
Antworten
  • Water soluble vitamins
  • fat soluble vitamins

Frage 6

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

Frage 7

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

Frage 8

Frage
Where is vitamin C absorbed?
Antworten
  • in large intestine
  • stomach
  • pancreas
  • in ileum
  • liver

Frage 9

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

Frage 10

Frage
where is vitamin B12 absorbed?
Antworten
  • ileum
  • stomach
  • large intestine
  • liver
  • pancreas

Frage 11

Frage
what is absorbed in the large intestine?
Antworten
  • 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

Frage 12

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

Frage 13

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

Frage 14

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

Frage 15

Frage
Which vitamins are all co enzymes
Antworten
  • A
  • E
  • D
  • K
  • B
  • C

Frage 16

Frage
What do vitamins do?
Antworten
  • promote body activities
  • regulate body activities
  • enhance body secretions
  • inhibit body secretions

Frage 17

Frage
What vitamins are stored in the body?
Antworten
  • most water soluble vitamins
  • B12
  • fat soluble vitamins
  • B6

Frage 18

Frage
Where are fat soluble vitamins stored?
Antworten
  • Liver
  • Fatty tissues
  • Urine
  • Stomach
  • Large intestine

Frage 19

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

Frage 20

Frage
Function of thiamin in the body?
Antworten
  • 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

Frage 21

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

Frage 22

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

Frage 23

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

Frage 24

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

Frage 25

Frage
Symptoms of folate deficiency
Antworten
  • Poor growth
  • Rapid growth
  • Problems in Nerve development
  • Problems in Nerve function
  • Diarrhea
  • Constipation

Frage 26

Frage
Some causes of neural tube defects?
Antworten
  • Low folate levels
  • High folate levels
  • Genetic predisposition
  • Age

Frage 27

Frage
Spina bifida and anencephaly are two forms of neural tube defects
Antworten
  • True
  • False

Frage 28

Frage
What increases blood homocysteine levels?
Antworten
  • Low intake of folate
  • High intake of folate
  • Low intake of thiamin
  • High intake fo thiamin

Frage 29

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

Frage 30

Frage
UL of folate?
Antworten
  • 1000 micrograms per day
  • 1000 grams per day
  • 1000 milligrams per day
  • 10 grams

Frage 31

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

Frage 32

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

Frage 33

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

Frage 34

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

Frage 35

Frage
What can a vitamin B12 deficiency cause?
Antworten
  • Macrocyclic megaloblastic anaemia
  • Microcytic anaemia
  • Folate deficiency
  • Microblastic anaemia

Frage 36

Frage
What is B12 required for?
Antworten
  • 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

Frage 37

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

Frage 38

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

Frage 39

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

Frage 40

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

Frage 41

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

Frage 42

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

Frage 43

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

Frage 44

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

Frage 45

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

Frage 46

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

Frage 47

Frage
What are preformed vitamin A
Antworten
  • Retinoids
  • Carotenoids

Frage 48

Frage
What are provitamins A compounds?
Antworten
  • Carotenoids
  • Retinoids

Frage 49

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

Frage 50

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

Frage 51

Frage
What is cholecalciferol the active form of?
Antworten
  • Vitamin D
  • Vitamin C
  • Vitamin A
  • Vitamin E

Frage 52

Frage
What does vitamin D do in the body?
Antworten
  • 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

Frage 53

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

Frage 54

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

Frage 55

Frage
*** what is synthetic alpha-tocopherol made of?
Antworten
  • 8 isomers
  • 12 isomers

Frage 56

Frage
Where is most vitamin E then in the body?
Antworten
  • Liver
  • Spleen
  • Stomach
  • Intestines

Frage 57

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

Frage 58

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

Frage 59

Frage
**** What is absorbed vitamin E incorporated into?
Antworten
  • Chylomicrons
  • Ascorbic acid
  • Cholecalciferol

Frage 60

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

Frage 61

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

Frage 62

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

Frage 63

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

Frage 64

Frage
*** What is riobflavin essential for?
Antworten
  • Energy producing reactions
  • Synthesis reaction

Frage 65

Frage
*** What is niacin essential to?
Antworten
  • Energy producing and synthesis reactions
  • Just energy producing reactions
  • Just energy synthesis reactions

Frage 66

Frage
Which of these vitamins are water soluble?
Antworten
  • C
  • B
  • D
  • E
  • K
  • A

Frage 67

Frage
Label the molecules
Antworten
  • intermediate from run catalyzed by a-KDGH
  • intermediate from rxn catalyzed by PDH
  • thiamine pyrophosphate
  • thiamine

Frage 68

Frage
A metabolite of tryptophan can also be used in synthesis of NAD+
Antworten
  • True
  • False

Frage 69

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

Frage 70

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

Frage 71

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

Frage 72

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

Frage 73

Frage
Label the forms of vitamin B 6
Antworten
  • pyridoxal
  • pyridoxal phosphate
  • pyridoxamine
  • pyridoxine
  • isoniazid

Frage 74

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

Frage 75

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

Frage 76

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

Frage 77

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

Frage 78

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

Frage 79

Frage
Vitamin A effects cell differentiation through its effect of gene expression
Antworten
  • True
  • False

Frage 80

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

Frage 81

Frage
Vitamin K can be used in the body for ...
Antworten
  • 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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