Week 10 water soluble vitamin questions PDF

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Lecturer- Stephanie Godrich...

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Chapter10:Thewater‐solublevitamins Multiplechoice 1. a. b. c. d.

Whichofthefollowingisafeatureofvitamins? Manyvitaminsservetheroleofenzymeinhibitors. Structurally,manyvitaminsarefoundlinkedtogether. Severalvitaminsmaybeoxidisedtoyieldfourkilojoulespergram. Thequantitiesofvitaminspresentinfoodsaremeasuredinmicrogramsormilligrams. ANS:

a. b. c. d.

Whatismeantbythebioavailabilityofavitamininfood? Thetotalamountavailablefromplantandanimalfood Theamountabsorbedandsubsequentlyusedbythebody Theamountthatescapesdestructionfromfoodprocessing Thenumberofdifferentchemicalformsofthesamevitamin ANS:

  2.

  3. a. b. c. d.

Generalcharacteristicsofthewater‐solublevitaminsincludeallofthefollowing,except: theymustbeconsumeddaily. toxiclevelsinthebodyarerarelyfound. theyareabsorbeddirectlyintotheblood. excessesareeliminatedfromthekidneys. ANS:

a. b. c. d.

Whichofthefollowingvitaminswouldberemovedduringtheproductionofskimmilk? Thiamin VitaminA Riboflavin VitaminB12 ANS:

a. b. c. d.

Cookingafoodinliberalamountsofwaterisleastlikelytoaffectthevitamincontentof: folate. thiamin. vitaminA. riboflavin. ANS:

a. b. c. d.

Whatistheprimaryexcretoryrouteforthewater‐solublevitamins? Bile Kidney Intestine Perspiration ANS:

  4.

  5.

  6.

  7.  a. b. c. d.   8. a. b. c.

WhichofthefollowingstatementsexplainswhyB‐vitamindeficienciesleadtoalackof energy? Bvitaminsareasourceofkilojoules. Theabsorptionofcarbohydratesandfatsisdecreased. Theoxygenrequiredforenergymetabolismcannotbetransportedtothecells. Thecoenzymesneededforenergymetabolismareproducedininsufficientamounts. ANS: Whichofthefollowingdescribesthebasicfunctionofacoenzyme? ItattachestoRNAtoassistinthesynthesisofanenzyme. Itattachestocellmembranestoassistinuptakeofanenzyme. Itattachestoanenzymeandallowsachemicalreactiontotakeplace.

d.   9.

Itattachestoanenzyme,whichallowsfortransportoftheenzymethroughthecirculation. ANS:

a. b. c. d.

Adeficiencyofthiaminresultsintheconditionknownas: pellegra. beriberi. perniciousanaemia. Wernicke–Korsakoff. ANS:

a. b. c. d.

Allofthefollowingarecharacteristicsofthiaminnutrition,except: severedeficiencymayleadtooedema. severedeficiencymayoccurwithoutoedema. recommendedintakesarestatedin‘equivalents’. recommendedintakesarebasedprimarilyonparticipationinenzymeactivity. ANS:

  10.

  11. a. b. c. d.   12.

Howdoesthemethodofcookingaffectthiaminstability? Microwavingfoodconservesmuchofitsthiamin. Prolongedheatingoffoodhaslittle,ifany,effectonitsthiamin. Boilingfoodtendstoconserveitsthiaminbyformingastable,hydratedcomplex. Steamingfoodcanleadtosubstantialthiaminlossduetothehighheatneededtoformthe steam. ANS:

a. b. c. d.

Whichofthefollowingconditionsisindicativeofadietarydeficiencyofriboflavin? Beriberi Diarrhoea Keratomalacia Inflamedmouthmembranes ANS:

a. b. c. d.

Whatisariboflavonosis? ThevitaminB2deficiencydisease FoodsourcesdevoidofvitaminB2 UltravioletdestructionofvitaminB2 ExcessiveheatdestructionofvitaminB2 ANS:

  13.

  14.  a. b. c. d.   15. a. b. c. d.   16. a. b.

Ofthefollowingcommonlyeatenfoods,whichmakesthegreatestcontributionto riboflavinintake? Milk Potatoes Orangejuice Peanutbutter ANS: Riboflavinismosteasilydestroyedthroughexposureto: heat. acid. alkali. ultravioletlight. ANS: Whichofthefollowingisapropertyofniacininnutrition? Itissusceptibletodestructioninfoodsthatareexposedtolight. Itprimarilyparticipatesinreactionsinvolvingaminoacids.

c. d.   17.  a. b. c. d.   18.    a. b. c. d.   19.



Whichofthefollowingnutrientsfunctionstopreventtheappearanceofabilateral, symmetricaldermatitis,primarilyonareasexposedtothesun? Niacin Choline Inositol Riboflavin ANS: Whileresearchingyourfamilyhistory,youfindthatyourgrandmotherhadasisterwho diedfairlyyoung.Thesymptomsleadinguptoherdeathincludeddiarrhoea,dermatitis anddementia.Becausethefamilyledapoor,corn‐farmingexistence,yoususpectthis relativediedof: scurvy. cancer. pellagra. beriberi. ANS:

a. b. c. d.

Biotincanbesynthesisedby: avidin. theskin. theliver. intestinalbacteria. ANS:

a. b. c. d.

WhatvitaminformsapartofcoenzymeA? Biotin Folate Riboflavin Pantothenicacid ANS:

  20.



Itissolubleinbothwaterandlipids,dependinguponitschemicalform. Itcanbesynthesisedinthebodyfromtheessentialaminoacidtryptophan. ANS:...