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LifeSciencesMCQModelQuestions
MultipleChoiceQuestions
Biochemistry:AminoAcidsPart1(MCQ005)
1. Whichofthefollowingaminoacidissweetintaste?a. Glycineb. Alanine
c. Glutamicacidd. Noneofthese
2. Whichofthefollowingaminoacidactasinhibitoryneurotransmitter?a. Glycineb. Alaninec. GABA
d. Allofthesee. Noneofthese
3. TheaminoacidcommonlyusedasaningredientinthebuffersofSDSPAGE.a. Asparticacidb. Glutamicacidc. Glycined. AsparticacidandLysinetogether
4. Whichofthefollowingaminoacidwillbeabsentinα(alpha)helixstructureofprotein?
a. Glycineb. Galine
c. Glutamicacidd. Proline
5. Aminolevulinicacid,thefirstproductinporphyrinbiosynthesisineukaryotes,issynthesizedfrom_______andsuccinyl‐CoA.
a. Valineb. Tryptophan
c. Methionined. Glycine
6. Carnosineisadipeptideofhistidineand________a. β‐histidineb. β‐alaninec. β‐lysine
d. α‐lysinee. Tryptophan
7. WhichofthefollowingenzymecontainSelenocysteine?a. Nitratereductaseb. Catalase
c. Glutathioneperoxidased. Allofthese
8. Aminoacidusedinthe‘stripping’ofWesternblottingexperimentis:a. Glutamicacidb. Phenylalanine
c. Alanined. Glycine
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9. Totalnumberofproteinogenic(proteinbuilding)aminoacidsinthelivingworldis____.
a. 20b. 21
c. 22d. 23
10. Aminoacidselenocysteineiscodedby_______a. UAAb. UAG
c. UGAd. AUG
11. Whichofthefollowingisaglucogenicaminoacid?a. Glycineb. Prolinec. Alanine
d. Both(a)and(b)e. Allofthese
12. Whichofthefollowingaminoacidactasexcitatoryneurotransmitter?a. Glutamateb. Aspartatec. Cysteine
d. Allofthesee. Noneofthese
13. Whichaminoacidactastheprecursorofnucleotidebiosynthesis?a. Aspartateb. Glycinec. Glutamine
d. Both(a)and(b)e. Allofthese
14. BacteriaprefertousethecodonCGAinsteadofAGAtocodeforArginine.Thisisanexamplefor
a. Secondgeneticcodeb. Nullomersc. Transcriptionaldecodingd. Allomers
15. Whichofthefollowingisanexampleforabio‐plastic?a. Polyaspartateb. Polyglutamate
c. Poly‐L‐lysined. Allofthese
16. Histonesarerichin__________.a. Lysineb. Arginine
c. Histidined. LysineandArginine
17. Singlelettercodeofpyrrolysineis_______.a. Bb. J
c. Od. U
18. Whichofthefollowingisnotanessentialaminoacid?a. Prolineb. Histidine
c. Leucined. Methionine
19. WhatisthemolecularweightofGlycine?www.easy
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a. 75g·mol−1b. 80g·mol−1
c. 90g·mol−1d. 95g·mol−1
20. Amongthe20standardproteinscodingaminoacids,whichoneisleastoccursinproteins?
a. Glycineb. Alaninec. Tryptophand. Methionine
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