ICMR JRF Model Question Paper 2015 (Biology/Life Science MCQ 008 Biochemistry: Amino acids Part 4...
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MCQ 008 Save paper… Save trees… For more Questions and Resources for your CSIR/ICMR/DBT/ICAR/UGC/JRF NET Life Science Examination please visit: www.easybiologyclass.com 1 Biology MCQ (Multiple Choice Questions in Life Science) (Sample/Model/Practice Questions for JRF/NET Life Science Examination, ICMR JRF, DBT JRF, GATE, ICAR NET, PG Entrance) MCQ Biochemistry: Amino Acids Part 4 (MCQ 008) 1. Which group of a fully protonated glycine (NH 3 + ‐ CH 2 – COOH) first release a ‘proton’ when it is titrated against – OH ‐ ions? a. Carboxyl group b. Amino group c. Both at the same time d. It cannot be predicted 2. pKa is the measure of a group to __________ proton. a. Take up b. Release c. Combine d. Consume 3. Which of the following amino acid bears a guanidine group in the side chain? a. Lysine b. Arginine c. Histidine d. Proline 4. The precursor of glycine synthesis in microbes and plants is_______. a. Serine b. Leucine c. Valine d. None of these 5. Single letter code of selenocysteine is _____. a. B b. J c. U d. O 6. Which of the following amino acid have an imino group in the side chain? a. Proline b. Asparagine c. Glutamate d. Histidine 7. 4‐hydroxy proline (a derivative of proline) is abundantly present in _______. a. Keratin b. Myoglobin c. Hemoglobin d. Collagen 8. Desmosine is a complex derivative of five ____________ residues. a. Lysine b. Arginine c. Histidine d. Methionine 9. Isoelectric pH is designated as______. a. pKa b. pI c. Pi www.easybiologyclass.com
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Transcript of ICMR JRF Model Question Paper 2015 (Biology/Life Science MCQ 008 Biochemistry: Amino acids Part 4...
MCQ008 Savepaper…Savetrees…
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BiologyMCQ(MultipleChoiceQuestionsinLifeScience)(Sample/Model/PracticeQuestionsforJRF/NETLifeScienceExamination,ICMRJRF,DBTJRF,GATE,ICARNET,PGEntrance)
MCQBiochemistry:AminoAcidsPart4(MCQ008)
1. Whichgroupofafullyprotonatedglycine(NH3+‐CH2–COOH)firstreleasea‘proton’whenitistitratedagainst–OH‐ions?
a. Carboxylgroupb. Aminogroupc. Bothatthesametimed. Itcannotbepredicted
2. pKaisthemeasureofagroupto__________proton.a. Takeupb. Release
c. Combined. Consume
3. Whichofthefollowingaminoacidbearsaguanidinegroupinthesidechain?a. Lysineb. Arginine
c. Histidined. Proline
4. Theprecursorofglycinesynthesisinmicrobesandplantsis_______.a. Serineb. Leucine
c. Valined. Noneofthese
5. Singlelettercodeofselenocysteineis_____.a. Bb. J
c. Ud. O
6. Whichofthefollowingaminoacidhaveaniminogroupinthesidechain?a. Prolineb. Asparagine
c. Glutamated. Histidine
7. 4‐hydroxyproline(aderivativeofproline)isabundantlypresentin_______.a. Keratinb. Myoglobin
c. Hemoglobind. Collagen
8. Desmosineisacomplexderivativeoffive____________residues.a. Lysineb. Arginine
c. Histidined. Methionine
9. IsoelectricpHisdesignatedas______.a. pKab. pIc. Piwww.ea
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d. Noneofthese10.WhichofthefollowingaminoacidisbiosynthesizedfromRibose5‐phposphate?
a. Histidineb. Serine
c. Glycined. Allofthese
11. AminoacidbiosynthesizedfromPyruvateofglycolysisis_____.a. Alanineb. Valine
c. Leucined. Allofthese
12. Aromaticaminoacids(Phenylalaine,Tyrosine,andTryptophan)arederivedfromPhosphoenolpyruvateand__________.
a. Ribose5‐phosphateb. Erythrose4‐phosphatec. Oxaloacetated. α‐ketoglutarate
13. Isoleucineisderivedfrom___________.a. Methionineb. Threonine
c. Lysined. Leucine
14. Bloodclottingproteinthrombinusuallycontainwhichofthefollowingmodifiedaminoacid?
a. 4‐hydroxyprolineb. 5‐hydroxylysinec. 6‐N‐methyllysined. γ‐carboxyglutamate
15. Cysteineisnotanessentialaminoacidinhuman,sincewehavethemachinerytosynthesizecysteinefromothertwoaminoacidsnamely_______andserine.
a. Methionineb. Selenocysteinec. Citrullined. Hydroxyproline
16.Whichofthefollowingcontainadisulfidebridge?a. Cysteineb. Cystinec. Methionine
d. Noneofthesee. Allofthese
17.Whichofthefollowingproteincontainamodifiedaminoacid–desmosine?a. Keratinb. Gelatinc. Elastind. Collagen
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18. Duringbiosynthesis,MethionineandThreoninearederivedfromacommonintermediate:
a. Chorismateb. Citrullinec. Homoserined. Cystathione
19. 6‐N‐methyllysineisaderivativeoflysine,presentin__________.a. Keratinb. Collagenc. Myosind. Myoglobin
20. AcommonintermediatebranchpointinthesynthesisofallaromaticaminoacidssuchasTryptophan,PhenylalanineandTyrosineis________
a. Homoserineb. Chorismatec. Cystathioned. Noneofthese
21. Sarcosine,aubiquitousnonprotenaciusaminoacidinanimalsandplantsis____.a. N‐methylglycineb. N‐methylvalinec. N‐methylserined. N‐methylmethionine
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