Basic Biochemistry Multiple Choice Questions PDF

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Practice Multiple Choice Questions based on Basic Biochemistry....

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Review&of&Basic&Chemistry&& & A&large&chain&of&monomers&is&called&--------&&& a) Dimer& b) Macromolecules& c) Polymer& d) Trimer& & Carbohydrates&are&composed&of&the&following&elements&&& a) C,&H,&N& b) C,&H,&O& c) C,&N,&O& d) C,&H,&P& & The&general&formula&for&most&carbohydrates&is&&& a) Cn+1(H2O)n& b) Cn(H2O)n& c) C2n(H2O)n& d) Cn(H2O)n+1& & The&storage&form&of&energy&in&humans&is&&&& a) Carbohydrates& b) Glucose& c) Glycogen& d) Starch& & In&respiration,&glucose&is&oxidized&in&living&cells&to&produce&CO2,&H2O,&and&--------& a) Carbohydrates& b) Energy& c) Glycogen& d) Starch& & A&body’s&-----------&is&the&reverse&of&photosynthesis.& a) Carbohydrates& b) Energy& c) Glycogen& d) Respiration& & Glycogen&is&an&example&of&&------------&formed&of&many&glucose&units.& a) Disaccharides& b) Polysaccharides&& c) Proteins& d) Lipids& & Fat,&oil&and&cholesterol&are&examples&of&----& a) Disaccharides& b) Polysaccharides&&

c) Proteins& d) Lipids& & Fatty&acids&are&important&sources&of&fuel&because&they&yield&large&quantities&of&-----& a) ADP& b) ATP& c) CO2& d) H2& e) NAD& & The&following&triglyceride&has&the&nomenclature&of&-----& a) Oleo,&Palmito,&Stearin& b) Palmito,&Oleo,&Stearin& c) Stearo,&Stearo,&Palmitin& d) Stearo,&Palmito,&Olein& & & A&peptide&bond&is&formed&between&amino&acids&by&-------process.& a) Oxidation& b) Reduction& c) Condensation& d) Amination& & The&bond&formed&between&two&amino&acids&due&to&condensation&is&called&-----------& a) Glycosidic&bond& b) Hydrogen&bonds& c) Ionic&bond& d) Peptide&bond& & All&amino&acids&have&alpha&amino&groups&except&-----------& a) Alanine& b) Lysine& c) Methionine& d) Proline& & Which&of&the&following&amino&acids&is&aromatic&-----------& a) Alanine& b) Lysine& c) Cystein& d) Methionine& e) Tyrosine& & How&many&level&of&protein&structures&do&we&have?& a) 1& b) 2& c) 3& d) 4&

& α-helix&is&what&type&of&protein&structure?& a) Primary& b) Secondary& c) Tertiary& d) Quaternary& & β-sheet&is&what&type&of&protein&structure?& a) Primary& b) Secondary& c) Tertiary& d) Quaternary& & Myocardial&infarction&elevates&serum&levels&of&the&following&enzymes:& a) Albumin&and&lactate&dehydrogenase& b) Creatine&kinase&and&lactate&dehydrogenase& c) Lipase&and&Creatine&kinase&& d) Lipase&and&lactate&dehydrogenase& & How&can&assay&of&plasma&enzymes&aids&diagnosis&and&prognosis?& a) Because&many&diseases&that&cause&tissue&damage&result&in&a&decreased&release&of& extracellular&enzymes&into&the&plasma.& b) Because&many&diseases&that&cause&tissue&damage&result&in&an&increased&release&of& intracellular&enzymes&into&the&plasma.& c) Because&many&diseases&that&cause&tissue&damage&result&in&an&increased&release&of& extracellular&enzymes&into&the&plasma.& d) Because&many&diseases&that&cause&tissue&damage&result&in&an&increased&release&of& intracellular&enzymes&into&urine.& & What&are&the&stores&of&genetic&codes?& a) ATP& b) Carbohydrates& c) Lipids& d) Nucleic&acids& e) Polysaccharides&& & ATP,&NAD+,&NADP+&and&FAD&are&classified&as&--------& a) Carbohydrates& b) Nucleosides& c) Nucleotides& d) Polysaccharides& & Both&DNA&and&RNA&have&the&same&following&nitrogenous&bases& a) Guanine&–&Thymine–&Cytosine& b) Guanine&–&Adenine&–&Cytosine& c) Uracil&–&Adenine&–&Thymine& d) Uracil&–&Adenine&–&Cytosine&

& DNA&has&the&following&nitrogenous&bases& a) Guanine&–&Thymine–&Cytosine&-&Uracil& b) Guanine&–&Cytosine&-&Adenine&–&Thymine& c) Uracil&–&Adenine&–&Thymine&-&Tyrosine& d) Uracil&–&Adenine&–&Cytosine&-&Tyrosine& & RNA&has&the&following&nitrogenous&bases& a) Adenine&–Uracil&-&Thymine&-&Tyrosine& b) Cytosine&-&Guanine&–&Thymine&-&Uracil& c) Guanine&–&Cytosine&-&Adenine&–&Uracil& d) Uracil&–&Adenine&–&Cytosine&-&Tyrosine& & How&DNA&and&RNA&differ&in&sugar?& a) DNA&has&ribose,&whereas&RNA&has&deoxyribose& b) DNA&has&deoxyribose,&whereas&RNA&has&ribose& c) DNA&has&di-hydroxyribose,&whereas&RNA&has&ribose& d) DNA&has&ribose,&whereas&RNA&has&di-hydroxyribose& & The&only&difference&in&nitrogenous&bases&between&RNA&and&DNA&are&--------,&respectively.& a) Guanine&and&Cytosine& b) Uracil&and&Guanine& c) Uracil&and&Thymine& d) Tyrosine&and&Thymine& & --------------&is&the&sum&of&all&chemical&reactions&within&the&cell.& a) Anabolism& b) Catabolism& c) Inhibition& d) Metabolism& & ________!is&the&lysis&of&glucose,&whereas&________is&the&lysis&of&glycogen.&& a) Glycolysis& b) Glycogenolysis& & Glucose&in&blood&increases&in&case&of&__________!and&it&decreases&in&case&of&______! a) Glycogenesis& b) Gluconeogenesis& & Glucose&in&blood&increases&in&case&of&_________!and&it&decreases&in&case&of&_______! a) Glycolysis& b) Glycogenolysis& & & & & &

& --------------&is&the&chemical-storage&form&of&energy&within&the&cell.& a) ATP& b) Fat& c) Glucose& d) Glycogen& e) Lipid& & Most&of&the&energy&in&ATP&are&stored&in&the&bond&between&the&----------------& a) First&and&second&phosphates& b) First&and&third&phosphates& c) Second&and&third&phosphates& & The&role&of&------&is:&& Traps&glucose&within&the&cell& Produces&energy&in&the&form&of&NADH&and&ATP&with&minimal&energy&input& Produces&products&that&are&used&in&other&metabolic&pathways&within&the&cell& a) Glycolysis& b) Glycogenolysis& c) Glycogenesis& d) Gluconeogenesis& & What&is&the&net&product&of&glycolysis&in&terms&of&NADH&and&ATP?& a) +1&ATP&&&+&1&NADH& b) +1&ATP&&&+&2&NADH& c) +2&ATP&&&+&2&NADH& d) +2&ATP&&&+&1&NADH& & Does&glycolysis&produce&energy?& a) Yes& b) No& & What&is&the&fate&of&pyruvate&if&you&are&doing&exercise&(anaerobic)?& a) In&the&cytosol,&NADH&will&be&produced,&which&will&be&used&to&produce&ATP&(energy)& plus&acet-CoA& b) In&the&cytosol,&NAD&will&be&produced,&which&will&be&used&to&produce&ATP&(energy)& plus&lactate& c) In&the&cytosol,&NADH&will&be&produced,&which&will&be&used&to&produce&ADP&plus& lactate& d) In&the&cytosol,&NAD&will&be&produced,&which&will&be&used&to&produce&ATP&(energy)& plus&acet-CoA& & Why&your&body&ache&during&exercise?& a) Due&to&production&of&acetate& b) Due&to&production&of&CO2& c) Due&to&production&of&lactate& d) Due&to&production&of&pyruvate&

& In&Krebs&cycle,&the®ulation&is&mediated&via&allosteric&inhibition&by&products&on&enzymes& used&previously&in&the&cycle.& For&example___________&&&(as&a&by&product)&will&inhibit&the&activity&of&_________,&and& decreases&the&production&of&pyruvate&from&glucose&via&glycolysis.& a) A&decrease&in&citrate& b) An&increase&in&citrate& c) Citrate&synthase& d) Phosphofructokinase& e) Phosphoglucokinase& & In&Krebs&cycle,&the®ulation&is&mediated&via&allosteric&inhibition&by&products&on&enzymes& used&previously&in&the&cycle.For&example,&!!A&increase&is&citrate!will&cause&a&decreased& activity&of&B&Citrate&synthase&via&inhibition&of&phosphofructokinase.& ! a) An&increase&in&citrate& b) Citrate&synthase& c) Citrate&oxidase& d) Citrate&hydroxylase& & In&Krebs&cycle,&glycolysis&of&one&molecule&of&glucose&produces&----&molecules&of&pyruvate.& One&molecule&of&pyruvate&produces&------------.& a) 1;&1&ATP& b) 2;&1&ATP& c) 2;&2&ATP& d) 3;&3&ATP& & ATP&yielded&from&&the&oxidative&phosphorylation&of&ATP&were&much&greater&than&that&of& glycolysis&alone.&& a) True& b) False& & Formation&of&ATP&from&ADP&in&the&mitochondria&using&electron&transport&chain&is&called&------& && a) Coli&cycle& b) Krebs&cycle& c) Oxidative&phosphorylation& d) Reductive&phosphorylation& & How&many&ATP&are&produced&via&electron&transport&phosphorylation&chain&(ETS)?& && a) 8& b) 16& c) 32& d) 64& &...