1. TRUE regarding enzymes: Enzymes are proteins Enzymes are specific Enzymes are also called biological catalysts All of the above__ 2. Where will the substrate bind in an enzyme to proceed an enzyme reaction? Active site Allosteric site Alternative site All of the above__ 3. Inorganic molecules that are essential for enzymatic activity is called: Cofactors Coenzymes Isoenzymes All of the above__ 4. Which of the following are coenzymes? Zn2+ NAD ATP All of the above__ 5. What equation can be used to describe enzyme kinetics? Beers Law Equation Michaelis-Menten Equation Henderson-Hasselbach Equation None of the above__ 6. Which of the following refers to the Michaelis conastant? Km Substrate concentration at 1⁄2 Vmax Either Neither__ 7. What type of enzyme inhibition causes conformational changes in the active site of an enzyme? Competitive inhibition Non-competitive inhibition Uncompetitive inhibition __ 8. Competitive inhibition causes what change to Michaelis constant? Unchanged Increase Decrease None of the above__ 9. Zymogens are: Inactive enzymes Active enzymes

1. TRUE regarding enzymes: Enzymes are proteins Enzymes are specific Enzymes are also called biological catalysts All of the above__ 2. Where will the substrate bind in an enzyme to proceed an enzyme reaction? Active site Allosteric site Alternative site All of the above__ 3. Inorganic molecules that are essential for enzymatic activity is called: Cofactors Coenzymes Isoenzymes All of the above__ 4. Which of the following are coenzymes? Zn2+ NAD ATP All of the above__ 5. What equation can be used to describe enzyme kinetics? Beers Law Equation Michaelis-Menten Equation Henderson-Hasselbach Equation None of the above__ 6. Which of the following refers to the Michaelis conastant? Km Substrate concentration at 1⁄2 Vmax Either Neither__ 7. What type of enzyme inhibition causes conformational changes in the active site of an enzyme? Competitive inhibition Non-competitive inhibition Uncompetitive inhibition __ 8. Competitive inhibition causes what change to Michaelis constant? Unchanged Increase Decrease None of the above__ 9. Zymogens are: Inactive enzymes Active enzymes

Which of the following are coenzymes?a. Zn2+b. NADc. ATPd. All of the above

It describes the active form of an enzyme having both protein and nonprotein parts.Question 4Select one:a.coenzymeb.apoenzymec.holoenzymed.cofactor

Enzyme without cofactor is called as ........*1 pointConjugated proteinHoloenzymeApoenzymeCoenzyme9.       Which of the following statements of enzymes are CORRECT?I           Enzymes are highly specificII         Enzymes are proteins that function as a catalystIII        Enzymes lower activation energy of chemical reactions *1 pointI and II onlyI and III onlyII and III onlyI, II and III10.       Which of the following molecules matches its property?I    Competitive inhibitor – similar shape to substrate and can occupy to the same active site. II   Prosthetic group – decreases the rate of enzymatic reaction by changing its structure.III  Active site – specific region of the enzymes which bind to the substrate*1 pointI and II onlyI and III onlyII and III onlyI, II and III11.    Which of the following does NOT occur in glycolysis?*1 pointRemoval of waterPhosphorylation of ADPReduction of NAD+Decarboxylation12.     How many ATP and NADH are formed from one molecule of glyceraldehyde-3-phosphate during the energy pay-off phase in glycolysis?*1 point1 ATP and 1 NADH.2 ATP and 2 NADH.2 ATP and 1 NADH4 ATP and 2 NADH13.    Which of the following processes DOES NOT involve in pyruvate oxidation?*1 pointOxidationDecarboxylationAttachment of coenzyme AOxidative phosphorylation14.    What are the products produced from one molecule of pyruvate that goes through pyruvate oxidation?*1 point2 Acetyl-CoA, 2 molecules of CO2 and 2 NADH + 2H+1 Acetyl-CoA, 1 molecule of CO2 and NADH + H+2 Acetyl-CoA and 2 NADH + 2H+1 Acetyl-CoA and NADH + H+15.       How many CO2 molecules are released in the Krebs cycle if two molecule of glucose is oxidized?*1 point2483216.      Which of the intermediate molecules in Krebs cycle has more than five carbons?*1 pointα-ketoglutarateSuccinyl-CoAFumarateIsocitrate17.       Which of the following is TRUE to describe the pathway of electrons in aerobic respiration?*1 pointglucose → FADH2 → electron transport chain → oxygenglucose → pyruvate → ATP → oxygenglucose → pyruvate → electron transport chain → FADH2 → ATPglucose → glycolysis → Krebs cycle → FADH2 → ATP18.      How many molecules of ATP are produced from the complete oxidation of three molecules of glucose in aerobic respiration?*1 point32387611419.     Choose the stages where substrate-level phosphorylation occurs in cellular respiration.I           GlycolysisII         Krebs cycleIII       Pyruvate oxidation*1 pointI and II onlyI and III onlyII and III onlyI, II and III20.      Which of the following are the industrial products of alcohol fermentation?I          DoughnutII         KimchiIII       Beer*1 pointI and II onlyI and III onlyII and III onlyI, II and III21.      What is the reaction center pigment in photosystem I at thylakoid membrane?*1 pointP600P680P700P78022.      Which statement is TRUE about Calvin cycle?*1 pointOccurs in thylakoid membrane.Require ATP and NADPH.Use sugar to produce CO2.Involves photosystem I and photosystem II23.     Which process DOES NOT occurs during Calvin cycle?*1 pointRegeneration of CO2 acceptorOxidation of NADPHRelease of oxygenUse ATP24.       Which of the following pathways is able to minimize photorespiration in cactus?*1 pointCrassulacean Acid MetabolismCalvin cycleC4 pathwayC3 pathway25.      What are the components required in non-cyclic electron flow?I    PhotonII   WaterIII  Carbon dioxide*1 pointI and III and IIIII and IIII, II and III

Coenzymes play an important role in metabolism because they _____.Multiple choice question.permanently attach to enzymes in order to be effectiveaid in the function of activating enzymes