82 + Interview Questions in Principles of Bioenergetics and Glycolysis in Biochemistry Page 1 InterviewSolution

1.	What is the first reaction of the pentose phosphate pathway?(a) Oxidation of glucose 6-phosphate to 6-phosphoglucono-δ-lactone(b) Oxidation of 6-phosphogluconate to ketopentose ribulose 5-phosphate(c) Reduction of 6-phosphoglucono-δ-lactone to glucose 6-phosphate(d) Reduction of ketopentose ribulose 5-phosphate to 6-phosphogluconateThis question was addressed to me in an interview for job.This question is from Pentose Phosphate Pathway of Glucose Oxidation in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct answer is (a) Oxidation of glucose 6-phosphate to 6-phosphoglucono-δ-lactone For explanation: The FIRST reaction of the PENTOSE phosphate PATHWAY is the oxidation of glucose 6-phosphate to 6-phosphoglucono-δ-lactone by glucose 6-phosphate DEHYDROGENASE.

Discussion

2.	Which enzyme catalyzes the conversion of pyruvate to oxaloacetate?(a) Pyruvate carboxylase(b) Pyruvate dehydrogenase(c) Pyruvate kinase(d) Phosphofructokinase-1I have been asked this question during an interview for a job.I want to ask this question from Gluconeogenesis in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct OPTION is (a) PYRUVATE CARBOXYLASE The BEST I can explain: Pyruvate carboxylase requires the coenzyme BIOTIN to convert pyruvate to oxaloacetate.

Discussion

3.	Dextrin hydrolysis yields ___________(a) D-galactose and D-glucose(b) 2-D-glucose(c) n-D-glucose(d) 2-D-fructoseI have been asked this question in semester exam.The doubt is from Feeder Pathways for Glycolysis topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT answer is (c) n-D-glucose The BEST EXPLANATION: Dextrin hydrolysis yields n-D-glucose.

Discussion

4.	Dihydroxyacetone phosphate is rapidly and reversibly converted to ___________(a) Glyceraldehyde 3-phosphate(b) 1, 3-bis-phosphoglycerate(c) Fructose 1, 6-bisphosphate(d) Fructose 6-phosphateThe question was asked in my homework.Asked question is from Glycolysis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT OPTION is (a) Glyceraldehyde 3-phosphate To EXPLAIN: DIHYDROXYACETONE phosphate is rapidly and reversibly converted to glyceraldehyde 3-phosphate by TRIOSE phosphate isomerase.

Discussion

5.	Cleavage of Fructose 1, 6-biophosphate yields ___________(a) Two aldoses(b) Two ketoses(c) An aldose and a ketose(d) Only a ketoseI got this question in examination.Origin of the question is Glycolysis in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Right OPTION is (c) An aldose and a KETOSE Explanation: FRUCTOSE 1, 6-biophosphate is CLEAVED to yield GLYCERALDEHYDE 3-phosphate, an aldehyde and dihydroxyacetone phosphate, a ketose.

Discussion

6.	Which is an example of electromagnetic to electrical energy conversion that occurs in living organisms?(a) ATP-driven muscle contraction(b) ATP-dependent photon emission in fireflies(c) light-induced electron flow in chloroplasts(d) ATP-driven active transport across a membraneThe question was posed to me in class test.My question is from Phosphoryl Group Transfers and ATP in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct option is (c) light-induced electron flow in chloroplasts Best explanation: ATP-driven MUSCLE CONTRACTION is an example for chemical to mechanical energy conversion. ATP-dependent photon emission in FIREFLIES is an example for chemical to ELECTROMAGNETIC energy conversion. ATP-driven active transport across a MEMBRANE is an example for chemical to osmotic energy conversion.

Discussion

7.	What does first law of thermodynamics state?(a) Energy can neither be destroyed nor created(b) Energy cannot be 100 percent efficiently transformed from one type to another(c) All living organisms are composed of cells(d) Input of heat energy increases the rate of movement of atoms and moleculesI had been asked this question during an online interview.The origin of the question is Bioenergetics and Thermodynamics topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct option is (a) Energy can neither be DESTROYED nor CREATED The best I can explain: FIRST law of thermodynamics can also be termed as law of conservation of energy which states that energy can neither be destroyed nor created but can be TRANSFORMED from one form of energy to ANOTHER.

Discussion

8.	Which product is formed in the isomerization of mannose 6-phosphate?(a) Fructose 6-phosphate(b) Glucose 6-phosphate(c) 2-phosphoglycerate(d) 3-phosphoglycerateI had been asked this question in an interview.This interesting question is from Feeder Pathways for Glycolysis in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct OPTION is (a) FRUCTOSE 6-phosphate To EXPLAIN I would say: Mannose 6-phosphate is isomerized by phosphomannose ISOMERASE to yield fructose 6-phosphate.

Discussion

9.	Phosphoryl groups are derivatives of ____________(a) Phosphorous acid(b) Phosphoric acid(c) Acetic acid(d) Citric acidThe question was asked by my school principal while I was bunking the class.My query is from Phosphoryl Group Transfers and ATP topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT option is (B) Phosphoric ACID Easiest EXPLANATION: Phosphoryl groups are derivatives of phosphoric acid.

Discussion

10.	Water does a nucleophilic attack on phosphate monoester by producing ____________(a) Phosphorous chloride(b) Phosphorous sulfide(c) Inorganic phosphate(d) Organic phosphateI got this question during a job interview.Enquiry is from Phosphoryl Group Transfers and ATP topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Right choice is (c) Inorganic PHOSPHATE The best I can EXPLAIN: Inorganic phosphate is PRODUCED when a NUCLEOPHILIC attack is done by water on phosphate monoester.

Discussion

11.	Gain of electrons can be termed as ___________(a) Metabolism(b) Anabolism(c) Oxidation(d) ReductionThe question was asked during an online exam.I'd like to ask this question from Biological Oxidation-Reduction Reactions topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct OPTION is (d) REDUCTION Best EXPLANATION: Only reduction INVOLVES the gain of electrons.

Discussion

12.	An exergonic reaction ____________(a) Proceeds spontaneously(b) Does not require activation energy(c) Releases energy(d) Requires energyI got this question in an international level competition.The origin of the question is Phosphoryl Group Transfers and ATP topic in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT option is (C) RELEASES energy Easy explanation: Exergonic REACTION involves release of energy.

Discussion

13.	Which enzyme is involved in the pathway of synthesis of acetyl-coA?(a) Hexokinase(b) Pyruvate decarboxylase(c) Pyruvate dehydrogenase(d) Pyruvate kinaseI had been asked this question in exam.I want to ask this question from Fates of Pyruvate under Anaerobic Conditions: Fermentation topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT CHOICE is (C) Pyruvate DEHYDROGENASE The explanation: In the synthesis of acetyl-coA, pyruvate dehydrogenase is INVOLVED.

Discussion

14.	Which is the major factor(s) determining whether glucose is oxidized by aerobic or anaerobic glycolysis?(a) Ca^+2(b) FADH2(c) NADH and the ATP/ADP ratio(d) Presence of high AMPThis question was posed to me in exam.My question is taken from Fates of Pyruvate under Anaerobic Conditions: Fermentation in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT choice is (C) NADH and the ATP/ADP ratio The BEST I can EXPLAIN: NADH and the ATP/ADP ratio are the major factors determining whether glucose is oxidized by aerobic or by anaerobic glycolysis.

Discussion

15.	Which out of the following is not a flavoprotein?(a) Succinate dehydrogenase(b) Cytochrome c(c) Xanthine oxidase(d) NADH dehydrogenase-QreductaseThis question was posed to me in unit test.My doubt stems from Biological Oxidation-Reduction Reactions topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT ANSWER is (b) Cytochrome c Best EXPLANATION: Cytochrome c is not a flavoprotein. Flavoproteins involve in oxidation reactions where loss of ELECTRONS takes place but cytochrome c accepts electrons.

Discussion

16.	Which is an example of chemical to electromagnetic energy conversion that occurs in living organisms?(a) ATP-driven muscle contraction(b) ATP-dependent photon emission in fireflies(c) light-induced electron flow in chloroplasts(d) ATP-driven active transport across a membraneThe question was posed to me during an interview for a job.The doubt is from Phosphoryl Group Transfers and ATP in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct choice is (b) ATP-dependent photon emission in fireflies For explanation I would say: ATP-driven MUSCLE contraction is an example for CHEMICAL to mechanical energy CONVERSION. Light-induced electron flow in chloroplasts is an example for electromagnetic to electrical energy conversion. ATP-driven active TRANSPORT across a membrane is an example for chemical to OSMOTIC energy conversion.

Discussion

17.	An endergonic reaction ____________(a) Proceeds spontaneously(b) Does not require activation energy(c) Releases energy(d) Requires energyI got this question in an interview for job.Question is from Phosphoryl Group Transfers and ATP topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT answer is (d) REQUIRES energy To EXPLAIN: Endergonic reaction involves INTAKE of energy.

Discussion

18.	Which of the following statements about gluconeogenesis is correct?(a) Pyruvate is first converted to phosphoenolpyruvate by phosphoenolpyruvate carboxykinase(b) Fructose 1, 6-biphosphatase converts fructose 1, 6-bisphosphate into fructose 1-phosphate(c) Glucose 6-phosphatase hydrolyzes glucose 6-phosphate to release glucose into the blood(d) Glucose 6-phosphatase hydrolyzes glucose 6-phosphate and is found in liver and muscleI got this question by my school principal while I was bunking the class.The query is from Gluconeogenesis topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct answer is (C) Glucose 6-phosphatase HYDROLYZES glucose 6-phosphate to release glucose into the blood For explanation I WOULD say: Glucose 6-phosphate is HYDROLYZED by glucose 6-phosphatase to release glucose into blood.

Discussion

19.	Ethanol is oxidized to acetaldehyde in the liver cytoplasm by ____________(a) Alcohol dehydrogenase(b) Alcohol carboxylase(c) Pyruvate carboxylase(d) Pyruvate kinaseI have been asked this question during an internship interview.I want to ask this question from Gluconeogenesis in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT option is (a) Alcohol dehydrogenase Best explanation: Ethanol is oxidized to acetaldehyde in the LIVER cytoplasm by alcohol dehydrogenase which is the CONVERTED to ACETATE.

Discussion

20.	What are the end products in ethanol fermentation?(a) Ethanol and CO2(b) Ethanol and O2(c) Ethanol, H2 and CO2(d) Ethanol, O2 and CO2I had been asked this question in an internship interview.This intriguing question comes from Fates of Pyruvate under Anaerobic Conditions: Fermentation in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct option is (a) ETHANOL and CO2 To explain I would SAY: Overall equation of ethanol fermentation: Glucose +2ADP + 2Pi → 2 ethanol + 2CO2 + 2ATP + 2H2O.

Discussion

21.	Anabolism and catabolism are chemically linked in the form of __________(a) ADP(b) ATP(c) Phosphodiester linkage(d) ASPThis question was posed to me in unit test.The origin of the question is Phosphoryl Group Transfers and ATP topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct option is (b) ATP Easiest EXPLANATION: ANABOLISM is an energy intake process where small molecules BUILD upto large molecules whereas catabolism involves the RELEASE of energy where large molecules tear down to SMALLER molecules.

Discussion

22.	Which of the following organisms cannot convert acetyl-coA derived from fatty acids into glucose?(a) Animals(b) Plants(c) Bacteria(d) VirusI got this question during an interview.I need to ask this question from Gluconeogenesis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct CHOICE is (a) ANIMALS The explanation: Animals cannot convert acetyl-coA derived from FATTY ACIDS into glucose; plants and microorganisms can.

Discussion

23.	Which enzyme is involved in the pathway of ethanol fermentation?(a) Hexokinase(b) Pyruvate decarboxylase(c) Pyruvate dehydrogenase(d) Pyruvate kinaseThis question was posed to me in exam.This is a very interesting question from Fates of Pyruvate under Anaerobic Conditions: Fermentation in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct OPTION is (b) Pyruvate decarboxylase Explanation: DECARBOXYLATION of pyruvate is CATALYZED by pyruvate decarboxylase.

Discussion

24.	When glucose is converted to lactate by anaerobic glycolysis, equivalent number of ATPs derived is?(a) 1(b) 2(c) 3(d) 4The question was asked by my college director while I was bunking the class.This question is from Fates of Pyruvate under Anaerobic Conditions: Fermentation topic in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct OPTION is (b) 2 Explanation: 2 ATP molecules are released when glucose is converted to LACTATE by anaerobic GLYCOLYSIS.

Discussion

25.	The conversion of which of the following involves two nucleotide derivatives?(a) Galactose 1-phosphate to glucose 1-phosphate(b) Galactose 1-phosphate to fructose 1-phosphate(c) Fructose 1-phosphate to glucose 1-phosphate(d) Lactose 1-phosphate to glucose 1-phosphateThe question was asked during an online exam.The origin of the question is Feeder Pathways for Glycolysis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT answer is (a) Galactose 1-phosphate to glucose 1-phosphate To explain I would say: The conversion of galactose 1-phosphate to glucose 1-phosphate INVOLVES TWO NUCLEOTIDE derivatives: UDP-galactose and UDP-glucose.

Discussion

26.	The deficiency of which of the following enzyme leads to galactosemia?(a) Galactokinase(b) Pyruvate kinase(c) PFK-1(d) PFK-2The question was asked by my school teacher while I was bunking the class.My question is from Feeder Pathways for Glycolysis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT option is (a) Galactokinase Best explanation: In galactokinase deficiency GALACTOSEMIA, high galactose CONCENTRATIONS are FOUND in blood and urine.

Discussion

27.	Which of the following enzyme catalyses the direct transfer and incorporation of O2 into a substrate molecule is(a) Reductase(b) Oxidase(c) Oxygenase(d) PeroxidaseThis question was posed to me in a job interview.I want to ask this question from Biological Oxidation-Reduction Reactions topic in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT CHOICE is (c) Oxygenase Easiest explanation: Oxygenase CATALYSES the direct transfer and INCORPORATION of O2 into a SUBSTRATE molecule.

Discussion

28.	Which of the following statements is false about ATP hydrolysis?(a) It is highly exergonic(b) Activation energy is relatively high(c) ∆G^‘°=-30.5kJ/mol(d) ∆G^‘°=30.5kJ/molI got this question by my college professor while I was bunking the class.This interesting question is from Phosphoryl Group Transfers and ATP topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT CHOICE is (d) ∆G^‘°=30.5kJ/mol To EXPLAIN: ∆G^‘° should be NEGATIVE for an exergonic PROCESS.

Discussion

29.	Conversion of xylulose 5-phosphate to ribulose 5-phosphate is catalyzed by ___________(a) Phosphopentose epimerase(b) Transaldolase(c) Transketolase(d) Phosphopentose isomeraseI got this question in homework.The question is from Pentose Phosphate Pathway of Glucose Oxidation in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct option is (a) Phosphopentose epimerase The EXPLANATION is: Conversion of xylulose 5-phosphate to RIBULOSE 5-phosphate is CATALYZED by epimerase.

Discussion

30.	Which of the following statements is correct about oxidative pentose phosphate pathway?(a) It generates NADH(b) It oxidizes NADPH to NADP^+(c) The pathway supplies ribose 5-phosphate and NADPH in the quantities the cell requires(d) Glucose 6-phosphatase catalyzes the rate limiting reaction of the pathwayThis question was addressed to me in an internship interview.The query is from Pentose Phosphate Pathway of Glucose Oxidation topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct answer is (c) The PATHWAY supplies RIBOSE 5-phosphate and NADPH in the QUANTITIES the cell requires Best explanation: Oxidative pentose phosphate pathway supplies ribose 5-phosphate and NADPH in the quantities the cell requires. It REDUCES NADP^+ to NADPH.

Discussion

31.	Which of the following is true about the enzyme producing NADH from a triose phosphate in the glycolytic pathway?(a) It produces 1, 3-biphosphoglycerate and NADH(b) It catalyzes irreversible reaction(c) It uses NAD^+ and dihydroxyacetone phosphate as substrates(d) It uses FADH2 and glyceraldehyde 3-phosphate as substratesThe question was asked in an online interview.My enquiry is from Fates of Pyruvate under Anaerobic Conditions: Fermentation in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT answer is (a) It produces 1, 3-biphosphoglycerate and NADH Easiest explanation: Triose phosphate, glyceraldehyde 3-phosphate is oxidized to 1, 3-biphosphoglycerate in the PRESENCE of DEHYDROGENASE ENZYME.

Discussion

32.	Which out of the following has the highest redox potential?(a) NAD(b) FMN(c) FAD(d) O2The question was posed to me in an internship interview.The origin of the question is Biological Oxidation-Reduction Reactions topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT option is (d) O2 The EXPLANATION is: O2 has the highest REDOX POTENTIAL.

Discussion

33.	Unfolding of regular secondary protein structure causes ____________(a) Large decrease in the entropy of the protein(b) Little increase in the entropy of protein(c) No change in the entropy of the protein(d) Large increase in the entropy of the proteinI have been asked this question in examination.My question is from Bioenergetics and Thermodynamics topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT choice is (d) Large increase in the entropy of the protein For explanation: Entropy increases on a larger scale when unfolding of secondary protein STRUCTURE TAKES PLACE.

Discussion

34.	Unfolding of regular secondary protein structure causes ____________(a) Large decrease in the entropy of the protein(b) Little increase in the entropy of protein(c) No change in the entropy of the protein(d) Large increase in the entropy of the proteinThe question was asked during an online exam.My doubt is from Bioenergetics and Thermodynamics topic in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer»

Discussion

35.	Which of the following is not an important precursor of glucose in animals?(a) Lactate(b) Pyruvate(c) Glycerol(d) Glucose 6-phosphateThe question was asked in class test.This key question is from Gluconeogenesis in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct OPTION is (d) Glucose 6-phosphate To ELABORATE: The important precursors of glucose in ANIMALS are three-carbon compounds such as LACTATE, pyruvate and glycerol as well as certain amino acids.

Discussion

36.	Maltose hydrolysis yields ___________(a) D-galactose and D-glucose(b) 2-D-glucose(c) n-D-glucose(d) 2-D-fructoseI have been asked this question in class test.I need to ask this question from Feeder Pathways for Glycolysis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT CHOICE is (B) 2-D-glucose For EXPLANATION: Maltose hydrolysis yields 2-D-glucose.

Discussion

37.	Which of the following conversions is not catalyzed by hexokinase?(a) D-Glucose to glucose 6-phosphate(b) D-Fructose to fructose 6-phosphate(c) D-Mannose to mannose 6-phosphate(d) D-Fructose to fructose 1-phosphateI have been asked this question by my school teacher while I was bunking the class.Origin of the question is Feeder Pathways for Glycolysis topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct ANSWER is (d) D-FRUCTOSE to fructose 1-phosphate Explanation: Conversion of D-Fructose to fructose 1-phosphate is CATALYZED by FRUCTOKINASE.

Discussion

38.	Whenever the cell’s ATP supply is depleted, which of the following enzyme’s activity is increased?(a) Hexokinase(b) Pyruvate kinase(c) Glucokinase(d) Phosphofructokinase-1I have been asked this question during a job interview.I'd like to ask this question from Glycolysis topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct CHOICE is (d) Phosphofructokinase-1 The best I can explain: Phosphofructokinase-1 is a REGULATORY enzyme; it is the major point of REGULATION in glycolysis. Its ACTIVITY is increased whenever the cell’s ATP supply is depleted.

Discussion

39.	Which of the following is false about acetyl-coA?(a) It is a thioester(b) It has a large, negative standard free energy of hydrolysis(c) It contains phosphorous atom in the position occupied by an oxygen atom in oxygen esters(d) It contains a sulfur atom in the position occupied by an oxygen tom in oxygen estersThe question was asked in an interview for job.Query is from Phosphoryl Group Transfers and ATP topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» CORRECT option is (c) It CONTAINS PHOSPHOROUS atom in the position occupied by an oxygen atom in oxygen esters Explanation: Acetyl-coA is a thioester CONTAINING phosphorous atom in the position occupied by an oxygen atom in oxygen esters.

Discussion

40.	The use of NADPH generated from pentose phosphate pathway cannot be ____________(a) oxidized in the electron transport chain to provide 38 ATPs(b) Used for the synthesis of fatty acids(c) Used for the macrophageal functions(d) Used for steroid synthesisI got this question in an interview for job.Enquiry is from Pentose Phosphate Pathway of Glucose Oxidation topic in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT choice is (a) oxidized in the electron TRANSPORT chain to PROVIDE 38 ATPs Easy EXPLANATION: NADPH cannot be oxidized in the electron transport chain to provide 38 ATPs.

Discussion

41.	Formation of one molecule of glucose from pyruvate requires ____________(a) 4 ATP, 2 GTP and 2 NADH(b) 3 ATP, 2 GTP and 2 NADH(c) 4 ATP, 1 GTP and 2 NADH(d) 2 ATP, 2 GTP and 2 NADHThe question was asked in examination.The origin of the question is Gluconeogenesis in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» RIGHT answer is (a) 4 ATP, 2 GTP and 2 NADH Easiest EXPLANATION: Formation of one molecule of GLUCOSE from pyruvate requires 4 ATP, 2 GTP and 2 NADH.

Discussion

42.	Which substrate is used in the last step of glycolysis?(a) Glyceraldehyde 3-phosphate(b) Pyruvate(c) Phosphoenolpyruvate(d) 1, 3-bisphosphoglycerateI have been asked this question in exam.My question is taken from Glycolysis topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Right choice is (c) Phosphoenolpyruvate The best explanation: The last step in GLYCOLYSIS is the TRANSFER of phosphoryl GROUP from phosphoenolpyruvate to ADP catalyzed by pyruvate kinase.

Discussion

43.	Loss of electrons can be termed as ______________(a) Metabolism(b) Anabolism(c) Oxidation(d) ReductionThis question was addressed to me by my college professor while I was bunking the class.I'd like to ask this question from Biological Oxidation-Reduction Reactions in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The correct option is (C) OXIDATION The explanation: Only oxidation INVOLVES LOSS of electrons.

Discussion

44.	The phosphate groups used during glycolysis are ____________(a) Organic(b) Inorganic(c) Neutral(d) NoneThis question was posed to me in unit test.My doubt is from Phosphoryl Group Transfers and ATP topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Right option is (b) INORGANIC The explanation is: Phosphorous can only be PRODUCED from inorganic PHOSPHATE.

Discussion

45.	The study of energy relationships and conversions in biological systems is called as ____________(a) Biophysics(b) Biotechnology(c) Bioenergetics(d) MicrobiologyI had been asked this question in an online quiz.Query is from Bioenergetics and Thermodynamics topic in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct choice is (c) Bioenergetics For EXPLANATION: Bioenergetics is the STUDY of ENERGY relationships and conversions in BIOLOGICAL SYSTEMS.

Discussion

46.	∆G° is defined as the ____________(a) Residual energy present in the reactants at equilibrium(b) Residual energy present in the products at equilibrium(c) Difference in the residual energy of reactants and products at equilibrium(d) Energy required in converting one mole of reactants to one mole of productsThis question was addressed to me in a job interview.My question comes from Bioenergetics and Thermodynamics topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» The CORRECT CHOICE is (d) ENERGY required in converting one mole of reactants to one mole of products The best explanation: ∆G° is defined as the energy required in converting one mole of reactants to one mole of products.

Discussion

47.	Which of the following statements is correct about the reductive pentose phosphate pathway?(a) It is not reversible(b) Transketolase transfers 3 carbon units(c) Transaldose transfers 2 carbon units(d) Pentoses can provide glycolytic intermediatesI had been asked this question during an interview.Question is taken from Pentose Phosphate Pathway of Glucose Oxidation topic in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct choice is (d) Pentoses can PROVIDE GLYCOLYTIC intermediates To elaborate: It is REVERSIBLE, transketolase transfers 2 CARBON units and transaldose transfers 3 carbon units.

Discussion

48.	In the reduction of pyruvate to lactate, which of the following is regenerated?(a) H^+(b) NADH(c) NAD^+(d) Na^+I got this question in an interview.This is a very interesting question from Fates of Pyruvate under Anaerobic Conditions: Fermentation in portion Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct OPTION is (C) NAD^+ The best I can explain: NAD^+ is regenerated from NADH by the reduction of pyruvate to LACTATE.

Discussion

49.	Which of the following statements is false about gluconeogenesis?(a) From the hydrolysis of tri-acyl-glycerol, fatty acids can be used as a carbon source(b) From red blood cells, lactate can be used as a carbon source(c) From the hydrolysis of tri-acyl-glycerol, glycerol is converted to glucose in gluconeogenesis(d) From muscle vigorous muscle activity, lactate can be used as a carbon sourceI got this question by my school teacher while I was bunking the class.I would like to ask this question from Gluconeogenesis in section Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Right CHOICE is (a) From the HYDROLYSIS of tri-acyl-glycerol, fatty acids can be used as a carbon SOURCE To EXPLAIN I would say: From the hydrolysis of tri-acyl-glycerol, fatty acids cannot be used as a carbon source.

Discussion

50.	Hydrolysis of sucrose yields ___________(a) D-galactose and D-glucose(b) D-glucose and D-glucose(c) D-galactose and D-fructose(d) D-fructose and D-glucoseI had been asked this question during an interview.I would like to ask this question from Feeder Pathways for Glycolysis in division Principles of Bioenergetics and Glycolysis of Biochemistry
Answer» Correct ANSWER is (d) D-fructose and D-glucose The best I can EXPLAIN: HYDROLYSIS of sucrose yields D-fructose and D-glucose.

Discussion

Explore topic-wise InterviewSolutions in .

Dextrin hydrolysis yields ___________(a) D-galactose and D-glucose(b) 2-D-glucose(c) n-D-glucose(d) 2-D-fructoseI have been asked this question in semester exam.The doubt is from Feeder Pathways for Glycolysis topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry

Cleavage of Fructose 1, 6-biophosphate yields ___________(a) Two aldoses(b) Two ketoses(c) An aldose and a ketose(d) Only a ketoseI got this question in examination.Origin of the question is Glycolysis in section Principles of Bioenergetics and Glycolysis of Biochemistry

Gain of electrons can be termed as ___________(a) Metabolism(b) Anabolism(c) Oxidation(d) ReductionThe question was asked during an online exam.I'd like to ask this question from Biological Oxidation-Reduction Reactions topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry

Which out of the following has the highest redox potential?(a) NAD(b) FMN(c) FAD(d) O2The question was posed to me in an internship interview.The origin of the question is Biological Oxidation-Reduction Reactions topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry

Which of the following is not an important precursor of glucose in animals?(a) Lactate(b) Pyruvate(c) Glycerol(d) Glucose 6-phosphateThe question was asked in class test.This key question is from Gluconeogenesis in section Principles of Bioenergetics and Glycolysis of Biochemistry

Maltose hydrolysis yields ___________(a) D-galactose and D-glucose(b) 2-D-glucose(c) n-D-glucose(d) 2-D-fructoseI have been asked this question in class test.I need to ask this question from Feeder Pathways for Glycolysis topic in division Principles of Bioenergetics and Glycolysis of Biochemistry

The phosphate groups used during glycolysis are ____________(a) Organic(b) Inorganic(c) Neutral(d) NoneThis question was posed to me in unit test.My doubt is from Phosphoryl Group Transfers and ATP topic in chapter Principles of Bioenergetics and Glycolysis of Biochemistry