Practice Test

Q1) While a muscle is in the process of reducing an oxygen debt: Show Answer

Q2) NAD functions in cell respiration as a (an): Show Answer

Q3) Which of the following statements about oxidative phosphyorylation is not true? Show Answer

Q4) Transfer of energy in animal cell is in the form of: Show Answer

Q5) The end products of Kerb's cycle are: Show Answer

Q6) Acetyl Co-A combines with which of the following compounds to form citric acid: Show Answer

Q7) Oxidative phosphorylation is formation of: Show Answer

Q8) In the process of respiration the potential energy stored in organic compounds is released in the form of: Show Answer

Q9) Glycolysis operates in: Show Answer

Q10) Respiratory Quotient (R.Q.) is ratio of: Show Answer

Q11) In anaerobic respiration the end product is: Show Answer

Q12) Energy rich compound produced in respiration is: Show Answer

Q13) Which mineral acts as an activator in isocitric acid dehydrogenase enzyme in Kerb's cycle? Show Answer

Q14) During complete aerobic respiration how many ATP are gained in prokaryotes? Show Answer

Q15) In proteins R.Q. value is: Show Answer

Q16) The inner membranes of mitochondria and chloroplasts: Show Answer

Q17) R. Q. is found to be always unity in: Show Answer

Q18) How many ATP are produced during anaerobic respiration? Show Answer

Q19) If naked pea seeds are kept in four respiratory flasks then they would germinate best if flask contains: Show Answer

Q20) What is the link in glycolysis and Kerbs' cycle? Show Answer

Q21) Name the scientist who found how the energy of glucose was released in aerobic respiration: Show Answer

Q22) In glycolysis the net gain is two ATP molecules and two molecules of are released: Show Answer

Q23) The series of reactions in TCA cycle takes place in: Show Answer

Q24) In the Krebs' cycle, citric acid is activated by: Show Answer

Q25) In the TCA cycle the acid to react with acetyl coenzyme A is: Show Answer

Q26) Oxidative phosphorylation is the synthesis of: Show Answer

Q27) Glucose is converted into pyruvic acid through a series of reactions with a net gain of: Show Answer

Q28) The maximum rate of respiration in many plants of the tropics can be observed in the range of: Show Answer

Q29) In woody stems respiration takes place through: Show Answer

Q30) During ATP synthesis electrons pass through: Show Answer

Q31) The substrate for photorespiration is: Show Answer

Q32) Where does ATP synthesis occur? Show Answer

Q33) The function of cellular respiration is to: Show Answer

Q34) The function of mitochondrial cristae is to: Show Answer

Q35) The number of molecules of pyruvic acid formed from one moleculs of glucose at the end of glycolysis is: Show Answer

Q36) Oxidative phosphorylation takes place on: Show Answer

Q37) Which among the following is the most appropriate reason for storing green coloured apples at low temperature? Show Answer

Q38) The other name of Glycolysis is: Show Answer

Q39) When a cell absorbs energy from the environment, the reaction can be: Show Answer

Q40) Importance of Krebs' cycle is: Show Answer

Q41) ATP is: Show Answer

Q42) Which of the following is not true of glycolysis? Show Answer

Q43) When a yeast is producing wine, which of the following is not produced? Show Answer

Q44) In the conversion of pyruvic acid to acetyl CoA, pyruvic acid is: Show Answer

Q45) Function of coenzyme A is to: Show Answer

Q46) Largest amount of phosphate bond energy is produced in the process of respiration during: Show Answer

Q47) The process of respiration which result in the formation of pyruvic acid is: Show Answer

Q48) Pyruvic acid is formed during: Show Answer

Q49) Which of the following processes make direct use of oxygen? Show Answer

Q50) How many carbon atoms are in an oxaloacetic acid molecule, which joins with an acetyl group during step I of Kerbs' citric acid cycle? Show Answer

Q51) At the end of the Kerbs' citric acid cycle, most of the energy removed from glucose molecule has been transferred to: Show Answer

Q52) In ETS, the final acceptor of protons is: Show Answer

Q53) The atom within each cytochrome molecule that actually accepts and release electrons is: Show Answer

Q54) Oxygen which forms part of the ETS, enters the mitochondrion as atom in: Show Answer

Q55) Fatty acids enter cellular respiration as: Show Answer

Q56) Within the mitochondrion, the proton gradient develops across the: Show Answer

Q57) Which is true for glycolysis under aerobic condition? Show Answer

Q58) Which is not true for TCA cycle when one acetyl group is oxidized? Show Answer

Q59) An organism which does not produce water as waste of respitratory process is likely to be: Show Answer

Q60) A high concentration of oxygen above 25%: Show Answer

Q61) It is not advisable to sleep under the trees at night because: Show Answer

Q62) Only ATP releasing step in Kerbs' cycle is: Show Answer

Q63) Which of these is not true for fermentation? Show Answer

Q64) Protein rich pulses have R.Q. equal to: Show Answer

Q65) Mineral activator needed for the enzyme carboxylase of TCA cycle is: Show Answer

Q66) Which of the following leaves will show maximum rate of respiration? Show Answer

Q67) Respiration in methane forming bacteria and de-nitrifying bacteria is: Show Answer

Q68) Which of the following respires anaerobically? Show Answer

Q69) A molecule of ATP is formed when electron passes from: Show Answer

Q70) Most of energy is supplied by mitochondria through: Show Answer

Q71) Which is the link between glycolysis and Kerbs' cycle: Show Answer

Q72) The end products of fermentation are: Show Answer

Q73) In eukaryotes net gain of ATP in complete oxidation of one molecule of glucose is: Show Answer

Q74) In ETS, which is the cytochrome that reacts with oxygen? Show Answer

Q75) Anaerobic respiration was reported for the first time by: Show Answer

Q76) Which of the following observations most strongly support the view that mitochondria contain electron-transfer enzymes aggregated into compact associations? Show Answer

Q77) Maximum energy becomes available per mole of gulcose when it is metabolised through: Show Answer

Q78) Anaerobic respiration is also called: Show Answer

Q79) Anaerobic respiration of yeast produces: Show Answer

Q80) Metabolism of one palmitic acid yields ATP: Show Answer

Q81) Alcoholic fermentation is carried out by: Show Answer

Q82) Cytochrome is: Show Answer

Q83) In case of Kerbs cycle, the pyruvic acid before combining with oxaloacetic acid is converted to: Show Answer

Q84) Which of the following receives electrons at the end of ETC? Show Answer

Q85) What is the total production of ATP at the end of complete breakdown of one molecule of glucose during aerobic respiration? Show Answer

Q86) Respiration in germinating seeds is usually high but with decline in water and maturation the rate of respiration: Show Answer

Q87) Mechanism of aerobic respiration was discovered by: Show Answer

Q88) Dough kept overnight in warm place becomes soft and spongy due to: Show Answer

Q89) In glycolysis, electrons are removed by: Show Answer

Q90) Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on: Show Answer

Q91) The overall goal of glycolysis, Kerbs cycle and the electron transport system is the formation of: Show Answer

Q92) Which one of the following mammalian cells is not capable of metabolising glucose to carbon-dioxide aerobically? Show Answer

Q93) One molecule of glucose on complete oxidation releases how much energy? Show Answer

Q94) When two molecules of Tripalmitin are used as a respiratory substrate the RQ is: Show Answer

Q95) In plants glucose used as a repiratory substrate is derived from: Show Answer

Q96) During glycolysis, fructose 1,6 biphosphate is produced by the action of which enzyme? Show Answer

Q97) One molecule of ATP yield how much energy? Show Answer

Q98) How many molecules of ATP are produced directly from one molecule of glucose during glycolysis: Show Answer

Q99) In ETS, complex IV refers to: Show Answer

Q100) The end product of fermentation of sugars by Psuedomonas bacteria is: Show Answer

Q101) Dming respiration there is: Show Answer

Q102) R.Q. is less than one in succulent plants because of: Show Answer

Q103) Blood glucose level is not dependent upon muscle glycogen because of absence of: Show Answer

Q104) The importance of Krebs cycle is: Show Answer

Q105) Kreb's cycle start with the formation of a six carbon compound by the reaction between: Show Answer

Q106) Under glycolysis the pyruvic acid is reduced to lactic acid anaerobically in: Show Answer

Q107) Which of the following occurs only under aerobic conditions? Show Answer

Q108) We get major supply of energy from glucose in: Show Answer

Q109) In animal cells, first phase in breakdown of glucose is: Show Answer

Q110) Which of the following statements is/are not true?
(a) one ATP molecule yields 32 kJ energy
(b) pentose phosphate pathway was discovered by Dickens
(c) when tripalmitin is used as a substrate, the R.Q. is 0.7
(d) energy relased by one molecule of glucose on complete oxidation corresponds to 1292 kJ. Show Answer

Q111) In the electron transport system present in the inner mitochondrial membrane, complexes I and IV are respectively Show Answer

Q112) In respiration incomplete oxidation of glucose is done under Show Answer

Q113) The cellular respiration first takes place in the Show Answer

Q114) Which of the following scientist has given the scheme of glycolysis? Show Answer

Q115) Which metabolic pathway is a common pathway to both anaerobic and aerobic metabolism? Show Answer

Q116) TCA cycle enzymes are present in Show Answer

Q117) Among the following, identify the substrate required for the only oxidative reaction that occurs in the process of glycolysis. Show Answer

Q118) Aerobic respiration is Show Answer

Q119) What will happen, when glucose is administered orally? Show Answer

Q120) How many ATP molecules could maximally be generated from one molecule of glucose, if the complete oxidation of one mole of glucose to carbon dioxide and water yields 686 kcal and the useful chemical energy available in the high energy phosphate bond of one mole of ATP is 12 kcal? Show Answer

Q121) Plants does not need specialised respiratory organ because Show Answer

Q122) In which part of mitochondria does ATP synthesis occur? Show Answer

Q123) In oxidative decarboxylation, enzyme used to Show Answer

Q124) Select the wrong statement. Show Answer

Q125) Enzymes found attached to inner membrane of mitochondria instead of matrix is/are Show Answer

Q126) Four respiratory enzymes are given below. Arrange them in increasing order of the carbon number of the substrates on which they act.
I. Enolase
II. Aconitase
III. Fumarase
IV. Alcohol Dehydrogenase Show Answer

Q127) Link enzyme in cellular respiration is Show Answer

Q128) Beer and butter milk are products of fermentation by Show Answer

Q129) Acetyl Co-A binds to oxaloacetic acid to form Show Answer

Q130) Last electron acceptor in respiration is Show Answer

Q131) Glucose break down takes place ….. in fermentation Show Answer

Q132) Plants need one of the following for ATP formation Show Answer

Q133) Fate of pyruvic acid during aerobic respiration is Show Answer

Q134) In respiration, respiratory substances can be used Show Answer

Q135) In oxidative decarboxylation, only a carbon molecule of pyruvic acid is get oxidised, other two carbon molecule goes to form Show Answer

Q136) Fungi are dependent on dead and decaying matter for feeding, it is called Show Answer

Q137) Which of the following reaction does not take place in the cell organelle, that is referred to as ‘Power house of the cell’? Show Answer

Q138) All enzymes of TCA cycle are located in the mitochondrial matrix except one, which is located in inner mitochondrial membranes in eukaryotes and in cytosol in prokaryotes. This enzyme is Show Answer

Q139) The enzymes for TCA cycle are present in Show Answer

Q140) In electron transport system, which of the following acts as a final hydrogen acceptor Show Answer

Q141) If a starving plant is provided with glucose, the rate of respiration would Show Answer

Q142) Which one is product of aerobic respiration? Show Answer

Q143) Decline in the activity of the enzyme Hexokinase by glucose-6-phosphate is caused by Show Answer

Q144) In which of the following reactions of glycolysis, oxidation takes place? Show Answer

Q145) During conversion of pyruvic acid into acetyl Co-A, pyruvic acid is Show Answer

Q146) Most of the biological energy is supplied by mitochondria through Show Answer

Q147) Chemiosmotic mechanism of ATP production in aerobic respiration was given by Show Answer

Q148) Respiratory enzymes are present in the following organelle Show Answer

Q149) An ATP molecule is structurally most similar to a molecule of Show Answer

Q150) Read the following and choose the option containing correct pair
I. DCMU Herbicide Inhibitor of non-cyclic electron transport
II. PMA Fungicide Reduce transpiration
III. Colchicine Alkaloid Causes male sterility
IV. Soilrite Sodium alginate Encapsulation of somatic embryos Show Answer

Q151) Oxidation of one molecule of NADH gives rise to Show Answer

Q152) In alcohol fermentation, Show Answer

Q153) In respiration breaking down of glucose with oxygen is known as Show Answer

Q154) Net gain of ATP molecules per hexose during aerobic respiration is Show Answer

Q155) Which of these are respiratory poisons or inhibitors of electron transport chain? Show Answer

Q156) Kreb’s cycle is completed with the formation of Show Answer

Q157) Where is ATP synthesised in glycolysis? Show Answer

Q158) Glycolysis takes place in Show Answer

Q159) Krebs’ cycle begins with the reaction Show Answer

Q160) In anaerobic respiration in plants Show Answer

Q161) The respiratory quotient (RQ) of some of the compounds are 4,1 and 0.7. These compounds are identified respectively as Show Answer

Q162) The enzyme ….. is used to catalysed when condensation of acetyl group with oxaloacetic acid and to yield citric acid Show Answer

Q163) The respiratory quotient (RQ) of a germinating castor seed is Show Answer

Q164) Glycolysis
I.causes partial oxidation of glucose (one molecule) to form 2-molecules of pyruvic acid and 2 ATP as net gain
II.takes place in all living cells
III.uses 2 ATP at two steps
IV.scheme was given by Gustav Embden, Otto Mayerhof and J Parnas
Choose the correct option containing appropriate statements from the above Show Answer

Q165) During oxidative phosphorylation, the net gain of ATP is Show Answer

Q166) Decarboxylation is involved in Show Answer

Q167) Alternate name of TCA cycle is Show Answer

Q168) A businessman of 80 kg weight requires 4800 kcal energy daily. How many ATP molecules and glucose molecules does he require to produce this much energy? Show Answer

Q169) Which one of the following pairs is wrongly matched? Show Answer

Q170) During the exercise, pyruvic acid is reduced to Show Answer

Q171) The compounds which are oxidised during respiration are known as Show Answer

Q172) Energy required for life processes is obtained by Show Answer

Q173) Choose the correct statement for the given options Show Answer

Q174) The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that adenosine triphosphate (ATP) is formed because Show Answer

Q175) The process by which there is inhibition of aerobic respiration by atmospheric oxygen is Show Answer

Q176) More carbon dioxide is evolved than the volume of oxygen consumed when the respiratory substrate is Show Answer

Q177) The main purpose of cellular respiration is to Show Answer

Q178) Which of the following substances yield less than 4 kcal/mol when its phosphate bond is hydrolysed? Show Answer

Q179) Five gram mole of glucose on complete oxidation releases Show Answer

Q180) NADP, NAD and FAD are acceptors of Show Answer

Q181) Which of following is connecting link between glycolysis and Krebs’ cycle? Show Answer

Q182) Which one of the following reactions is an example of oxidative Decarboxylation? Show Answer

Q183) Release of energy by breaking down of C-C bond of various organic molecules by oxidation process for cellular use is known as Show Answer

Q184) Krebs’ cycle was discovered by Krebs in pigeon muscles in 1940. Which step is called gateway step/link reaction/transition reaction in respiration? Show Answer

Q185) Correct sequence of electron acceptor of ATP synthesis is Show Answer

Q186) The number of ATP produced when a molecule of glucose undergoes fermentation Show Answer

Q187) Oxidative decarboxylation is Show Answer

Q188) Fermentation is Show Answer

Q189) Citric acid cycle is the alternate name of which of the following? Show Answer

Q190) When one molecule of glucose is completely oxidized during aerobic respiration, how many molecules of carbon dioxide are released due to Tricarboxylic acid cycle? Show Answer

Q191) The RQ value of oxalic acid is Show Answer

Q192) Energy currency of cell is Show Answer

Q193) Break down process is also called Show Answer

Q194) The energy-releasing metabolic process in which substrate is oxidized without an external electron acceptor, is called Show Answer

Q195) How many times ATP is utilised in glycolysis? Show Answer

Q196) Aerobic respiration takes place in Show Answer

Q197) Which of the following is a 4-carbon compound? Show Answer

Q198) An example of non-competitive inhibition is Show Answer

Q199) What is the net ATP molecules gain, when 4 molecules of glucose undergo anaerobic respiration in plant? Show Answer

Q200) Chemiosmosis hypothesis given by Peter Mitchell proposes the mechanism of Show Answer

Q201) Glycolysis Show Answer

Q202) Citric acid cycle is also known as Show Answer

Q203) Before entering into the respiratory pathway fats breakdown into Show Answer

Q204) In which of the following reactions of glycolysis, a molecule of water is removed from the substrate? Show Answer

Q205) The reactions of Pentose Phosphate Pathway (PPP) take place in Show Answer

Q206) In citric acid cycle first step is Show Answer

Q207) Which of the following substrate can enter into the respiration? Show Answer

Q208) RQ value of 4 may be expected for the complete oxidation of which one of the following? Show Answer

Q209) When act as a respiratory substrate, which of the following would be broken down to acetyl Co-A? Show Answer

Q210) Anaerobic respiration generally occurs in Show Answer

Q211) Cell respiration is carried out by Show Answer

Q212) The released energy obtained by oxidation is stored as Show Answer

Q213) Respiratory Quotient (RQ) is one in case of Show Answer

Q214) Which of the following substrates is used in the formation of alcohol? Show Answer

Q215) Which one is correct sequence in glycolysis? Show Answer

Q216) Common enzyme in glycolysis and pentose phosphate pathway is Show Answer

Q217) In the production of ethanol, pyruvic acid is first converted to acetaldehyde by the enzyme. Show Answer

Q218) The activity of succinate Dehydrogenase is inhibited by Show Answer

Q219) Citric acid is industrially best produced by Show Answer

Q220) Respiratory substrate are the organic substance which are ….. during respiration to liberate energy Show Answer

Q221) Preparatory phase before fermentation is Show Answer

Q222) For retting of jute the fermenting microbe used is Show Answer

Q223) The respiratory quotient during cellular respiration would depend on the Show Answer

Q224) Protein directly cannot be used as a respiratory substrate, it breaks down into Show Answer

Q225) Ethyl alcohol is commercially manufactured from Show Answer

Q226) Biological oxidation in Krebs’ cycle involves Show Answer

Q227) Last electron acceptor during ETS is Show Answer

Q228) Which enzyme converts glucose into alcohol? Show Answer

Q229) Glycolysis is a part of Show Answer

Q230) When tripalmitin is used as a substrate in respiration, the RQ is Show Answer

Q231) In anaerobic respiration bacteria produce Show Answer

Q232) During its formation, bread becomes porous due to release of Carbon dioxide by the action of Show Answer

Q233) Before entering respiratory pathway amino acids are Show Answer

Q234) The intermediate compound common for aerobic and anaerobic respiration is Show Answer

Q235) How many ATP molecules are obtained from fermentation of 1 molecule of glucose? Show Answer

Q236) During which stage in the complete oxidation of glucose are the greatest number of ATP molecules formed from ADP? Show Answer

Q237) In plants the cells in the interior parts are Show Answer

Q238) Ultimate source of energy in biosphere, is Show Answer

Q239) Dough kept overnight in warm weather becomes soft and spongy because of Show Answer

Q240) The respiratory quotient (RQ) or respiratory ratio is Show Answer

Q241) Maximum amount of energy/ATP is liberated on oxidation of Show Answer

Q242) Net yield of ATP molecules in aerobic respiration during Krebs’ cycle per glucose molecule is Show Answer

Q243) Respiratory quotient can very due to Show Answer

Q244) In anaerobic respiration the correct sequence of catabolism of glucose is Show Answer

Q245) In eukaryotes, photosynthesis occurs in Show Answer

Q246) In yeast during anaerobic respiration, how many glucose molecules are required for production of 38 ATP molecules? Show Answer

Q247) Which of the following is involved in the catalysis of link reaction during aerobic respiration? Show Answer

Q248) Choose the correct combination of A and B in accordance with the NCERT text book.The NADH synthesised in …A… is transferred into the mitochondria and undergoes oxidative …B… Show Answer

Q249) Total gain of ATP molecules during aerobic respiration of one molecule of glucose Show Answer

Q250) Which of the following enzyme is responsible for formation of glucose from glucose-6-phosphate? Show Answer

Q251) Alcoholic fermentation takes place in the presence of Show Answer

Q252) Which of these steps in Krebs’ cycle indicates substrate level phosphorylation? Show Answer

Q253) The main purpose of electron transport chain is to Show Answer

Q254) How many ATP are formed during the citric acid cycle? Show Answer

Q255) RQ is always less than one in Show Answer

Q256) In glycolysis from glucose to pyruvic acid involves more than seven reaction. Each individual reaction needs Show Answer

Q257) Which one is true for ATP? Show Answer

Q258) Oxidative phosphorylation refers to Show Answer

Q259) Which one is not correct about Krebs’ cycle? Show Answer

Q260) Which specialised cell provides interconnectivity for air spaces? Show Answer

Q261) Steps of respiration are controlled by Show Answer

Q262) The process by which ATP is produced in the inner membrane of a mitochondrion, the electron transport system transfers protons from the inner compartment to the outer, as the protons flow back to the inner compartment, the energy of their movement is used to add phosphate to ADP, forming ATP is Show Answer

Q263) If RQ is 0.6 in a respiratory metabolism, it would mean that Show Answer

Q264) A scientist added a chemical (cyanide) to an animal cell to stop aerobic respiration. Which of the following is most likely to have been affected by this treatment? Show Answer

Q265) Wine and beer are produced directly by fermentation. Brandy and whisky require both fermentation and distillation because Show Answer

Q266) For gaseous exchange plants have Show Answer

Q267) Citric acid cycle was discovered by Show Answer

Q268) Vitamin-C was the first vitamin to be produced by a fermentation process using Show Answer

Q269) Net gain of ATP from one molecule of glucose in glycolysis, is Show Answer

Q270) In Krebs’ cycle, GTP is formed in Show Answer

Q271) The net gain of ATP from complete oxidation of one molecule of glucose in eukaryote is Show Answer

Q272) Animals are Show Answer

Q273) During Kreb’s cycle of …A… NADH, …B… ATP is produced through ETS in mitochondria. Choose, the correct pair from the option given below Show Answer

Q274) Product of glycolysis is Show Answer

Q275) Electron Transport System (ETS) occurs in Show Answer

Q276) In aerobic respiration, citric acid cycle takes place in Show Answer

Q277) If RQ is less than 1.0 in a respiratory metabolism, it would mean that Show Answer

Q278) Calorie is the unit of Show Answer

Q279) Which of the following organism is useful in the preparation of Roquefort cheese? Show Answer

Q280) What is the correct order of the stages of cellular respiration? Show Answer

Q281) The term glycolysis has originated from the Greek word ….. and …. Show Answer

Q282) The organelle associated with aerobic respiration is Show Answer

Q283) Incomplete breakdown of sugar in anaerobic respiration forms Show Answer

Q284) The total energy trapped per gm mole of glucose is 1292 kJ with on efficiency of Show Answer

Q285) Phase common in aerobic and anaerobic respiration is Show Answer

Q286) Synthesis process in organism is also called Show Answer

Q287) Which of the following process takes place in mitochondria? Show Answer

Q288) How much percentage of energy is released during lactic acid and alcoholic of fermentation? Show Answer

Q289) Calculation of ATP gain for every glucose is made on certain assumptions. Choose the correct option in accordance with the statement given above Show Answer

Q290) Sucrose is converted into Show Answer

Q291) Which of the following respiratory substrates requires the highest number of oxygen molecules for its complete oxidation? Show Answer

Q292) The metabolic pathway through which the electron passes from one carrier to another is called Show Answer

Q293) In which one of the following options, the two names refer to one and the same thing? Show Answer

Q294) The complete combustion of glucose in respiration is represented by Show Answer

Q295) The overall goal of glycolysis, Krebs’ cycle and the electron transport system is the formation of Show Answer