14 RESPIRATION IN PLANTS QUESTIONS
Respiration is defined as –
A) Formation of C – C bonds of complex compound
B) Breaking of C – C bonds of complex compound
C) Breaking of C – N bonds of complex compound
D) All of the above
Respiration results finally to a formation and release of which among the following?
A) NADPH
B) Glucose
C) ATP
D) Both A & C
The C – C bond of complex compound in broken by which process in respiration?
A) Oxidation
B) Reduction
C) Hydrogenation
D) None of the above
Assertion – ATP act as energy currency of cell.
Reason – Energy released through respiration is trapped as bio-chemical energy in the form of ATP.
A) Only Assertion is correct
B) Only Reason is correct
C) Both Assertion and Reason is correct
D) Both Assertion and Reason is wrong
Which among the following is wrong?
i) Only carbohydrates are oxidised to release energy in the process of respiration.
ii) Energy produced in respiration is not released in a single step.
iii) ATP can be broken down, as and when energy needs to be utilised.
A) Only ii
B) Only iii
C) Only i
D) None of the above
ATP stands for?
A) Adenosine 3′ – triphosphate
B) Adenosine – 3′ – trio phosphite
C) Adenosine 5′ – triphosphate
D) Adenosine 5′ – triophosphite
Compounds that are oxidised during the process of respiration is called?
A) Respiratory index
B) Reductory substrate
C) Respiratory quotient
D) Respiratory substrate
Statement I – Only green plants and cyanabacteria can prepare their own food by photosynthesis.
Statement II – Only green plants and cyanobacteria can prepare their own food by converting chemical energy to light energy
Which of the statements is/are true ?
A) Only I
B) Only II
C) Both of these
D) None of these
“Ultimately all the food that is respired for life processes comes from photosynthesis.”
The above statement is –
A) correct
B) incorrect
C) partially correct
D) can’t be said as it is incomplete
Which of the following cannot be used as respiratory substances in plants under any conditions?
A) fat
B) protein
C) carbohydrate
D) none of these
What are the byproducts of Respiration process?
A) Oxygen
B) Water
C) Carbon dioxide
D) Both B and C
Respiration is a ________ process.
A) Anabolic
B) Catabolic
C) Both Anabolic as well as catabolic
D) None of the above
Choose the correct equation-
A) C6H12O6 + 12O2 → 6H2O + 6H2O + Energy
B) C6H12O6 + 3O2 → 2CO2 + 3H2O + Energy
C) C6H12O6 + 6CO2 + 6H2O + Energy
D) C6H12O6 + 6O2 → 6CO2 + 6H2O + Energy
Respiration organs for plants are-
A) Lenticels
B) Stomata
C) Woody Bark
D) Both of the above A and B
Which among the following is wrong?
A) Roots, Leaves and Stem respire a for lower than animal do
B) For plants to respire, availability of O2 is a problem as O2 is not released within the cell during photosynthesis
C) There is very little transport of gases from one plant part to another
D) None of the above
Glycolysis is originated from-
A) Latin word
B) French word
C) Italian word
D) Greek word
Meaning of glycolysis is-
A) Splitting of water
B) Splitting of sugar
C) Splitting of fat
D) Splitting of protein
Glycolysis is also known as ________ pathway.
A) ETS
B) EMP
C) ENP
D) ELP
The scheme of glycolysis was given by-
A) Gustav Embden
B) Otto Meyerhof
C) J. Parnas
D) All of the above
The scheme of glycolysis was given by-
A) Gustav Embden
B) Alto Meyerhof
C) J. Parnas
D) All of the above
Glycolysis occurs in which among the following?
A) Aerobic organism
B) Anaerobic organism
C) Eukaryotes
D) All of the above
Sucrose is converted to __(i)__ and __(ii)__ using enzyme __(iii)__
(i) |
(ii) |
(iii) |
| A) Glucose | Glucose | Hexokinase |
| B) Glucose | Fructose | Hexokinase |
| C) Glucose | Glucose
|
Invertase |
| D) Glucose
|
Fructose | Invertase |
What is the isomerised produce of glucose – 6 – phosphate in the steps of glycolysis?
A) Fructose 1, 6 – bisphosphate
B) Fructose –6 – phosphate
C) Fructose –1, 3, 6 – triphosphate
D) Fructose –3 – phosphate
Glycolysis is a how many steps of process?
A) Ten
B) Eight
C) Eleven
D) Five
End product of glycolysis is?
A) Pyruvate
B) Phenol
C) Prusic acid
D) Phosphoenolpyruvate
ATP is utilised in which steps of glycolysis.
i) Conversion of BPGA to PGA
ii) Conversion of glucose into glucose – 6– phosphate
iii) Conversion fructose 6 – phosphate to fructose 1, 6 – bisphosphate
iv) Conversion of PEP to pyruvate
A) Only i
B) Only iii
C) Both ii and iii
D) Only ii, iii, iv
One molecule of glucose is converted into how many molecules of pyruvic acid?
A) 1
B) 2
C) 3
D) 4
When PGAL is converted into BPGA in process of respiration there is formation of?
A) 1 molecule of ATP
B) 1 molecule of H2O
C) 1 molecule of NADH + H+
D) 1 molecule of ADP
PGAL get ________ and get converted to BPGA?
A) reduced
B) hydrolysed
C) oxidized
D) all of these
Conversion of 2-phosphoglycerate to phosphoenolpyruvate leads of formation of?
A) ATP
B) NADH2
C) H2O
D) ADP
What does PGAL stands for?
A) 3 – Phosphoglyceraldehyde
B) 5 – Phosphoglyceraldehyde
C) 3 – Phosphoglyceric acid
D) 5 – Phosphoglyceric acid
What is the full form of PEP?
A) Pyroenol pyruvate
B) Pyruvic pyruvate
C) Phosphoenolpyruvate
D) None of the above
Pyruvic acid is composed of how many carbon atom?
A) Two
B) Three
C) Four
D) Five
Which among the following step in glycolysis yields energy?
i) Conversion of BPGA to PGA
ii) Conversion of fructose – 6 –phosphate to fructose 1, 6 –bisphosphate
iii) Conversion of PEP to pyruvic acid
iv) Conversion of glucose – 6 –phosphate to fructose – 6 – phosphate
A) Both ii and iv
B) i, ii, iii
C) Both i and iii
D) All of the above
In glycolysis, fructose 1, 6 – bisphosphate get split into which of the following?
A) PGAL and BPGA
B) Glyceraldehyde – 3 – phosphate and 3 – phosphoglyceric acid
C) Glyceraldehyde – 3 – phosphate and Dihydroxy acetone phosphate
D) None of the above
What is the net gain of ATP from one molecule of glucose in one complete glycolysis?
A) 4
B) 3
C) 5
D) 2
How many ATP are utilized in complete process of glycolysis of one glucose molecule?
A) 2
B) 1
C) 3
D) 4
How many molecules of NADH are produced in one complete process of glycolysis of one glucose molecule?
A) 1
B) 2
C) 3
D) 4
How many molecules of ATP are directly produced in one complete glycolysis of one glucose molecule?
A) 1
B) 2
C) 3
D) 4
Which among the following are correct about Glycolysis?
i) It is the only process that occurs in anaerobes for oxidation of glucose.
ii) Glucose undergoes complete oxidation to form pyruvic acid.
iii) At the end, there is a net gain of 4 ATP and 2 NADH.
A) Only ii
B) Both ii and iii
C) Only i
D) all of the above
For further complete oxidation of glucose, pyruvic acid enters to which among the following?
A) ETS
B) Kreb’s cycle
C) EMP pathway
D) None of the above
Fermentation occurs when there is
A) Complete supply of oxygen
B) No supply of oxygen
C) Complete supply of water
D) No supply of water
In alcoholic fermentation, pyruvate is converted to which among the following?
A) Ethanol, CO2, NADH
B) CO2 and Methanol
C) CO2 and Ethanol only
D) CO2 and Carboxylic acid
Which enzyme is responsible for alcoholic fermentation?
A) Pyruvic acid decarboxylase
B) Lactate dehydrogenase
C) Alcohol dehydrogenase
D) More than one option is correct
Which enzyme is involved in lactic acid fermentation?
A) Pyruvic acid decarboxylase
B) Lactate dehydrogenase
C) Alcohol dehydrogenase
D) More than one option is correct
Choose the correct option
In the fermentation process:-
i) Oxidation of ADP to ATP takes place
ii) Reduction of ATP to ADP takes place
iii) Reducing agent NADH + H+ is reoxidised to NAD+
iv) Formation of NADH + H+ takes place by oxidation
A) ii and iv
B) ii and iii
C) Both i and iii
D) Only iii
How many statements are correct about fermentation?
i) Very low amount of energy is released, < 7% of energy in glucose is released in fermentation
ii) In animal cells, when oxygen is inadequate acetic acid is formed during respiration
iii) It is dangerous process as it leads to acid and alcohol formation.
A) 0
B) 1
C) 2
D) 3
The range beyond which yeasts poison themselves to death in alcohol fermentation when the concentration of alcohol reaches to?
A) 13%
B) 15%
C) 12%
D) 17%
Which among the following is the processes steps in, complete cellular respiration which don’t need oxygen molecule (O2)?
A) Glycolysis
B) Tricarboxylic acid cycle
C) ETC
D) Both A and B
Complete the following reaction-
Pyruvic acid + (i) + NAD+ Acetyl COA +(iii) + NAD + H+
A) (i) O2 (ii) Mg2+ (iii) CO2 B) (i) O2 (ii) Na+ (iii) H2O
C) (i) CoA (ii) Na+ (iii) CO2 D) (i) CoA (ii) Mg2+ (iii) CO2
Pyruvate enters to the mitochondrial matrix and undergoes.
A) Reductive decarboxylation
B) Oxidative carboxylation
C) Reductive carboxylation
D) Oxidative decarboxylation
Which enzyme catalyse the reaction going on in mitochondrial matrix in respiration?
A) Pyruvate carboxylase
B) Lactate dehydrogenase
C) Alcohol dehydrogenase
D) Pyruvate dehydrogenase
Who elucidated Tricarboxylic Acid cycle?
A) Johns Elen
B) Hans Krebs
C) Meyerhoff
D) Elena Parker
Formation of Acetyl coenzyme A from Pyruvate in mitochondrial matrix yields which among the following?
A) CO2
B) H2O
C) NADPH + H+
D) Both A and C
How many molecules of NADH + H+ are produced when pyruvate converts to Acetyl CoA in TCA cycle?
A) 0
B) 1
C) 2
D) 3
Where does TCA cycle occurs?
A) Cytoplasm
B) Mitochondria cell wall
C) Mitochondrial matrix
D) Chloroplast
What is the first product of TCA cycle?
A) Acetyl CoA
B) Citric acid
C) Isocitric acid
D) OAA
What is the 1st step of TCA cycle?
A) Formation of citrate from isocitrate
B) Formation of citrate from the acetyl coenzyme A
C) Formation of citrate from decarboxylation of succinic acid
D) None of the above
Which enzyme catalyses the first step of TCA cycle?
A) Citrate Synthase
B) Citrate Reductase
C) Citrate Oxidase
D) None of the above
What is the first member of TCA cycle that accepts Acetyl CoA?
A) Citrate
B) CoA
C) Oxaloacetic acid
D) Both A and C
Which among the following is synthesized during the conversion of succinyl – CoA to succinic acid in TCA cycle?
A) FADH2
B) GTP
C) NADH2
D) ATP
How many total CO2 molecule are released from Pyruvate to completion of TCA cycle?
A) 0
B) 1
C) 2
D) 3
How many total NADH2 are produced from pyruvate to completion of TCA cycle?
A) 2
B) 3
C) 4
D) 5
How many FADH2 are produced in TCA cycle?
A) 1
B) 2
C) 3
D) 4
One molecule of glucose synthesizes how many molecules of NADH + H+ at the end of TCA cycle?
A) 6
B) 7
C) 8
D) 10
How many molecules of FADH2 are yielded from one glucose molecule at the end of TCA cycle?
A) 1
B) 2
C) 3
D) 4
How many net ATP molecules are directly yielded from complete oxidation of one glucose (including ATP of TCA)?
A) 4
B) 2
C) 3
D) 8
Which among the following is wrong?
(i) Glycolysis occurs in all living organism.
(ii) TCA cycle and ETS only occurs in aerobes.
(iii) Complete oxidation of pyruvate occurs by removal of all hydrogen atom in TCA cycle.
A) (i)
B) (ii)
C) (iii)
D) None of the above
ETS occurs in which place?
A) Outer membrane of mitochondria
B) Cytoplasm
C) Inner membrane of mitochondria
D) Matrix of mitochondria
Energy stored in NADH + H+ FADH2 are released in ETS through ________.
A) Reduction of these molecules
B) Oxidation of these molecules
C) Hydrolysis of these molecules
D) Both A & B
ETS stands for
A) Electrical Transport System
B) Electron Transmission System
C) Electron Transport System
D) None of the above
When the electrons are passed onto O2 in ETS it leads to formation of what?
A) CO2
B) ATP
C) H2O
D) NADH + H+
Ubiquinone is located at ________.
A) inner membrane of mitochondria
B) outer membrane of mitochondria
C) inner membrane of nucleus
D) outer membrane of nucleus
Ubiquinone receives electrons from which of the following?
i) From NADH produced in mitochondrial matrix during TCA.
ii) From FADH2 produced during oxidation of succinate in TCA.
A) Only i
B) Only ii
C) Both i and ii
D) None of the above
Electrons from NADH produced during TCA are oxidised by which enzyme?
A) NAD+ hydrogenase
B) NADH dehydrogenase
C) NAD+ hydroxylase
D) NADH dehydroxylase
The reduced ubiquinone are also called what?
A) Ubiquinate
B) Ubiquinase
C) Ubiquinal
D) Ubiquinol
Cytochrome c is ________?
A) Lipid
B) Carbohydrate
C) Protein
D) Fat
What is the function of cytochrome c?
A) Act as donor of electron
B) Passage for movement of e-
C) Act as a receptor of e- between complex II and III
D) Act as a mobile carrier for e- transfer between complex III and IV
What does cytochrome c oxidase complex contains?
A) Cytochrome a
B) Cytochrome a3
C) Two copper centres
D) All of the above
When e- passes from complex I to IV in ETS they are coupled to ________ for ATP production from ADP.
A) Cytochrome c
B) Cytochrome bc1
C) ATP synthase
D) Both A and B
Oxidation of one molecule of NADH2 produces how many molecules of ATP?
A) 1
B) 2
C) 3
D) 4
Oxidation of 2 molecule of FADH2 produces how many molecules of ATP?
A) 1
B) 2
C) 3
D) 4
Which among the following is the role of O2 in whole respiration process?
i) Act as hydrogen removal from the system.
ii) Act as final hydrogen acceptor.
iii) It bond with C atom and released CO2, one of the byproduct of respiration.
A) ii and iii
B) iii only
C) Both i and ii
D) All of the above
ETS of respiration process is called
A) Reductive phosphorylation
B) Oxidative phosphorylation
C) Oxidative photophosphorylation
D) Both B and C
Which among the following is wrong about ATP synthase?
i) It is also called complex V.
ii) This is used to synthesis ATP by utilising the energy released during ETS.
iii) It works on the basis of proton gradient.
iv) It consist of two major components, F1 and F0.
A) Only ii
B) Both i and iii
C) i and iv
D) None of the above
What is F1 in ATP synthase?
A) It contain a site for protein synthesis.
B) It contain a site for ADP synthesis from ATP.
C) It contain a site for ATP production from ADP.
D) It act as a channel through which proton cross the inner membrane.
What is the role of F0 in ATP synthase?
A) It act as a channel through which ecrosses the inner membrane.
B) It act as a channel through which proton crosses the inner membrane.
C) It act as a mobile protein carrier of electron across the inner membrane.
D) Acts as site for ATP synthesis
For each ATP produced, ________ passes through F0 from intermembrane space to the matrix down the electrochemical proton gradient.
A) H+
B) 2H+
C) 3H+
D) 4H+
What is the net gain of ATP molecules during aerobic respiration of one glucose molecule?
A) 40 ATP
B) 38 ATP
C) 36 ATP
D) 34 ATP
Match the following
1 Glycolysis i Mitochondrial matrix
2 TCA ii Cytoplasm
3 ETC iii Inner membrane of mitochondria
A) 1-i, 2-ii, 3-iii
B) 1-ii, 2-i, 3-iii
C) 1-iii, 2-ii, 3-I
D) 1-ii, 2-iii, 3-i
The respiratory balance sheet is calculated on some assumptions.
Which of the following assumption is correct?
A) The pathway is sequential, with series of glycolysis, ETS and TCA cycle in the
same order for a given molecule.
B) NADH is transferred to chloroplast where oxidative phosphorylation occurs, leading to formation of 3 ATP
C) Only glucose is the substrate and none other substrate or intermediate enters or leaves the pathway
D) None of these
In the balance sheet of fermentation, net gain is –
A) 12 ATP molecules
B) 38 ATP molecules
C) 2 ATP molecules
D) 8 ATP molecules
Oxidation of NADH to NAD+ is –
A) Slower in fermentation than aerobic respiration
B) Faster in fermentation than aerobic respiration
C) Equal in fermentation and aerobic respiration
D) Cannot be compared
Which among the following is wrong?
i) Other than glucose, no other substrates can be used in respiratory process.
ii) Respiratory pathway is an amphibolic pathway.
iii) Different substrates enters at different stage in respiratory pathway.
A) Only i
B) Only iii
C) Only ii
D) Both i and ii
Which among the following is wrong?
i) Other than glucose, no other substrates can be used in respiratory process.
ii) Respiratory pathway is an amphibolic pathway.
iii) Different substrates enters at different stage in respiratory pathway.
A) Only i
B) Only iii
C) Only ii
D) Both i and ii
Fats as a respiratory substrate converts to which compound first?
A) Dihydroxy Aceton Phosphate
B) Glycerol
C) Fatty acid
D) Both B and C
Match the following-
1 Amino acids i Pyruvic acid
2 Fatty acid ii Dihyroxy Acetone Phosphate
3 Glycerol iii Acetyl CoA
A) 1-i, 2-iii, 3-ii
B) 1-ii, 2-i, 3-iii
C) 1-iii, 2-i, 3-ii
D) 1-ii, 2-iii, 3-i
Choose the correct according to the correct sequence (from substrate to end product)
i) Glucose 6 – phosphate ii) Pyruvic acid
iii) Carbohydrate iv) Fructose–1, 6-bisphosphate
v) Glucose vi) Dihydroxy Acetone Phosphate ⇄ Glyceraldehyde 3 – phosphate
A) i, iii, iv, v, vi, ii
B) iii, iv, v, ii, i, vi
C) iii, v, i, ii, iv, vi
D) iii, v, i, iv, vi, ii
Which statement is true about RQ?
i) It is also called respiratory ratio.
ii) It is the volume of O2 released over the volume of CO2 evolved during respiration.
iii) RQ of diff. substrate is different.
A) Only i
B) Only iii
C) Both i and iii
D) All of the above
Choose the correct.
A) RQ = volume of CO2 evolved/volume of O2 consumed
B) RQ = volume of O2 consumed/volume of CO2 evolved
C) RQ = volume of O2 evolved/volume of CO2 consumed
D) None of the above
What will be the RQ for the following equation
2(C31H28𝑂6) + 145 O2 → 102 CO2 + 98 H2O + Energy
A) 0.9
B) 1
C) 0.8
D) 0.7
What is RQ if proteins are used as a respiratory substrate?
A) 1
B) 0.8
C) 0.9
D) 0.7
What is RQ if carbohydrates are used as a respiratory substrate?
A) 1
B) 0.8
C) 0.7
D) 0.9
Match the following-
1) NADH + H+ i) 1 ATP
2) FADH2 ii) 2 ATP
3) GTP iii) 3 ATP
A) 1-i, 2-ii, 3-iii
B) 1-i, 2-iii, 3-ii
C) 1-iii, 2-ii, 3-i
D) 1-ii, 2-i, 3-iii
In ETS O2 accept the electrons and get reduced to which of the following?
A) Water
B) Carbon dioxide
C) Palmitic acid
D) None of the above
What is the final end product of TCA cycle?
A) 3 NADH + H+
B) 1 ATP
C) 1 FADH2
D) All of the above
How many ATPs are produced through ETS only from 1 molecule of 3-phosphoglycerate in aerobic respiration
A) 12
B) 14
C) 16
D) 15
What is the role of NAD+ in cellular respiration?
(a) It functions as an enzyme.
(b) It functions as an electron carrier.
(c) It is the final electron acceptor for anaerobic respiration.
(d) It is a nucleotide source for ATP synthesis.
Which of these statements is incorrect?
(a) Enzymes of TCA cycle are present in mitochondrial matrix.
(b) Glycolysis occurs in cytosol.
(c) Oxidative phosphorylation takes place in outer mitochondrial membrane.
(d) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
Phosphoenol Pyruvate (PEP) is the primary CO2 acceptor in ___+_______.
(a) C4 plants
(b) C2 plants
(c) C3 and C4 plants
(d) C3 plants
Which statement is wrong for Krebs’ cycle?
(a) There is one point in the cycle where FAD+ is reduced to FADH2.
(b) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised.
(c) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid.
(d) There are three points in the cycle where NAD+ is reduced to NADH + H+.
In which one of the following processes CO2 in not released?
(a) Aerobic respiration in plants.
(b) Aerobic respiration in animals.
(c) Alcoholic fermentation.
(d) Lactate fermentation.
Respiratory Quotient (RQ) value of tripalmitin is :
(1) 0.9
(2) 0.7
(3) 0.07
(4) 0.09
Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalyzed by :
(1) Aldolase
(2) Hexokinase
(3) Enolase
(4) Phosphofructokinase
Where is respiratory electron transport system (ETS) located in plants ?
(1) Mitochondrial matrix
(2) Outer mitochondrial membrane
(3) Inner mitochondrial membrane
(4) Intermembrane space
Pyruvate dehydrogenase activity during aerobic respiration requires
(1) Calcium
(2) Iron
(3) Cobalt
(4) Magnesium
The number of substrate level phosphorylations in one turn of citric acid cycle is
1) Three
2) Zero
3) One
4) Two
Which of the following statements is incorrect?
1) In ETC (Electron Transport Chain), one molecule of NADH+H+ gives rise to 2 ATP molecules, and one FADH2 gives rise to 3 ATP molecules.
2) ATP is synthesized through complex V.
3) Oxidation-reduction reactions produce proton gradient in respiration.
4) During aerobic respiration, role of oxygen is limited to the terminal stage.
What amount of energy is released from glucose during lactic acid fermentation?
1) Approximately 15%
2) More than 18%
3) About 10%
4) Less than 7%
What is the net gain of ATP when each molecule of glucose is converted to two molecules of pyruvic acid?
1) Four
2) Six
3) Two
4) Eight