MCQ Questions Chapter 14 Respiration in Plants Class 11 Biology

MCQ Class 11

Please refer to MCQ Questions Chapter 14 Respiration in Plants Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 14 Respiration in Plants in Class 11 Biology provided below to get more marks in exams.

Chapter 14 Respiration in Plants MCQ Questions

Please refer to the following Chapter 14 Respiration in Plants MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 14 Respiration in Plants Class 11 Biology

Question- Terminal cytochrome of respiratory chain which donates electrons to oxygen is
(a) cyt. b
(b) cyt. c
(c) cyt.
(d) cyt. a3

Answer

D

Question- Match the number of carbon atoms given in column – I with that of the compounds given in column – II and select the correct option.
Column – I                 Column – II
A. 4C compound     I. Acetyl CoA
B. 2C compound     II. Pyruvate
C. 5C compound     III. Citric acid
D. 3C compound     IV. a- ketoglutaric acid
                              V. Malic acid
(a) A – II; B – V; C – III; D – I
(b) A – V; B – I; C – IV; D – II
(c) A – III; B – I; C – IV; D – II
(d) A – V; B – III; C – I; D – II

Answer

B

Question- Which of the following statement is/are the correct events in aerobic respiration?
(i) The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of O2.
(ii). The complete oxidation of pyruvate by the stepwise removal of all the hydrogen atoms, leaving three molecules of CO2.
(iii) The passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with simultaneous synthesis of ATP.
(iv) The passing on of the electrons removed as part of the hydrogen atoms to molecular O2 with simultaneous synthesis of ADP.
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)

Answer

C

Question- In citric acid cycle, energy bond (GTP) is produced as a result of conversion of
(a) citric acid to a-keto glutaric acid.
(b) succinic acid to malic acid.
(c) succinyl – CoA to succinic acid.
(d) succinic acid to succinyl – CoA.

Answer

C

Question- Which of the following is a more accurate statement about respiration ?
(a) O2 must always be available for respiration.
(b) O2 combines with carbon to form CO2.
(c) O2 combines with hydrogen to form H2O.
(d) Air is inhaled and exhaled only from stomata.

Answer

C

Question- Glycolysis occurs in the ________ and produces________, which in the presence of O2 enters the____________.
(a) cytosol; pyruvate; mitochondrion
(b) cytosol; glucose; mitochondrion
(c) mitochondrion; pyruvate; chloroplast
(d) chloroplast; glucose; cytosol

Answer

A

Question- In which of the following reaction of glycolysis, a molecule of water is removed from the substrate ?
(a) Frucoste-6-phosphate → Fructose 1, 6-phosphate
(b) 3-phosphate glyceraldehyde → 1, 3-biphosphoglyceric acid
(c) PEP → Pyruvic acid
(d) 2-phosphoglycerate → PEP

Answer

D

Question- Decarboxylation is not involved in
(a) electron transport system
(b) glycolysis
(c) Kreb’s cycle
(d) alcoholic fermentation

Answer

B

Question- Conversion of phosphenol pyruvic acid to pyruvic acid and ADP to ATP are examples of
(a) photophosphorylation.
(b) oxidative phosphorylation.
(c) photoelectric phosphorylation.
(d) substrate level phosphorylation.

Answer

D

Question- When oxygen is not available to a muscle cell, NADH formed during glycolysis does not pass electrons to the ETS. Instead, it passes hydrogen atoms to
(a) acetyl CoA
(b) pyruvic acid
(c) fructose
(d) ADP

Answer

B

Question- Which one of the following process releases a carbon dioxide molecule?
(a) Glycolysis
(b) Lactic acid fermentation
(c) Alcohol fermentation
(d) Hydrolysis of glycogen

Answer

C

Question- Acceptor of acetyl Co-A in Kreb’s cycle is
(a) malic acid
(b) fumaric acid
(c) a-keto glutaric acid
(d) oxaloacetic acid

Answer

D

Question- In the fermentation of one glucose molecule, there is a net gain of ______________ molecules of ATP.
(a) one
(b) two
(c) six
(d) eight

Answer

B

Question- Which one of the following reactions is an example of oxidative decarboxylation?
(a) Conversion of succinate to fumarate.
(b) Conversion of fumarate to malate.
(c) Conversion of pyruvate to acetyl CoA.
(d) Conversion of citrate to isocitrate.

Answer

C

Question- If R. Q. is less than 1.0 in a respiratory metabolism, it means that
(a) carbohydrates are used as respiratory substrate.
(b) organic acids are used as respiratory substrate.
(c) the oxidation of the respiratory substrate consumed more oxygen than the amount of CO2 released.
(d) the oxidation of the respiratory substrate consumed less oxygen than the amount of CO2 released.

Answer

B

Question- In which one of the following do the two names refer to tricarboxylic acid cycle?
(a) a-ketoglutaric acid and Krebs cycle
(b) Malic acid cycle and Kornberg cycle
(c) Citric acid cycle and Krebs cycle
(d) Oxaloacetic acid and Kornberg cycle

Answer

C

Question- Citrate synthase, an enzyme of TCA cycle is located in
(a) cytosol in prokaryotes.
(b) mitochondrial matrix in eukaryotes.
(c) both (a) and (b)
(d) none of the above

Answer

C

Question- During the process of respiration, which of the followings are released as products?
(a) CO2, H2O and O2
(b) CO2, O2 and energy
(c) CO, H2O and energy
(d) CO2, H2O and energy

Answer

D

Question- Out of 38 ATP molecules produced per glucose, 32 ATP molecules are formed from NADH/FADH2 in
(a) respiratory chain
(b) Krebs cycle
(c) oxidative decarboxylation
(d) EMP

Answer

A

Question-Which of the following statement regarding pyruvate during aerobic respiration is incorrect?
(a) It is formed by the glycolytic catabolism of carbohydrates in the mitochondrial matrix.
(b) It enters mitochondrial matrix & undergoes oxidative decarboxylation.
(c) The conversion of pyruvic acid to acetyl CoA is catalysed by pyruvic dehydrogenase.
(d) Two molecules of NADH are produced from the metabolism of two molecules of pyruvic acid.

Answer

A

Question- Total number of ATP consumed during Kreb’s cycle is
(a) 0
(b) 1
(c) 2
(d) 3

Answer

A

Question- ATP is
(a) an energy currency
(b) a nucleotide
(c) formed in both respiration and photosynthesis
(d) all of the above

Answer

D

Question- Which of the following are not used in the conversion by pyruvate to acetyl CoA?
(i) Oxidative dehydrogenation
(ii) Oxidative dehydration
(iii) Oxidative phosphorylation
(iv) Oxidative decarboxylation
(a) (i), (ii) and (iii)
(b) (i) and (ii)
(c) (ii) and (iv)
(d) (i) and (iii)

Answer

D

Question- A major site for synthesis of ATP from ADP and Pi is
(a) F1 headpiece in mitochondria.
(b) F0.
(c) F1 – F0.
(d) mitochondria.

Answer

A

Question- The enzymes, involved in the chemical reactions of glycolysis are located
(a) in the fluid matrix of cytoplasm.
(b) in the mitochondrial matrix.
(c) in the nuclear sap.
(d) on the cristae of a mitochondria.

Answer

A

Question- How many ATP molecules can be produced through oxidative phosphorylation of 2NADH2 and 3 FADH2?
(a) 15
(b) 24
(c) 6
(d) 12

Answer

D

Question- Chemiosmotic theory of ATP synthesis in the chloroplasts and mitochondria is based on the
(a) membrane potential.
(b) accumulation of Na ions.
(c) accumulation of K ions.
(d) proton gradient.

Answer

D

Question- Cellular respiration includes the various pathways by which carbohydrates and other metabolites are broken down with the consecutive buildup of
(a) ATP
(b) protein
(c) vitamins
(d) none of these

Answer

A

Question- The correct sequence of electron acceptor in ATP synthesis is
(a) cyt a a b c
(b) cyt b c a a3
(c) cyt b c a3 a
(d) cyt c b a a3

Answer

B

Question- Respiration is a/an
(a) anabolic + exergonic
(b) catabolic + exergonic
(c) catabolic + endergonic
(d) anabolic + endergonic

Answer

B

Question- Refer the given equation and answer the question
2(C51H98O6 ) + 145O2 → 102CO2 + 98H2O + Energy
The R.Q of above reaction is
(a) 1
(b) 0.7
(c) 1.45
(d) 1.62

Answer

B

Question- Select the incorrect statement about NADH during cellular respiration.
(a) It is synthesized in glycolysis.
(b) It is transferred into the mitochondria.
(c) It undergoes oxidative phosphorylation.
(d) It is reduced to NAD+.

Answer

D

Question- In the electron transport system, the final acceptor of proton is
(a) cytochrome b
(b) cytochrome a3
(c) oxygen
(d) ubiquinone (substance A)

Answer

C

Question- The overall goal of glycolysis, Kreb’s cycle and the electron transport system is the formation of
(a) ATP in one large oxidation reaction
(b) sugars
(c) nucleic acids
(d) ATP in small stepwise units

Answer

C

Question- Which of the following statement regarding the process of glycolysis is correct?
(a) Glucose undergoes complete oxidation to form two molecules of pyruvic acid.
(b) Glucose undergoes partial oxidation to form one molecule of pyruvic acid.
(c) Glucose undergoes complete oxidation to form one molecule of pyruvic acid.
(d) Glucose undergoes partial oxidation to form two molecules of pyruvic acid.

Answer

D

Question- In an anaerobic condition, yeast cells breakdown glucose into
(a) CO2 + H2O
(b) C2H5OH and CO2
(c) CO2 + lactic acid
(d) CO2 + pyruvic acid

Answer

B

Question- Which of the following statement is correct in relation to the ETS?
(a) It is present in the mitochondrial matrix.
(b) Oxidation of one molecule of NADH gives rise to 2 molecules of ATP, while that of one molecule of FADH2 produces 3 molecules of ATP.
(c) Oxygen acts as the final hydrogen acceptor.
(d) In respiration, light energy is utilized for the production of proton gradient.

Answer

C

Question- The F1 headpiece is a
(a) peripheral membrane protein complex.
(b) integral membrane protein complex.
(c) transmembrane protein.
(d) carrier protein.

Answer

A

Question- Which of the following statement about cellular energyharvesting pathway is incorrect?
(a) Pyruvate oxidation can only occur under aerobic conditions.
(b) Autotrophs can produce their own food but must obtain energy from it by glycolysis & cellular respiration.
(c) Fermentation usually occurs under aerobic conditions.
(d) All of the above

Answer

C

Question- Electron Transport System (ETS) is present in
(a) inner mitochondrial membrane.
(b) mitochondrial matrix.
(c) chlorophyll.
(d) chloroplast.

Answer

A

Question- Which of the following statement(s) concerning ATP synthesis is/are correct?
(a) ATP can be synthesized through substrate level phosphorylation, photophosphorylation and oxidative phosphorylation.
(b) The proton-motive force is the establishment of proton gradients and electrochemical potentials across the inner membrane.
(c) Proton-motive force is essential for back flow of H+ from outer chamber of matrix of mitochondria through proton channel (F0) of F0 – F1 particle to produce ATP.
(d) All of the above

Answer

D

Question- Which of the following is amphibolic in nature?
(a) Glycolysis
(b) Oxidative decarboxylation of pyruvate
(c) TCA cycle
(d) Oxidative phosphorylation

Answer

C

Question- Which one of the following is essential for the respiration as well as photosynthesis ?
(a) Ubiquinone
(b) Cytochrome
(c) RuBisCO
(d) Plastocyanin

Answer

B

Question- Which of the following statements (i to v) regarding glycolysis are correct.
(i) It is ten enzymatic reactions that convert a six-carbon molecule to a three carbon pyruvate and result in a net gain of 2 ATP molecules.
(ii) Glucose undergoes partial oxidation to form one molecule of pyruvic acid.
(iii) Glucose is phosphorylated to give rise to glucose – 6 – phosphate by the activity of the enzyme phosphofructokinase.
(iv) The scheme of glycolysis was given by Gustav Embden, Otto Morrison, and J. Parnas and is often referred to as the EMP pathway.
(v) ATP is utilized at two steps: first in the conversion of glucose into glucose 6-phosphate & second in the conversion of fructose – 6- phosphate to fructose 1 ,6-disphosphate.
(a) (i), (iv) and (v)
(b) (iii) and (v)
(c) (iv) and (v)
(d) (ii) and (iv)

Answer

A

Question- Match the column-I with column-II and choose the correct combination from the options given below.
Column-I                                               Column-II
A. Inner mitochondrial membrane      I. Krebs cycle
B. Pyruvic acid is converted into        II. ETC
CO2 and ethanol.
C. Cytoplasm                                       III. Fermentation
D. Mitochondrial matrix                      IV. Glycolysis
(a) A – IV; B – III; C – II; D – I
(b) A – I; B – II; C – IV; D – III
(c) A – II; B – I; C – III; D – IV
(d) A – II; B – III; C – IV; D – I

Answer

D

Question- Which of the following is incorrect regarding the Kreb’s cycle?
(a) It is also known as tricarboxylic acid cycle.
(b) It occurs in mitochondria.
(c) It starts with six carbon compound.
(d) It does not involve any decarboxylation step.

Answer

D

Question- Which of the following is incorrectly matched?
(a) Protein → Degarded by proteases
(b) Fats → Fatty acid + PGAL
(c) Kreb’s cycle → Carboxylation
(c) Respiratory pathway → Amphibolic

Answer

C

Question- Respiration substrates are
(i) the compounds that are oxidized to utilise energy.
(ii) the compounds that are reduced to utilise energy.
(iii) the compounds that are oxidized to release energy.
(iv) the compounds that are reduce to release energy.
(a) (i) only
(b) both (i) and (ii)
(c) (iii) only
(d) Both (iii) and (iv)

Answer

C

Question– During the formation of bread, it becomes porous due to release of CO2 by the action of :-
(a) Yeast
(b) Bacteria
(c) Virus
(d) Protozoans

Answer

A

Question- Excess of ATP inhibits the enzyme –
(a) Phosphofructokinase
(b) Hexokinase
(c) Aldolase (Lyases)
(d) Pyruvate decarboxylase

Answer

A

Question- The incomplete breakdown of sugars in anaerobic respiration results in the formation of
(a) Fructose and water
(b) Glucose and carbon dioxide
(c) Alcohol and CO2
(d) Water and CO 

Answer

C

Question- Respiratory enzymes are localised in
(a) Ribosomes
(b) Chloroplast
(c) Mitochondria
(d) none of the above

Answer

C

Question- End product of glycolysis is
(a) Citric acid
(b) Glyceraldehyde
(c) Phosphoglyceraldehyde
(d) Pyruvic acid

Answer

D

Question- Common immediate source of energy in cellular activity is
(a) glucose
(b) aldohexose
(c) ATP
(d) NAD

Answer

C

Question- The enzyme which converts glucose to glucose-6- phosphate –
(a) Phosphorylase
(b) Gluco-phosphorylase
(c) Hexokinase
(d) Phospho glucomutase

Answer

C

Question- In respiration pyruvic acid is
(a) Formed only when oxygen is available
(b) One of product of Krebs cycle
(c) Broken down into Acetyl Co-A and CO
(d) Oxidised into Alcohol

Answer

C

Question- Most of the energy of the carbohydrates is released by oxidation when
(a) Pyruvic acid is converted into CO2 and H2O
(b) Pyruvic acid is converted into acetyl Co-A
(c) Sugar is converted into pyruvic acid
(d) Glucose is converted into alcohol and CO2

Answer

A

Question- The end products of respiration in plants are
(a) CO2, H2O and energy
(b) Starch and O2
(c) Sugar and oxygen
(d) H2O and energy

Answer

A

MCQ Questions Chapter 14 Respiration in Plants Class 11 Biology

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