In This Post we are providing Chapter-14 Respiration in Plants NCERT MCQ for Class 11 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON RESPIRATION IN PLANTS
Question 1 : In Krebs’s cycle, the FAD participates as electron acceptor during the conversion of
- a) succinic acid to fumaric acid
- b) fumaric acid to malic acid
- c) succinyl CoA to succinic acid
- d) None of these
Answer : succinic acid to fumaric acid
Question 2 : The major reason that glycolysis is not as energy productive as respiration is that
- a) pyruvate is more reduced than CO2; it still contains much of the energy from glucose
- b) it does not take place in a specialized membrane-bound organelle.
- c) it is the pathway common to fermentation and respiration
- d) None of these
Answer : pyruvate is more reduced than CO2; it still contains much of the energy from glucose
Question 3 : Which of the following is a 4-carbon compound?
- a) Oxaloacetic acid
- b) Phosphoglyceric acid
- c) Citric acid
- d) Phosphoenol pyruvate
Answer : Oxaloacetic acid
Question 4 : Which of the following is a biological uncoupler of oxidative phosphorylation ?
- a) Thermogenin
- b) 2, 4 – Dichlorophenoxy acetic acid
- c) 2, 4 – Dinitrophenol
- d) Ethylene diaminotetra acetic acid
Answer : Thermogenin
Question 5 : Which of the following is not true for oxidative phosphorylation?
- a) It uses oxygen as the initial electron donor.
- b) It involves the redox reactions of electron transport chain
- c) It involves an ATP synthase located in the inner mitochondrial membrane.
- d) It depends on chemiosmosis
Answer : It uses oxygen as the initial electron donor.
Question 6: Final electron acceptor in oxidative phosphorylation is
- a) oxygen
- b) hydrogen
- c) cytochrome
- d) None of these
Answer : oxygen
Question 7 : Quantasomes are found in
- a) chloroplast
- b) mitochondria
- c) lysosome
- d) None of these
Answer : chloroplast
Question 8 : Which of the following is an important intermediate found in all the types of respiration ?
- a) Pyruvic acid
- b) Tricarboxylic acid
- c) Acetyl CoA
- d) Oxaloacetate
Answer : Pyruvic acid
Question 9 : Incomplete oxidation of glucose into pyruvic acid with several intermediate steps is known as
- a) Glycolysis
- b) Krebs cycle
- c) TCA-pathway
- d) HMS-pathway
Answer : Glycolysis
Question 10 : Common enzyme in glycolysis and pentose phosphate pathways is
- a) hexokinase
- b) fumarase
- c) aconitase
- d) dehydrogenase
Answer : hexokinase
Question 11 : One of the following is common to glycolysis as well as Krebs cycle in eukaryotes
- a) Substrate level phosphorylation
- b) Photophosphorylation
- c) Localization in mitochondria
- d) None of these
Answer : Substrate level phosphorylation
Question 12 : A mutant cell lacking mitochondria will show
- a) Inability to oxidize carbohydrates and fats
- b) Inability to synthesize glucose
- c) Inability to oxidize fats
- d) Inability to oxidize carbohydrates
Answer : Inability to oxidize carbohydrates and fats
Question 13 : During the early stages of alcoholic fermentation there is a high rate of growth of yeast. After some time the rate decreases. Which of the following conditions in the culture medium is least likely to have caused this?
- a) Depletion of oxygen
- b) Depletion of mineral salts
- c) Accumulation of waste products
- d) Depletion of glucose
Answer : Depletion of oxygen
Question 14 : Hexose monophosphate shunt does not take place when
- a) NAD is available
- b) NAD is not available due to shortage of oxygen
- c) Glucose is the substrate
- d) Oxygen is not enough
Answer : NAD is available
Question 15 : Chemiosmosis theory of ATP synthesis in the chloroplasts and mitochondria is based on
- a) proton gradient
- b) accumulation of Na ions
- c) membrane potential
- d) None of these
Answer : proton gradient
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