Respiration in Plants NEET Questions with Answers:
Respiration in Plants MCQ for NEET:
1. Energy obtained by a cell from catabolic reaction is stored immediately in the form of_________
(1) Pyruvic acid
(2) Glucose
(3) ATP
(4) DNA
Answer: 3
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2. Which component of ETS is mobile carrier?
(1) UQ (CO-Q)
(2) Cyt - a
(3) Cyto-b
(4) Cyt-f
Answer: 1
Read: Cell The Unit of Life MCQs
3. R.Q. is less than one at the time of respiration of_______
(1) Starch
(2) Sugarcane
(3) Glucose
(4) Ground nut
Answer: 4
Read: Transport in Plants MCQs
4. Glycolysis is a breakdown of glucose in pyruvic acid. It is__________
(1) Aerobic
(2) Anaerobic
(3) Aerobic and anaerobic
(4) Automaticity
Answer: 2
Read: Mineral Nutrition MCQs
5. Vitamin-B2 is prosthetic group of________
(1) Haemoglobin
(2) FAD (Flavin Adenine Dinucleotide)
(3) NAD (Nicotinamide Adenine Dinucleotide)
(4) Haemocyanin
Answer: 2
Read: Digestion and Absorption MCQs
6. In RBC, ATP synthesis takes place by__________
(1) Substrate level phosphorylation
(2) Glycolysis
(3) TCA cycle
(4) ETS
Answer: 1
Read: Body Fluids and Circulation MCQs
7. Anaerobic oxidation of pyruvic acid into ethanol and CO2 occurs in________
(1) Yeast cell
(2) Higher plants
(3) Animals
(4) Fungi
Answer: 1
Read: Excretory Products and their Elimination MCQs
8. Oxidation process of fat is known as_______
(1) Gluconeogenesis
(2) b-Oxidation
(3) Lipolysis
(4) Fermentation
Answer: 2
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9. Glycolysis requires________
(1) Cytoplasmic enzymes, ADP, ATP, NAD
(2) FAD, Cytochromes, Proteins, NADP
(3) FAD, NAD, Proteins, Cytochromes
(4) Mitochondrial enzymes, ATP, NAD, ADP
Answer: 1
Read: Chemical Coordination and Integration MCQs
10. Number of ATP produced from one pyruvic acid during conversion to acetyl Co-A________
(1) 6
(2) 3
(3) 12
(4) 15
Answer: 2
11. An example of competitive inhibition of an enzyme is the inhibition of__________
(1) Succinic dehydrogenase by malonic acid
(2) Cytochrome oxidase by cyanide
(3) Hexokinase by glucose - 6 phosphate
(4) Carbonic anhydrase by carbon - dioxide
Answer: 1
12. Conversion of pyruvic acid into ethyl alcohol is mediated by_________
(1) Phosphatase
(2) Dehydrogenase
(3) Decarboxylase & dehydrogenase
(4) Catalase
Answer: 3
13. The formation of Acetyl Co-A from pyruvic acid is the result of its________
(1) Reduction
(2) Dehydration
(3) Phosphorylation
(4) Oxidative decarboxylation
Answer: 4
14. Which of the following is link between carbohydrates and fat metabolism?
(1) CO2
(2) Acetyl Co-A
(3) Pyruvic acid
(4) Citric acid
Answer: 2
15. Pyruvate dehydrogenase complex is used in converting_______
(1) Pyruvate to glucose
(2) Glucose to pyruvate
(3) Pyruvic acid to lactic acid
(4) Pyruvate to acetyl Co-A
Answer: 4
16. What is the role of NAD+ in cellular respiration?
(1) It functions as an enzyme
(2) It functions as an electron carrier
(3) It is a nucleotide source for ATP synthesis
(4) It is the final electron acceptor for anaerobic respiration
Answer: 2
17. Which of these statements is incorrect?
(1) Enzymes of TCA cycle are present in mitochondrial matrix.
(2) Glycolysis occurs in cytosol.
(3) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
(4) Oxidative phosphorylation takes place in outer mitochondrial membrane.
Answer: 4
18. Which statement is wrong for Krebs' cycle ?
(1) There is one point in the cycle where FAD+ is reduced to FADH2
(2) During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised
(3) The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid
(4) There are three points in the cycle where NAD+ is reduced to NADH+ H
Answer: 3
19. Which one of the following statements is correct, with reference to enzymes ?
(1) Holoenzyme = Apoenzyme + Coenzyme
(2) Coenzyme = Apoenzyme + Holoenzyme
(3) Holoenzyme = Coenzyme + Co-factor
(4) Apoenzyme = Holoenzyme + Coenzyme
Answer: 1
20. Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates and proteins?
(1) Pyruvic acid
(2) Acetyl CoA
(3) Glucose-6-phosphate
(4) Fructose 1,6-bisphosphate
Answer: 2
21. A non-proteinaceous enzyme is___________
(1) Ligase
(2) Deoxyribonuclease
(3) Lysozyme
(4) Ribozyme
Answer: 4
22. Transition state structure of the substrate formed during an enzymatic reaction is__________
(1) permanent and stable
(2) transient but stable
(3) permanent but unstable
(4) transient and unstable
Answer: 4
23. Which of the metabolites are common to respirationmediated breakdown of fats, carbohydrates and proteins ?
(1) Acetyl CoA
(2) Glucose–6–phosphate
(3) Fructose1,6-bisphosphate
(4) Pyruvic acid
Answer: 1
24. The essential chemical components of many coenzymes are__________
(1) Vitamins
(2) Proteins
(3) Nucleic acids
(4) Carbohydrates
Answer: 1
25. Allosteric enzymes have allosteric sites for –
(1) Inhibition only
(2) Activation only
(3) Reduction in activation energy
(4) Both activation and inhibition
Answer: 4
26. In mitochondrial ETS, cytochrome 'C' acts as a mobile carrier for transfer of electrons between_______
(1) Complex III and IV
(2) Complex I and II
(3) Complex II and III
(4) Complex IV and V
Answer: 1
27. In mitochondria, protons accumulate in the :
(1) Matrix
(2) Outer membrane
(3) Inner membrane
(4) Intertermembrane space
Answer: 4
28. Which intermediate of Krebs cycle is used as a substrate for amino acid biosynthesis_______
(1) Citric acid
(2) a-ketoglutarate
(3) Succinyl-CoA
(4) All of the above
Answer: 2
29. Which of the following is a common feature between glycolysis and Krebs cycles_______
(1) Release of CO2.
(2) Formation of FADH2.
(3) Site of the processes.
(4) Dehydrogenation.
Answer: 4
30. Enzymes, which catalyse the transfer of hydrogen(H) between two substrates, are called_______
(1) Transferases
(2) Oxidoreductases
(3) Isomerases
(4) Hydrolases
Answer: 2
31. The catalytic efficiency of two different enzymes can be compared by the :
(1) The Km value
(2) The pH optimum value
(3) Formation of the product
(4) Molecular size of the enzyme
Answer: 1
32. Which is the site of Kreb's cycle_______
(1) Chloroplast
(2) Golgibody
(3) Mitochondria
(4) Endoplasmic reticulum
Answer: 3
33. Which of the following statements is correct?
(1) All the proteins are enzymes
(2) All enzymes are proteins
(3) Almost all enzymes are proteins
(4) All enzymes are nucleic acids
Answer: 3
34. Which of the following statements regarding enzyme inhibition is correct?
(1) Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate substrate
(2) Competitive inhibition is seen, when a substrate competes with an enzyme for binding to an inhibitor protein
(3) Competitive inhibition is seen, when the substrate and the inhibitor compete for the active site on the enzyme
(4) Non-competitive inhibitors often bind to the enzyme irreversibly.
Answer: 3
35. In which one of the following processes CO2 is not released ?
(1) Aerobic respiration in plants
(2) Aerobic respiration in animals
(3) Alcoholic fermentation
(4) Lactate fermentation
Answer: 4
36. Which one of the following statements in incorrect?
(1) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.
(2) The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
(3) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate.
(4) All of these
Answer: 3