Plant Respiration GRBPradip BhattaAugust 21, 2026 Welcome to your Plant Respiration GRB Name Email 1. Conversion of glucose to glucose-6-phosphate, the first irreversible reaction of glycolysis, is catalysed by Phosphofructokinase Aldolase Hexokinase Enolase. None 2. What is the role of NAD⁺ in cellular respiration? It functions as an enzyme. It functions as an electron carrier. It is a nucleotide source for ATP synthesis. It is the final electron acceptor for anaerobic respiration. None 3. In glycolysis, during oxidation electrons are removed by ATP Glyceraldehyde-3-phosphate NAD⁺ Molecular oxygen. None 4. At the end of glycolysis, six carbon compound ultimately changes into Ethyl alcohol Acetyl Co-A Pyruvic acid ATP. None 5. The first phase in the breakdown of glucose, in animal cell, is Fermentation Kreb’s cycle Glycolysis ETS. None 6. End product of glycolysis is Acetyl CoA Pyruvic acid Glucose 1-phosphate Fructose 1-phosphate. None 7. In which one of the following processes CO₂ is not released? Aerobic respiration in plants Aerobic respiration in animals Alcoholic fermentation Lactate fermentation. None 8. The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called Glycolysis Fermentation Aerobic respiration Photorespiration. None 9. In alcohol fermentation Triose phosphate is the electron donor while acetaldehyde is the electron acceptor Triose phosphate is the electron donor while pyruvic acid is the electron acceptor There is no electron donor Oxygen is the electron acceptor. None 10. The end product of fermentation are O₂ and C₂H₅OH CO₂ and acetaldehyde CO₂ and O₂ CO₂ and C₂H₅OH. None 11. Which of the following products are obtained by anaerobic respiration from yeast? Beer and wine Alcohols CO₂ All of these. None 12. When yeast ferments glucose, the products obtained are Ethanol and CO₂ Methanol and CO₂ Ethanol and water Water and CO₂. None 13. The number of substrate level phosphorylations in one turn of citric acid cycle is 0 1 2 3 None 14. Where is respiratory electron transport system (ETS) located in plants? Mitochondrial matrix Outer mitochondrial membrane Inner mitochondrial membrane Intermembrane space. None 15. Which of these statements is incorrect? Enzymes of TCA cycle are present in mitochondrial matrix. Glycolysis occurs in cytosol. Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms. Oxidative phosphorylation takes place in outer mitochondrial membrane. None 16. Which statement is wrong for Krebs’ cycle? There is one point in the cycle where FAD⁺ is reduced to FADH₂. During conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesised. The cycle starts with condensation of acetyl group (acetyl CoA) with pyruvic acid to yield citric acid. There are three points in the cycle where NAD⁺ is reduced to NADH + H⁺. None 17. Oxidative phosphorylation is Formation of ATP by transfer of phosphate group from a substrate to ADP Oxidation of phosphate group in ATP Addition of phosphate group to ATP Formation of ATP by energy released from electrons removed during substrate oxidation. None 18. Cytochromes are found in Cristae of mitochondria Lysosomes Matrix of mitochondria Outer wall of mitochondria. None 19. In mitochondria, protons accumulate in the Outer membrane Inner membrane Intermembrane space Matrix. None 20. 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 Isocitrate dehydrogenase Malate dehydrogenase Succinate dehydrogenase Lactate dehydrogenase. None 21. In which one of the following do the two names refer to one and the same thing? Kreb’s cycle and Calvin cycle Tricarboxylic acid cycle and citric acid cycle Citric acid cycle and Calvin cycle Tricarboxylic acid cycle and urea cycle. None 22. Cytochrome is Metallo flavo protein Fe containing porphyrin pigment Glycoprotein Lipid. None 23. Which one of the following statements about cytochrome P₄₅₀ is wrong? It is a coloured cell. It is an enzyme involved in oxidation reactions. It has an important role in metabolism. It contains iron. None 24. Which of the following is the key intermediate compound linking glycolysis to the Kreb’s cycle? Malic acid Acetyl CoA NADH ATP. None 25. In Kreb’s cycle, the FAD precipitates as electron acceptor during the conversion of Fumaric acid to malic acid Succinic acid to fumaric acid Succinyl CoA to succinic acid α-ketoglutarate to succinyl CoA. None 26. The correct sequence of electron acceptor in ATP synthesis is Cyt. b, c, a₃, a Cyt. c, b, a, a₃ Cyt. a, a, b, c Cyt. b, c, a, a₃. None 27. The 1992 Nobel Prize for medicine was awarded to Edmond H. Fischer and Edwin J. Krebs for their work concerning Reversible protein phosphorylation as a biological regulation mechanism Isolation of the gene for a human disease Human genome project Drug design involving inhibition of DNA synthesis of the pathogen. None 28. End product of citric acid cycle/Kreb’s cycle is Citric acid Lactic acid Pyruvic acid CO₂ + H₂O. None 29. Oxidative phosphorylation is production of ATP in photosynthesis NADPH in photosynthesis ATP in respiration NADH in respiration. None 30. End products of aerobic respiration are sugar and oxygen water and energy carbon dioxide, water and energy carbon dioxide and energy. None
