Respiration in Plants NEET Previously Asked Questions Series:
1. What is the role of NAD+ in cellular respiration? (NEET-2018)
(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
2. Which of these statements is incorrect? (NEET-2018)
(1) Enzymes of the TCA cycle are present in the mitochondrial matrix.
(2) Glycolysis occurs in the cytosol.
(3) Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms.
(4) Oxidative phosphorylation takes place in the outer mitochondrial membrane.
Answer: 4
3. Which statement is wrong for Krebs' cycle? (NEET-2017)
(1) There is one point in the cycle where FAD+ is reduced to FADH2
(2) During the conversion of succinyl CoA to succinic acid, a molecule of GTP is synthesized
(3) The cycle starts with the condensation of an 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
4. Which one of the following statements is correct, concerning enzymes? (NEET-2017)
(1) Holoenzyme = Apoenzyme + Coenzyme
(2) Coenzyme = Apoenzyme + Holoenzyme
(3) Holoenzyme = Coenzyme + Co-factor
(4) Apoenzyme = Holoenzyme + Coenzyme
Answer: 1
5. Which of the following biomolecules is common to the respiration-mediated breakdown of fats, carbohydrates, and proteins? (NEET-II 2016)
(1) Pyruvic acid
(2) Acetyl CoA
(3) Glucose-6-phosphate
(4) Fructose 1,6-bisphosphate
Answer: 2
6. A non-proteinaceous enzyme is : (NEET-II 2016)
(1) Ligase
(2) Deoxyribonuclease
(3) Lysozyme
(4) Ribozyme
Answer: 4
7. Which of the following describes the given graph correctly? (NEET-II 2016)
(1) Endothermic reaction with energy A in absence of enzyme and B in presence of enzyme
(2) Exothermic reaction with energy A in absence of enzyme and B in presence of enzyme
(3) Endothermic reaction with energy A in presence of enzyme and B in absence of enzyme
(4) Exothermic reaction with energy A in presence of enzyme and B in absence of enzyme.
Answer: 4
8. Transition state structure of the substrate formed during an enzymatic reaction is : (NEET-2013)
(1) permanent and stable
(2) transient but stable
(3) permanent but unstable
(4) transient and unstable
Answer: 4
9. Which of the metabolites are common to respiration mediated breakdown of fats, carbohydrates, and proteins? (NEET-2013)
(1) Acetyl CoA
(2) Glucose–6–phosphate
(3) Fructose1,6-bisphosphate
(4) Pyruvic acid
Answer: 1
10. The essential chemical components of many coenzymes are : (NEET-2013)
(1) Vitamins
(2) Proteins
(3) Nucleic acids
(4) Carbohydrates
Answer: 1
11. The three boxes in this diagram represent the three major biosynthetic pathways in aerobic respiration.
Arrows represent net reactants or products.
Arrow numbered 4, 8, and 12 can all be : (NEET-2013)
(1) FAD+ or FADH2
(2) NADH
(3) ATP
(4) H2O
Answer: 3