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NEET UG Respiration in Plants — practice questions

Explore 100 free Respiration in Plants questions in NEET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Respiration in Plants questions and exercises with answers

Showing questions 1–30 of 100.

The breakdown of glucose into pyruvic acid in the cytoplasm is calledRead the answer and worked solution →Glycolysis occurs in theRead the answer and worked solution →Per glucose molecule, glycolysis yields a netRead the answer and worked solution →Pyruvate dehydrogenase converts pyruvate toRead the answer and worked solution →The Krebs cycle (TCA cycle) begins with the condensation ofRead the answer and worked solution →In which organelle does aerobic respiration take place?Read the answer and worked solution →The terminal electron acceptor in the ETS isRead the answer and worked solution →Alcoholic fermentation by yeast yieldsRead the answer and worked solution →Lactic acid fermentation occurs inRead the answer and worked solution →The respiratory quotient (RQ) of carbohydrate respiration isRead the answer and worked solution →Oxidative phosphorylation differs from substrate-level phosphorylation in thatRead the answer and worked solution →The number of ATP molecules produced per NADH oxidised in ETS isRead the answer and worked solution →FADH2 entering the ETS via Complex II yields how many ATP?Read the answer and worked solution →The net theoretical ATP yield from complete aerobic respiration of one glucose molecule isRead the answer and worked solution →Krebs cycle requires which input from the previous step?Read the answer and worked solution →During TCA cycle, GTP (eventually ATP) is generated at the step whereRead the answer and worked solution →The respiratory pathway is described as 'amphibolic' because itRead the answer and worked solution →The chemiosmotic hypothesis was proposed byRead the answer and worked solution →ATP synthase has F0 and F1 components. F1 isRead the answer and worked solution →Per ATP synthesised by mitochondrial ATP synthase, the number of H+ that pass through F0 isRead the answer and worked solution →The respiratory quotient (RQ) of fat respiration is approximatelyRead the answer and worked solution →The maximum natural alcohol concentration in fermentation is limited becauseRead the answer and worked solution →Cytochrome c isRead the answer and worked solution →In the TCA cycle, CO2 is released at which step pair?Read the answer and worked solution →Lactic acid fermentation in muscle differs from alcoholic fermentation in that lactic acid fermentationRead the answer and worked solution →In aerobic respiration of one glucose, the number of CO2 released isRead the answer and worked solution →Anaplerotic reactions in cellular metabolismRead the answer and worked solution →Energy yield per gram of fat vs carbohydrate during respiration isRead the answer and worked solution →The end product of glycolysis isRead the answer and worked solution →Net ATP yield per glucose from glycolysis alone isRead the answer and worked solution →

Worked practice questions

The breakdown of glucose into pyruvic acid in the cytoplasm is called

  1. Krebs or TCA cycle steps
  2. Electron transport chain
  3. Oxidative phosphorylation
  4. Glycolysis or EMP pathway
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Correct answer: D. Glycolysis or EMP pathway

Glycolysis (Embden-Meyerhof-Parnas pathway) is the cytoplasmic 10-step partial oxidation of glucose into 2 pyruvate. It occurs in all living cells and is the only respiratory pathway in anaerobes.

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Glycolysis occurs in the

  1. Cytoplasm of the cell
  2. Matrix of the mitochondrion
  3. Inner mitochondrial membrane
  4. Stroma of the chloroplast
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Correct answer: A. Cytoplasm of the cell

Glycolysis is cytoplasmic. The pyruvate it produces is transported into the mitochondrial matrix for further oxidation. ETS and oxidative phosphorylation occur on the inner mitochondrial membrane.

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Per glucose molecule, glycolysis yields a net

  1. 1 ATP and 1 NADH molecule
  2. 0 ATP and 8 NADH molecules
  3. 2 ATP and 2 NADH molecules
  4. 4 ATP and 4 NADH molecules
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Correct answer: C. 2 ATP and 2 NADH molecules

Glycolysis uses 2 ATP (priming) and produces 4 ATP (substrate-level phosphorylation), so NET 2 ATP. It also yields 2 NADH (from the PGAL to BPGA step) per glucose.

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