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Respiration in Plants

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Respiration in Plants explains how plants release energy from organic compounds to carry out growth, maintenance, and metabolic activities. This category focuses on the biochemical pathways and mechanisms of respiration, making it suitable for Class 11–12 students, NEET aspirants, and undergraduate learners.

In this section, you will study:

  • Concept and significance of respiration in plants

  • Glycolysis and its steps

  • Krebs cycle and its role in energy release

  • Electron transport chain and oxidative phosphorylation

  • Anaerobic respiration and fermentation

  • Respiratory quotient and its significance

  • Factors affecting the rate of respiration

  • NCERT-based explanations, diagrams, flowcharts, MCQs, and exam-oriented questions

The content is structured to build clear conceptual understanding, strengthen pathway-based reasoning, and help students perform confidently in school examinations, NEET, and undergraduate assessments.

Develop a strong understanding of respiration as a vital life process that provides energy for all plant activities.

Q. During which part of the day do plants primarily perform respiration?
  • A. Daytime only
  • B. Nighttime only
  • C. Both day and night
  • D. Only during photosynthesis
Q. In which part of the plant does cellular respiration primarily occur?
  • A. Roots
  • B. Leaves
  • C. Stems
  • D. All parts
Q. What gas is primarily consumed during the respiration process in plants?
  • A. Oxygen
  • B. Carbon dioxide
  • C. Nitrogen
  • D. Hydrogen
Q. What is the end product of anaerobic respiration in plants?
  • A. Lactic acid
  • B. Ethanol
  • C. Carbon dioxide
  • D. Glucose
Q. What is the main difference between aerobic and anaerobic respiration in plants?
  • A. Oxygen requirement
  • B. Energy yield
  • C. Location in the plant
  • D. Type of glucose used
Q. What is the primary purpose of respiration in plants?
  • A. To produce glucose
  • B. To release energy
  • C. To absorb carbon dioxide
  • D. To synthesize chlorophyll
Q. What is the relationship between photosynthesis and respiration in plants?
  • A. They are the same process
  • B. Photosynthesis produces oxygen for respiration
  • C. Respiration produces glucose for photosynthesis
  • D. They occur in different organisms
Q. Which of the following is a byproduct of respiration in plants?
  • A. Oxygen
  • B. Glucose
  • C. Carbon dioxide
  • D. Starch
Q. Which of the following processes occurs during plant respiration?
  • A. Photosynthesis
  • B. Glycolysis
  • C. Transpiration
  • D. Nitrogen fixation
Q. Which organelle is primarily responsible for respiration in plant cells?
  • A. Chloroplast
  • B. Mitochondria
  • C. Nucleus
  • D. Endoplasmic reticulum
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