Practice Test Sets (Total Questions: 100)

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Topic Practice: Respiration in Plants (Test - 1)

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About Respiration in Plants MCQ

Master Respiration in Plants for NEET UG through comprehensive MCQs, glycolysis, Krebs cycle, electron transport chain pathways, and high-yield conceptual no…

This Respiration in Plants MCQ practice set is designed for students preparing for school exams and competitive exams. It contains 100 multiple choice questions divided into 2 test sets of up to 50 questions each. Every question has four options, and after answering you can see the correct option, a detailed explanation and how other users answered.

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Sample Respiration in Plants Questions

  1. Which enzyme catalyzes the irreversible, rate-limiting key regulatory step of glycolysis that converts Fructose-6-phosphate to Fructose-1,6-bisphosphate?
    • A. Hexokinase
    • B. Phosphofructokinase-1 (PFK-1)
    • C. Pyruvate kinase
    • D. Aldolase
  2. How many total substrate-level phosphorylations occur per glucose molecule during the complete pathway of aerobic respiration (Glycolysis + Link Reaction + Krebs Cycle)?
    • A. 2
    • B. 4
    • C. 6
    • D. 8
  3. During glycolysis, oxidation of Glyceraldehyde-3-phosphate (PGAL) to 1,3-bisphosphoglycerate (BPGA) involves:
    • A. Direct utilization of ATP to add phosphate
    • B. Reduction of NADP+ to NADPH+H+
    • C. Removal of two hydrogen atoms transferred to NAD+ along with addition of inorganic phosphate (Pi)
    • D. Decarboxylation releasing CO2
  4. In alcoholic fermentation by yeast, the conversion of Pyruvic acid to Ethanol involves two steps catalyzed by which enzymes sequentially?
    • A. Pyruvate dehydrogenase and Alcohol dehydrogenase
    • B. Pyruvate decarboxylase and Alcohol dehydrogenase
    • C. Lactate dehydrogenase and Pyruvate decarboxylase
    • D. Alcohol decarboxylase and Hexokinase
  5. Lactic acid fermentation and Alcoholic fermentation are hazardous processes. Yeasts poison themselves to death when the concentration of alcohol reaches approximately:
    • A. 7%
    • B. 13%
    • C. 25%
    • D. 50%
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