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Plant Physiology MCQ

177 MCQ questions with answers and explanations · page 4 of 8

Test yourself▶ 25 question test▶ 50 question test

Q76. Molybdenum deficiency affects the activity of-

  1. ANitrogenase
  2. BNitrate reductase
  3. CChlorate reductase
  4. DAll of the given options
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Answer: D) All of the given options

Q77. Plant purify air during-

  1. APhotosynthesis
  2. Brespiration
  3. CTranspiration
  4. DDesiccation
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Answer: A) Photosynthesis

Q78. Translocation of carbohydrate nutrient usually occurs in the form of-

  1. AGlucose
  2. BMaltose
  3. CStarch
  4. DSucrose
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Answer: D) Sucrose

Q79. Which one of the following is the process involved in photosynthesis ?

  1. APotential energy is related to from free energy
  2. BFree energy is converted into Potential energy and stored
  3. CFood is oxidized to release carbon dioxide and water
  4. DOxygen is taken and carbon dioxide and water vapour are given out
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Answer: B) Free energy is converted into Potential energy and stored

Q80. Translocation of food occur through -

  1. ASieve tube/Phloem cell
  2. BTracheids
  3. CXylem vessels
  4. DLetex duct
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Answer: A) Sieve tube/Phloem cell

Q81. Photosynthesis proceeds in sequence of -

  1. ADark phase and light phase
  2. BLight phase alone
  3. CLight phase and dark phase
  4. DDark phase alone
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Answer: C) Light phase and dark phase

Q82. ln plants which one of the following gases is released during photosynthesis ?

  1. ACarbon dioxide
  2. BOxygen
  3. CHydrogen
  4. DMethane
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Answer: B) Oxygen

Q83. A biological process in which sugar is oxidised to release energy -

  1. ATranspiration
  2. BRespiration
  3. CPhotosynthesis
  4. DFermentation
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Answer: B) Respiration

Q84. Carbon dioxide is released by plant during -

  1. APhotosynthesis
  2. BAsent of sap
  3. CTranspiration
  4. DRespiration
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Answer: D) Respiration

Q85. Which of the following plant shows chloroplast dimorphism

  1. ARice
  2. BWheat
  3. CSugar beet
  4. DSugarcane
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Answer: D) Sugarcane

Q86. ATP mean -

  1. AAdesino tri phosphate
  2. BAdenine tri phosphate
  3. CAdenosine tri phosphate
  4. DAdenosine tetraphosphate
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Answer: C) Adenosine tri phosphate

Q87. ATP is -

  1. AAn enzyme which during about oxidation
  2. BHarmone
  3. CA protein
  4. DA molecule which contain high energy phosphate bond
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Answer: D) A molecule which contain high energy phosphate bond

Q88. After respiration the conversion of energy is mainly in the form of-

  1. AADP
  2. BATP
  3. CAMP
  4. DGlucose
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Answer: B) ATP

Q89. Both respiration and photosynthesis require-

  1. ASunlight
  2. BChlorophyII
  3. CGlucose
  4. DCytochromes
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Answer: D) Cytochromes

Q90. Energy currency of cell is-

  1. AAMP
  2. BATP
  3. CRNA
  4. DDNA
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Answer: B) ATP

Q91. Mitochondria are sites of-

  1. AOxidative Phosphorylation
  2. BPhotolysis
  3. CPhosphorylation
  4. DStarch synthesis
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Answer: A) Oxidative Phosphorylation

Q92. Respiration is-

  1. AEndothermic process
  2. BExothermic process
  3. CAnabolic process
  4. DEndagenic process
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Answer: B) Exothermic process

Q93. In anaerobic respiration-

  1. AOxygen is absorbed
  2. BOxygen is released
  3. CCarbon dioxide is released
  4. DCarbon dioxide is absorbed
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Answer: C) Carbon dioxide is released

Q94. Fermentation is-

  1. AAnearobic respiration
  2. BIncomplete oxidation of carbohydrate
  3. CComplete oxidation of carbohydrate
  4. DNone of these
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Answer: A) Anearobic respiration

Q95. Instaneous source of energy is-

  1. AGlucose
  2. BFats
  3. CProteins
  4. DAmino acids
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Answer: A) Glucose

Q96. The net gain of energy grom one gram mole of glucose during aerobic respiration is-

  1. A2 ATP
  2. B4 ATP
  3. C38 ATP
  4. D40 ATP
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Answer: C) 38 ATP

Q97. In plant energy is produced during the process of-

  1. APhotosynthesis
  2. BTranspiration
  3. CRespiration
  4. DWater absorption
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Answer: C) Respiration

Q98. Different steps in respiration are controlled by-

  1. AAuxins
  2. BSugar
  3. CEnzymes
  4. DKinins
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Answer: C) Enzymes

Q99. Anaerobic respiration takes place-

  1. AIn absence of oxygen
  2. BIn presence of oxygen
  3. CIn presence of carbon dioxide
  4. DIn absence of carbon dioxide
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Answer: A) In absence of oxygen

Q100. Respiration can occur in the absence of oxygen in-

  1. ASolanum tubersosum
  2. BSpirogyra
  3. CYeast
  4. DAll the above
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Answer: C) Yeast

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