Plant Physiology MCQs | Plant Physiology MCQs and Answers for competitive exams

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Questions
81 Main function of lenticel is
A transpiration
B guttation
C gaseous exchange
D bleeding

Answer: gaseous exchange
82 Choose the correct match Bladderwort, sundew, venus flytrap:
A Nepenthes, Dionea, Drosera
B Nepenthes, Utricularia, Vanda
C Utricularia, Drosera, Dionea
D Dionea, Trapa, Vanda

Answer: Utricularia, Drosera, Dionea
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83 Seed dormancy is due to the
A ethylene
B abscisic acid
C IAA
D starch

Answer: abscisic acid
84 Cellular totipotency is demonstrated by
A only gymnosperm cells
B all plant cells
C all eukaryotic cells
D only bacterial cells

Answer: all plant cells
85 Which one of the following concerns photophosphorylation?
A ADP + AMP ATP
B ADP + Inorganic PQ,
C ADP + Inorganic P04 ATP
D AMP + Inorganic PQ, ATP

Answer: ADP + Inorganic PQ,
86 ABA is involved in
A shoot elongation
B increased cell division
C dormancy of seeds
D root elongation

Answer: dormancy of seeds
87 In soil, water available for plants is
A gravitational water
B chemically bound water
C capillary water
D hygroscopic water

Answer: capillary water
88 Carbon dioxide acceptor in C3-plants is
A PGA
B PEP
C RuDP
D none of these

Answer: RuDP
89 The first step for initiation of photosynthesis will be
A photolysis of water
B excitement of chlorophyll molecules due to absorption of light
C ATP formation
D glucose formation

Answer: excitement of chlorophyll molecules due to absorption of light
90 When the plants are grown in magnesium deficient but urea rich soil, the symptoms expressed are
A yellowish leaves
B colourless petiole
C dark green leaves
D shoot apex die

Answer: yellowish leaves

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