Plant Physiology MCQs and Answers for competitive exams

Questions

81 Main function of lenticel is

A transpiration

B guttation

C gaseous exchange

D bleeding

View Answer

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

View Answer

Answer: Utricularia, Drosera, Dionea

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83 Seed dormancy is due to the

A ethylene

B abscisic acid

C IAA

D starch

View Answer

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

View Answer

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

View Answer

Answer: ADP + Inorganic PQ,

86 ABA is involved in

A shoot elongation

B increased cell division

C dormancy of seeds

D root elongation

View Answer

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

View Answer

Answer: capillary water

88 Carbon dioxide acceptor in C3-plants is

A PGA

B PEP

C RuDP

D none of these

View Answer

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

View Answer

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

View Answer

Answer: yellowish leaves

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