The aerobic oxidation of one molecule of NADH through the mitochondrial respiratory chain gives rise to the synthesis of
A. 3 moles of FAD
B. 3 moles of GTP
C. 3 moles of ATP
D. 2 moles of ATP
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Wilt of arhar is a
A. Water borne disease
B. Soil borne disease
C. Air borne disease
D. Seed borne disease
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Of the five petals of the corolla, if, the largest encloses the two laterals which in turn, overlap the two smallest fused petals then the corolla is said to be
A. Gamopetalous
B. Papilionaceous
C. Leguminaceous
D. Convolvulaceous
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During microgametogenesis, the two gametic nuclei are produced by
A. Meiosis of the tube nucleus
B. Meiosis of the generative nucleus
C. Mitosis of the generative nucleus
D. Mitosis of the vegetative cell
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Consider the following statements.
1. Fertilisation of the egg takes place inside the embryo sac.
2. Fertilised ovum form the embryo.
3. Endosperm is generally triploid.
Which of the statements given above are correct?
A. 1, 2 and 3
B. 1 and 2
C. 2 and 3
D. 1 and 3
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Which one of the following is the process involved in photosynthesis?
A. Potential energy is released to form free energy
B. Free energy is converted into potential energy and stored
C. Food is oxidized to release carbon dioxide and water
D. Oxygen is taken and carbon dioxide and water vapour are given out
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Excess amount of absorbed water by plants is liberated out by
A. evaporation
B. osmosis
C. diffusion
D. transpiration
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A clone is a group of individuals obtained through
A. self-pollination
B. hybridisation
C. micropropagation
D. cross-pollination
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Consider the following statements regarding mangrove vegetation and choose the correct answer:
1. True mangrove vegetation occurs in open beach or in sandy or rocky shores of the sea
2. The vegetation rarely develops in wet tropics where the tropical rain forest is the climax vegetation
3. In world, the eastern mangrove is found on the coasts of Indian ocean and the western part of the Pacific ocean
4. Most of the species of mangrove formations are gregarious in habit
A. Only 1, 2 and 3 are true
B. Only 2 and 4 are true
C. Only 3 and 4 are true
D. Only 2, 3 and 4 are true
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Deposition of calcium carbonate in water is called
A. Marl
B. Coral
C. Attol
D. Pearl
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When the fruit is derived from a monocarpellary superior, unilocular ovary with marginal placentation, it is known as
A. Lomentum
B. Cremocarps
C. Carcerulus
D. Double samara
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The optimum temperature for the formation of zoospore in Phytophthora infestans is
A. 20° C
B. 4° C
C. 15° C
D. 12° C
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Which of the following viruses is known as Solanum virus-3 which causes super mild mosaic?
A. Potato virus-A
B. Potato virus-X
C. Potato virus-Y
D. None of the above
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The hormone related to drought tolerance is
A. Abscisic acid
B. Gibberellin
C. Indole acetic acid
D. Cytokinin
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Water potential of protoplasm is equal but opposite in sign to the
A. Diffusion pressure
B. Turgor pressure
C. Osmotic pressure
D. Diffusion pressure deficit
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According to Cajlachjan's ideas, long-day plants on non-inductive cycles have a sufficient amount of
A. Gibberellin
B. Cytokinin
C. Anthesin
D. All of the above
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Germination of a seed will occur only
A. When the embryo development is complete
B. During the embryo development
C. Before the beginning of embryo development
D. Either B or C
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Which of the following is a seed borne disease?
A. Green ear disease of bajra
B. Blast of rice
C. Black arm of cotton
D. Root knot of tomato
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Which one of the following gases is used by plants in photosynthesis?
A. Ammonia
B. Carbon dioxide
C. Chlorine
D. Sulphur dioxide
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Which of the following is the fundamental unit of phytosociology, being a plant community of certain floristic composition, of uniform habitat conditions and of uniform physiognomy?
A. Consociation
B. Association
C. Succession
D. Afforestation
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