List of top Plant Biotechnology Questions on Plant Physiology

Which inorganic form(s) of nitrogen do plants assimilate?
A. Amino acids
B. $NH_{4}^{+}$
C. ${NO_{3}}^{-}$
D. ${NO_{2}}^{-}$
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Which of the following mechanism is not causing somaclonal variations?

Plant somatic embryogenesis is a process that forms:

What is the function of leghemoglobin present in root nodulus of leguminous plants?

Plants cannot absorb molecular nitrogen from the atmosphere because

Examples of circadian rythm
(A). Seed germination in cereals once favourable conditions are met
(B). Root growth of plants into the soil
(C). Opening and closing of stomata
(D). Photosynthetic activity
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In higher plants, zeatin is the most abundunt cytokinin. In addition, cytokinins can also occur as
(A). Riboside
(B). Thidiazuron
(C). Ribotide
(D). Glycoside
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Identify the popular farming method gaining popularity among farmers that uses technology to manage crop production to maximize crop yield in the present day context

Identify crops based on water requirement
(A). Maize $<$ Sugarcane $<$ Cowpea
(B). Sunflower $<$ Pearl millet $<$ Soybean
(C). Rice $<$ Sorghum $<$ Redgram
(D). Pineapple $<$ Amaranthus $<$ Cotton
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The extent of water absorbed by plant roots, carried through the plant and that gets evaporated from leaf surface is:

How does the pressure flow hypothesis explain the movement of sugars in the phloem?

In crops that grow upto a height of about 1 meter, component of water potential that become non-significant for cell growth after cell division is
(A). Solute potential
(B). Pressure potential
(C). Matric potential
(D). Gravitational potential
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Identify the long day plants
(A). Sugarbeet
(B). Tobacco
(C). Cotton
(D). Potato
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Which wavelength of light is primarily responsible for inducing the opening of stomata in plant leaves?

Which one of the following is not a component of thylakoid integral membrane protein?

Pressure potential in the xylem of an actively transpiring plant is

Which one the following statements is correct?
(A). Seeds can remain dormant for indefinite periods until environmental conditions are favorable for germination
(B). Seed dormancy in crops can be broken by mechanical scarification or chemical treatments
(C). Light is a necessary environmental factor for the germination of all seeds
(D). A thick seed coat and impermeability can prevent water and gases from entering the seed, delaying germination.
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The organelles involved in the process of photorespiration are
(A). Chloroplast
(B). Mitochondria
(C). Peroxisomes
(D). Vacuole
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The breakdown product of DNA (capable of inducing cell division) which was later identified as cytokinin is

Exudation of sap from the cut surface of the stem of a well-watered herbaceous plant is due to the positive pressure in the xylem, which is termed as

Which hormone is primarily responsible for the inhibition of lateral bud growth and maintenance of apical dominance?

What type of plants require a period of uninterrupted darkness to induce flowering?

Which one of the following is vascular tissue?

What is the primary environmental cue that triggers flowering in many plants?