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251.

Carbohydrates are present in the plasmalemma in the form of:

A.	Starch	B.	Cellulose
C.	Hemicellulose	D.	Phospholipids (glycolipids) and phosphoproteins (glycoproteins)

252.

The end products of respiration in plants are:

A.	Starch and O2	B.	H2O and energy
C.	CO2, H2O and energy	D.	Sugar and O2

253.

Guard cells are found in:

A.	Stomata	B.	Root tips
C.	Ovary	D.	Lenticels

254.

Transpiration occurs through:

A.	Stomata	B.	Cuticle
C.	Lenticles	D.	All the above

255.

The protoplasm theory was established in plant cell by:

A.	Strasburger	B.	Robert Brown
C.	De Bary	D.	Max Schultze

256.

The transpiration is regulated by the movements of:

A.	Subsidiary cells of the leaves	B.	Guard cells of the stomata
C.	Mesophyll tissue cells	D.	Epidermal cells of the leaves

257.

Cylokinins have the ability to:

A.	Substitute cold treatment	B.	Cause root formation
C.	Cause morphogenesis	D.	Convert dwarf plants into tall plants

258.

Ripening of banana is accompanied with:

A.	Sudden rise in cytokinin	B.	Sudden rise in auxin
C.	Sudden rise in ethylene	D.	Sudden rise in gibberellin

259.

A bulk of nitrogen in nature is fixed by:

A.	Symbiotic bacteria	B.	Chemical industries
C.	Lightning	D.	Denitrifying bacteria

260.

The first event in photosynthesis is:

A.	Synthesis of ATP	B.	Photoexcitation of chlorophyll and ejection of electron
C.	Photolysis	D.	Release of oxygen