Which of the following elements are essental for the photolysis of water?
Ca and CI
Mn and CI
Zn and I
Cu and Fe
In C3-plants, the first stable product of photosynthesis during the dark reaction is
malic acid
oxaloacetic acid
3-phosphoglyceric acid
phosphoglyceraldehyde
In old trees or woody plants, transpiration occurs by means of
bark
cork
stomata
lenticels
The selective permeability identifies the process of
diffusion
osmosis
plasmolysis
imbibition
Which of the following is the initiating step in photosynthesis ?
ATP formation
glucose formation
photolysis of water
activation of chlorophyll by sunlight
Turgor pressure becomes equal to the wall pressure when
water leaves the cell
water enters the cell
no exchange of water takes place
solute goes from the cell into water
When a piece of potato is kept in ahighly concentrated salt solution, then
potato is plasmolysed
potato is deplasmolysed
potato cells get bursted
there is no effect due to istonic solution
When the fluid outside a cell has a greater concentration of a given molecule than the fluid inside the cell, the external fluid is
isotonic
hypotonic
hypertonic
both '1' and '2'
Suction pressure of root hair cell is eual to
WP
TP
OP
DPD
Lenticels and hydathodes are small pores with which of the following common attributes ?
they are always remain closed
they allow exchange of gases
their opening and closing is not regulated
they are found on the same organ of plants
