What is correct about the movement of substances across the membrane in facilitated diffusion?
1. It is an active transport.
2. It causes the transport of molecules from low concentration to high concentration.
3. It is insensitive to inhibitors.
4. It is a very specific transport.
The water logging capacity of garden soil will be determined by measuring the weight of
(1) soil by adding water and humus
(2) water saturated soil then heating the soil till it is dry and then measuring the weight of soil
(3) soil by adding water, boimass and humus
(4) soil from different locations with biomass.
The modified equation for water potential is:
The value of osmotic potential of an electrolyte is always
(1) more than non-electrolyte
(2) less than non-electrolyte
(3) same as non-electrolyte
(4) None of these
Identify the process taking place in this experiment.
(1) Ringing experiment for translocation of sap
(2) Demonstration of root pressure
(3) Eosin test to demonstrate ascent of sap
(4) Demonstration of transpiration
Osmosis is a type of
(1) imbibition of solution
(2) diffusion of solvent
(3) evaporation of water
(4) diffusion of solute
Which of the following statement is correct?
(1) DPD = OP - WP
(2) DPD = OP + WP
(3) DPD = WP - OP
(4) DPD= TP + OP
Who had proposed theory of cohesion and adhesion forces?
(1) Dixon and Jolly (1894)
(2) Dixon and Benson (1885)
(3) Dixon and Jolly (1950)
(4) Sir Jagdish Chandra Bose (1850)
Stomatal opening is affected by
(1) nitrogen concentration, carbon dioxide concentration and light
(2) carbon dioxide concentration, temperature and light
(3) nitrogen concentration, light and temperature
(4) carbon dioxide concentration, nitrogen concentration and temperature
Translocation of photosynthetic end products in seive tubes is
(1) 3-5 mm/h
(2) 3-5 cm/h
(3) 1-15 cm/h
(4) 60-100 cm/h