Top 150+ Solved Transport in Plants MCQ Questions Answer
Q. Transpiration is regulated by movement of (JIMER 2004)
a. Guard cell
b. Subsidiary cells
c. Epidermal cells
d. Mesophyll cells
Q. Rate of transpiration is reduced with (CPMT 1987, MPPMT 1999)
a. Rise in temperature
b. Decrease in light intensity
c. Increase in wind velocity
d. Increase in water uptake
Q. In terrestrial habitats, temperature and railfall conditions are influenced by (CBSE 1989)
a. Water transformation
b. Transpiration
c. Thermoperiodism
d. Translocation
Q. Conversion of starch to organic acids is required for (CBSE 1992)
a. Stomatal opening
b. Stomatal closing
c. Stomatal formation
d. Stomatal activity
Q. In guard cells when sugar is converted into starch, the stomatal pore (CBSE 1997)
a. Closed completely
b. Opens partiall
c. Opens fully
d. Remains unchanged
Q. Water will be absorbed by root hairs when the externael medium is (JIPMER 1986, AFMC 1993)
a. Hypotonic
b. Hypertonic
c. Isotonic
d. Viscous
Q. Root hairs occur in the zone of (Kerala 2003)
a. Cell division
b. Cell elongation
c. Cell maturatio
d. Mature cells
Q. Path of water movement from soil to xylem is (CPMT 1989, Kerala 2008)
a. Meta xylem - protoxylem - cortex - soil - roothair
b. Cortex - root hair - endodermis - pericycle - protoxylem - meta xylem
c. Soil - root hair - cortex - endodermis - pericycle - protoxylem - meta xylem
d. Pericycle - soil - root hair - cortex endodermis - protoxylem metaxylem
Q. Water in plants is transported by or ascent of sap takes place through (BHU 1991, DPMT 1987, CPMT 1983, 1996, MHTCET 2009)
a. Cambium
b. Phloem
c. Xylem
d. Epidermis
Q. Water rises in the stem due to (RPMT 2000)
a. Cohesion and transpiration pull
b. Turgor pressure
c. Osmotic pressure
d. Root pressure (negative)
Q. The principal pathway of water translocation in angiospermis is (CBSE 1990)
a. Sieve cell
b. Sieve tube elements
c. Xylem vessel system
d. Xylem and phloem
Q. Which contributes most to the transport of water from soil to the leaves of a tree ? (CPMT 1989, MPPMT 1989)
a. Root pressure
b. Cohesion of water and transpiration pull
c. Capillary rise of water inside xylem
d. Hydrolysis of ATP
Q. Cohesive force of water is due to (EAMCET 1989, EPMT 2005)
a. O-bond
b. OH-bonds
c. S-bonds
d. H-bonds
Q. Diffusion of water through selectively permeable membrane is (CPMT 1993)
a. Diffusion
b. Imbibation
c. Osmosis
d. Translocation