Top 150+ Solved Transport in Plants MCQ Questions Answer
Q. Which one option does not involve osmosis ? (MPPMT 1991)
a. Water passing from one xylem element to the other above it.
b. Water passing from soil to root hair
c. Water passing into mesophyll cell from xylem
d. Water passing from root hair cell to cortical cell
Q. A bottle filled with previously moistened mustard seeds and water was screw capped tightly andkept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is
a. Diffusion
b. Imbibition
c. Osmosis
d. DPD (CBSE 1990)
Q. When concentration of solutes is low in the soil, absorption of water is (CMPT 1987, KCET 2007)
a. Stopped
b. Increased
c. Retarded
d. Normal
Q. Guard cells differ from epidermal cells in having. (CPMT 1993, CBSE 2011)
a. Mitochondria
b. Vacuoles
c. Cell wall
d. Chloroplast
Q. Wilting in plants occurs when (CPMT 1987, 1991, 2002, AFMC 2005, BHU 2006, WB 2008)
a. Phloem is blocked
b. Xylem is removed / blocked
c. Pith is removed
d. A few leaves are removed
Q. Guttation is the process of elimination of water from plants through (BHU 1986, JIPMER 1987, MPPMT 1995, Orissa 2003)
a. Stomata
b. Hydathodes
c. Lenticels
d. Wounds
Q. What is the action spectrum of transpiration ? (RPMT 1995, CET Chd. 2006)
a. Green and ultraviolet
b. Orange and red
c. Blue and far red
d. Blue and red
Q. Stomata open during day time because the guard cells (CPMT 1987)
a. Produce osmotically active sugars or organic acids
b. Are thin walled
c. Are bean shaped
d. Have to help in gaseous exchange
Q. Stomatal opening is under the control of (KCET 1988, Manipur 2005)
a. Epidemal cell
b. Pallisde cells
c. Spongy cells
d. Guard cells
Q. It is produced during water stress that brings stomatal closure. (AMU 1992, CBSE 1993, 1994, 2001, RPMT 2000, JIPMER 2000, Orissa 2009, MP PMt 1992)
a. Ethylene
b. Abscisic acid
c. Ferulic acid
d. Coumarin
Q. Transpiration is least in (CBSE 1998, BHU, 1987, KCET 2006)
a. Good soil moisture
b. Hight wind velocity
c. Dry environment
d. High atmospheric humidity
Q. Transpiration is high in (MP PMT 1993)
a. Rainy season
b. Winter
c. High temperature
d. Low wind velocity
Q. Potometer is an instrument that measures (Pb. PMT 1998, Manipur 2005)
a. Respiration
b. Photosynthesis
c. Growth
d. Transpiration
Q. Wilting appears due to excessive. (MP PMT 1989, RPMT 2000, AFMC 2001, Pb. PMT 2001)
a. Respiration
b. Photosynthesis
c. Absorption
d. Transpiration