Transport in Plants NEET Questions

Transports in Plants NEET  Questions : 

1. Stomatal movement is not affected by : (NEET-2018)
(1) Temperature
(2) Light
(3) O2 concentration
(4) CO2 concentration
Answer: 3

2. Which of the following facilitates opening of stomatal aperture? (NEET-2017)
(1) Decrease in turgidity of guard cells
(2) Radial orientation of cellulose microfibrils in the cell wall of guard cells
(3) Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells
(4) Contraction of outer wall of guard cells
Answer: 2

3. The water potential of pure water is : (NEET-2017)
(1) Less than zero
(2) More than zero but less than one
(3) More than one
(4) Zero
Answer: 4

4. Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatal opening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using one of the following option : (NEET-I 2016)
(1) Both processes cannot happen simultaneously.
(2) Both processes can happen together because the diffusion coefficient of water and CO2 is different.
(3) The above processes happen only during night time.
(4) One process occurs during day time, and the other at night.
Answer: 2

5. Specialised epidermal cells surrounding the guard cells are called : (NEET-I 2016)
(1) Complementary cells
(2) Subsidiary cells
(3) Bulliform cells
(4) Lenticels
Answer: 2

6. A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap ? (NEET-II 2016)
(1) Low refractive index
(2) Absence of sugar
(3) Acidic
(4) Alkaline
Answer: 4

7. Which of the following criteria does not pertain to facillitated transport? (NEET-2013)
(1) Uphill transport
(2) Requirement of special membrane proteins
(3) High selectivity
(4) Transport saturation
Answer: 3