CBSE Class 11 Biology Transport in Plants Worksheet Set 02

MULTIPLE CHOICE QUESTIONS

Question. The main function of phloem is translocation of
(a) food
(b) water 
(c) mineral
(d) air
Answer. A

Question. Hydroponics is 
(a) nutrient less culture
(b) water less culture
(c) soilless culture
(d) none of these
Answer. C

Question. During Na+ – K+ pump 
(a) 3Na+ and 2K+ are transported
(b) 1Na+ and 2K+ are transported
(c) 3 Na+ and 3K+ are transported
(d) Depends on requirement of cell
Answer. A

Question. Excessive loss of water causes wilting of leaves, it can be prevented by : 
(a) Keeping the plant in bright light
(b) Spraying the plant with alcohol
(c) Applying vaseline on the leaf surface
(d) Adding high amounts of fertilizers to the soil
Answer. C

Question. Water potential of pure water and its solution are 
(a) 0 and 1
(b) 0 and 0
(c) 0 and more than one
(d) 0 and less than 1.
Answer. D

Question. In which method of transport in plasma membrane does not require carrier molecule?
(a) Active transport
(b) Facilitated diffusion
(c) Simple diffusion
(d) Na+ – K+ pump
Answer. C

Question. Seed increase in its volume by the adsorption of water through
(a) Osmosis
(b) Plasmolysis
(c) Imbibition
(d) Diffusion
Answer. C

Question. Minerals are known to enter the plant root by means of a number of mechanisms, including all except one of the following. Which one of the following is NOT a mechanism for moving minerals into roots? 
(a) Foliar feeding
(b) Active transport
(c) Proton (H+) pump
(d) Cation exchange
Answer. A

Question. If a cell A with D.P.D. 4 bars is connected to cell B, C, D whose O.P. and T.P. are respectively 4 and 4, 10 and 5 and 7 and 3 bars, the flow of water will be 
(a) A and D to B and C
(b) A to B, C and D
(c) B to A, C and D
(d) C to A, B and D
Answer. C

Question. A boy is studying transport of a certain type of molecules into cell. He finds that transport slows down when the cells are poisoned with a chemical that inhibits energy production. Under normal circumstances, the molecules studied by the boy is probably transported by 
(a) simple diffusion
(b) osmosis
(c) active transport
(d) facilitated diffusion
Answer. C

 

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason. While answering these questions, you are
required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Waxy and cutin coating on plant parts reduce the transpiration.
Reason : These adaptation are found in xerophytes. 
Answer. A

Question. Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.
Reason : Casparian strips in endodermis are suberized. 
Answer. A

Question. Assertion :When the ambient temperature is high and soil contains excess of water, the plants tend to lose water in the form of droplets from lenticels.
Reason : Root pressure regulates the rate of loss of water form lenticels. 
Answer. D

Directions : Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : Upward movement of water is called ascent of sap.
Reason : Upward movement of water occurs through xylem and phloem. 
Answer. C

Question. Assertion : Long distance flow of photo assimilates in plants occurs through sieve tubes.
Reason : Mature sieve tubes have parietal cytoplasm and perforated sieve plates.
Answer. A

Question. Assertion : Light is very important factor in transpiration.
Reason : Light induces stomatal opening and darkness closing of stomata. Therefore, transpiration increases in light and decreases in dark.
Answer. A

 

Answer. The net direction and rate of osmosis depends on the pressure gradient and concentration gradient.

 

Answer. Thistle funnels are used to add small volumes of liquids to an exact position.

 

Answer. Turgor pressure exerted by fluid in a cell that presses the cell membrane against the cell wall.

 

Answer. Phloem tissues are composed of sieve tube cells.

 

Answer. Girdling, also called ring-barking is the complete removal of a strip of bark from around the entire circumference of either a branch or trunk of a woody plant.