Free Transport In Plants (Weekly Quiz: 2) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Question-1

Guttation occurs through

(a) hydathodes

(b) lenticels

(c) periderm

(d) stomata

Question-2

A plasmolysed cell can be deplasmolysed by placing it in

(a) Hypertonic solution

(b) Isotonic solution

(c) Saturated solution

(d) Pure water or hypotonic solution

Question-3

Which of the following is a difference between transport by xylem and transport by phloem?

(a) Transpiration moves phloem sap but not xylem sap.

(b) Active transport moves xylem but not phloem sap.

(c) Xylem sap moves up; phloem sap moves up and down.

(d) Xylem moves from sugar source to sink but phloem does not.

Question-4

Cell wall is

(a) Impermeable

(b) Permeable

(c) Semi-permeable

(d) Selectively permeable

Question-5

Potometer works on the principle of

(a) root pressure

(b) amount of water absorbed equals the amount transpired

(c) osmotic pressure

(d) potential difference between the tip of the tube and that of the plant.

Question-6

When a root absorbs minerals from a region of lower concentration to a region of higher concentration, and need energy then this type of absorption is called

(a) facilitated diffusion

(b) passive absorption

(c) active absorption

(d) osmosis

Question-7

A column of water within xylem vessels of tall trees does not break under its weight because of:

(a) Lignification of xylem vessels

(b) Tensile strength of water

(c) Positive root pressure

(d) Dissolved sugars in water

Question-8

Transpiration and root pressure cause water to rise in plants by

(a) pulling it upward

(b) pushing and pulling it, respectively

(c) pushing it upward

(d) pulling and pushing it, respectively.

Question-9

Water potential of pure water and its solution are

(a) 0 and 0

(b) 0 and 1

(c) 0 and more than 1

(d) 0 and less than 1.

Question-10

Which of the following explains why the leaf cells of plants within the family Crassulaceae have a lower pH at night than during the day ?

(a) Carbon dioxide in these plants is chemically fixed in organic acids during the night, but these acids are metabolized during the day.

(b) These plants keep their stomata open at night but closed during the day.

(c) These plants have a buildup of abscisic acid at night.

(d) Because their stomata are closed during the day, excess carbon dioxide within the leaf forms carbonic acid.