Transport in Plants
| Description: Transport in Plants | |
| Number of Questions: 16 | |
| Created by: Sara Dalvi | |
| Tags: Transport in Plants Diffusion Facilitated Diffusion Active Transport Transpiration Water Potential in Plants Osmosis Plasmolysis Absorption of Water by Plants |
Diffusion is a means of transport in plants. Which of the following is not a property of diffusion?
Which of the following statements is/are false?
a. In rooted plants, the transport in xylem is multidirectional. b. Special proteins help moving substances across membranes without expenditure of ATP energy in facilitated diffusion. c. In active as well as passive transport, a major role is played by different proteins in the membrane.
Plants on land absorb huge amount of water from their leaves, but most of it is lost to the air through the leaves. This process is called
Proteins in the membrane are responsible for active transport. Which of the following is not a characteristic of active transport?
Which of the following statements is/are false?
a. The protoplasm of a cell is water in which different molecules are dissolved and suspended. b. Woody parts of a plant contain most of the water while soft parts contain very little water. c. Active transport is carried out by membrane proteins.
The water potential is denoted by the Greek symbol Psi. Which of the following is the unit of water potential?
In plants, bulk flow is the movement of substances in bulk or en masse from one point to another. In which of the following ways can it be achieved?
a. Positive hydrostatic pressure gradient b. Negative hydrostatic pressure gradient c. Positive concentration gradient
Match the following:
| a. Symport | 1. In this process, both the molecules move in opposite directions. |
| b. Antiport | 2. In this process, both the molecules cross the membrane in the same direction. |
| c. Uniport | 3. In this process, a molecule moves across a membrane, independent of other molecules. |
In a plant cell, which of the following is/are not a determinant of the movement of molecules in or out of the cell?
a. Cell membrane b. Tonoplast c. Cell wall
The higher plants have specialised vascular tissues called xylem and phloem. Xylem is not associated with the translocation of which of the following substances?
In which of the following ways do substances move over small distances in plants?
a. Diffusion b. Cytoplasmic streaming c. Translocation
Transpiration is the evaporative loss of water by plants. Which of the following is not a function of transpiration?
In decidous plants, older dying leaves export much of their mineral content to other parts. Which of the following elements is not remobilised?
Which of the following statements is/are false?
a. Transpiration is the evaporative loss of water by plants through the stomata in the leaves. b. Pinus seeds cannot germinate and establish without the presence of mycorrhizae. c. The inner wall of each guard cell is thin and non-elastic.
Match the following:
| a. If the external solution is more concentrated than the cytoplasm, it is said to be | 1. Hypertonic |
| b. If the external solution is more dilute than the cytoplasm, it is said to be | 2. Isotonic |
| c. If the external solution balances the osmotic pressure of the cytoplasm, it is said to be | 3. Hypotonic |
Which of the following is impervious to water because of a band of suberised matrix called the casparian strip?