Plant Water Transport
Questions about osmosis, water potential, turgidity, xylem transport, and water absorption mechanisms in plants
Questions
The form and structure of a growing cell is maintained because of
- osmosis
- plasmolysis
- turgidity
- wall pressure
In a hypertonic solution, a cell's water pressure
- increases
- first increases and then decreases
- decreases
- does not change
In a plant cell, OP is equal to
- Diffusion Pressure Deficit + Turgor Pressure
- Diffusion Pressure Deficit - Turgor Pressure
- Turgor Pressure - Diffusion Pressure Deficit
- Turgor Pressure - Diffusion Pressure
During rainy season, doors made of wood generally swell up due to
- osmosis
- imbibition
- bad quality of wood
- poor workmanship
A cell undergoes plasmolysis after being kept in a hypertonic solution. What will be present between cell wall and plasma lemma?
- Hypertonic solution
- Air
- Hypotonic solution
- Isotonic solution
Which of the following is true concerning the water potential of a plant cell?
- It is higher than air
- It becomes higher when K+ ions are actively moved into the cell
- It is equal to zero when the cell is in pure water and turgid
- It becomes lower after the uptake of water by osmosis
When a cell is fully turgid, which of the following will be zero?
- Wall Pressure
- Suction Pressure
- Osmotic Pressure
- Turgor Pressure
Cell A with OP = 6 and TP = 5 is surrounded by the cells with OP = 3 and TP = 1. What will be the direction of water movement?
- From other cells to cell A
- Water will not move
- Water will move up
- From cell A to other cells
Which of the following statements is incorrect?
- Water and inorganic salts are taken simultaneously by root hairs
- Plants take in small quantity of mineral salts through soil water
- Roots are the main absorbing organs of plants
- Plants absorb only one thing at a time, water or inorganic salts
A freshly cut potato chip is put into a strong solution of sugar. Later, it will be found
- flaccid
- turgid
- more full of starch
- more full of sugar
A cell placed in a strong salt solution will shrink because
- mineral salts will break the cell wall
- salt water will enter the cell
- water comes out by exosmosis
- cytoplasm will decompose
The movement of water from one cell of the cortex to adjacent one, in the roots, is due to
- accumulation of inorganic salts in the cells
- accumulation of organic compounds in the cells
- chemical potential gradient
- water potential gradient
The principal pathway by which water is translocated in angiosperms is
- xylem vessel system
- sieve tubes members of phloem
- xylems and phloem
- sieve cells of phloem
In soil, water available to the plants' root is
- hygroscopic water
- capillary water
- gravitation water
- colloid water
If the cut end of a tree is put in eosin solution, then the
- leaves remain fresh, but ascent of sap stops
- phloem gets colored because of ascent of sap
- xylem elements get stained showing ascent of sap
- ascent of sap stops
The initial stage of water absorption by root cells is by
- absorption
- imbibition
- osmosis
- respiration
Which of the following is connected with transport of water in plants?
- Phloem
- Xylem
- Epidermis
- Cambium
The stomata in angiosperms open and close due to
- the presence of gases inside the leaves
- their genetic constitution
- turgor pressure of guard cells
- turgor pressure of subsidiary cells
That the cell wall is permeable can be best deduced from the passage of water and mineral salts from
- root hairs into cortical cells
- pericyle cells into tracheal elements
- cortical cells into the pericycle
- soil into root hairs
Turgidity of the cells is maintained by
- wall pressure
- turgor pressure
- diffusion pressure
- osmotic pressure