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Water Potential in Mature Cells Quiz

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Questions and Answers

What is the function of the tonoplast in a cell?

Provides structural support to the plasma membrane

Helps in cell division by forming the cell plate

Synthesizes proteins for cell growth

Regulates the movement of water and solutes in and out of the vacuole (correct)

Placing water under tension in a plant cell would have what effect on the water potential?

Increases the water potential

Reduces the water potential (correct)

Increases free energy

Has no effect on water potential

What is the main function of the cytoplasm in a cell?

Contains organelles like mitochondria and ribosomes (correct)

Stores water and nutrients for the cell

Acts as a barrier to protect the nucleus

Regulates cell growth and division

How does adding solutes to a solution affect the water potential?

Decreases free energy and increases water potential Signup and view all the answers

Which part of a plant cell acts as a selective barrier regulating the movement of substances into and out of the cell?

Tonoplast Signup and view all the answers

Placing a flaccid cell in a weak sucrose solution would most likely result in what movement of water?

No movement of water into or out of the cell Signup and view all the answers

What is the relationship between hydrostatic pressure, solute potential, and water potential in a plant cell?

Hydrostatic pressure is positive, solute potential is negative, and water potential is the sum of the two Signup and view all the answers

How does wilting affect turgor pressure in plant cells?

Turgor pressure decreases as cells dry out and lose access to water Signup and view all the answers

What causes the process of plasmolysis in plant cells?

Severe dehydration or wilting Signup and view all the answers

How does the disequilibrium in water potential affect cell volume?

It drives water entry into the cell, increasing cell volume by stretching the wall Signup and view all the answers

What role does turgor pressure play in cell wall expansion?

Turgor pressure creates a stress that loosens the cell wall for expansion Signup and view all the answers

What process must occur to fully restore turgor pressure in a plant cell after expansion?

Increasing solute intake into the cell Signup and view all the answers

What is the term for the pressure exerted by water inside the vacuole of a plant cell?

Turgor pressure Signup and view all the answers

Which component of a plant cell is primarily responsible for maintaining turgor pressure?

Tonoplast Signup and view all the answers

In plant cells, what is the primary function of the tonoplast?

Controlling water balance in the vacuole Signup and view all the answers

Which structure in a plant cell is directly involved in the uptake and storage of water?

Vacuole Signup and view all the answers

Among the listed components, which one acts as a selective barrier regulating the movement of substances in and out of a plant cell?

Plasma membrane Signup and view all the answers