Osmotic Relations of Cells Quiz
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Questions and Answers

What happens to the net movement of water into a fully turgid cell?

  • It is stopped (correct)
  • It becomes zero
  • It decreases
  • It increases

What happens to the turgor of a flaccid cell?

  • It becomes negative
  • It decreases
  • It increases
  • It becomes zero (correct)

What happens to vacuolated parenchymatous cells in a plasmolysed state?

  • They remain unchanged in volume
  • They burst
  • They increase in volume
  • They shrink in volume (correct)

What is the relationship between water potential, osmotic potential, and pressure potential in a fully turgid cell?

<p>Water potential is equal to osmotic potential + pressure potential (B)</p> Signup and view all the answers

What is the water potential of a fully turgid cell?

<p>Zero (D)</p> Signup and view all the answers

What happens to the turgor of a flaccid cell?

<p>It becomes zero (D)</p> Signup and view all the answers

What occurs when vacuolated parenchymatous cells are placed in solutions of sufficient strength?

<p>The protoplast decreases in volume (C)</p> Signup and view all the answers

What is the relationship between osmotic potential and pressure potential in a plasmolysed cell?

<p>Osmotic potential is zero and pressure potential is negative (D)</p> Signup and view all the answers

What is the main function of pectins in the middle lamella?

<p>To aid in cell adhesion by binding cell walls of adjacent cells (A)</p> Signup and view all the answers

What is the primary component of the primary cell wall?

<p>Cellulose microfibrils (D)</p> Signup and view all the answers

Which layer of the cell wall is formed after the primary cell wall has stopped dividing and growing?

<p>Secondary cell wall (B)</p> Signup and view all the answers

What is the main function of the primary cell wall?

<p>To provide strength and flexibility needed for cell growth (B)</p> Signup and view all the answers

What is unique to some secondary cell walls?

<p>The presence of lignin (D)</p> Signup and view all the answers

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Flashcards

Net water movement in turgid cell?

Completely stops.

Turgor of flaccid cell?

Zero.

Plasmolysed parenchymatous cell?

Shrinks in volume.

Water potential in fully turgid cell?

Equal to osmotic potential plus pressure potential.

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Turgor of plasmolysed cell?

Zero.

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Plasmolysed vacuolated cell?

Protoplast shrinks.

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Osmotic potential in plasmolysed cell?

High, and pressure potential is negative.

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Pectin function in middle lamella?

Binds adjacent cell walls.

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Primary cell wall component?

Cellulose microfibrils

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Secondary cell wall formation?

After primary cell wall growth stops.

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Primary cell wall function?

Provides strength and flexibility for cell growth.

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Unique feature of some secondary cell walls?

Presence of lignin.

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Water potential of a fully turgid cell

Zero

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Water potential definition

The potential energy of water relative to pure water.

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Osmotic potential definition

The tendency of water to move from an area of high water potential to one of lower water potential through a semi permeable membrane.

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