Plant Cell Walls and Cell Shape

Which statement accurately describes the orientation of cellulose microfibrils and its effect on plant cell morphology?

The primary function of lignin in the secondary cell wall is to facilitate water transport through the cell.

How is the synthesis of cellulose microfibrils coordinated with the synthesis and delivery of pectin and hemicellulose in the primary cell wall?

The extensibility of plant cells is controlled by ______ that are secreted by the cell wall.

Match the following processes with their location in a plant cell:

What is the primary role of the cell wall in regulating cell shape?

Plant cells utilizes active transport to facilitate the movement of water into the vacuole.

Describe the mechanism by which extensin cross-linking affects the mechanical properties of the plant cell wall.

________, found in secondary cell walls, confers strength and rigidity and also acts to exclude water.

Match the plant cell wall component with its primary role:

Plasmodesmata facilitate cell communication by:

The presence of a secondary cell wall is a universal characteristic of all plant cells.

Outline the role of vacuoles in maintaining cell turgor and explain how this contributes to plant structural support.

When a plant cell is placed in a hypotonic solution, water enters the cell, causing the ________ to expand and push against the cell wall, a phenomenon known as ________ pressure.

Match the following terms with their descriptions related to water potential in plant cells:

Which of the following is NOT a component of the primary cell wall?

Desmotubules, extensions of the endoplasmic reticulum, do not pass through the plasmodesmata.

Explain how the process of exocytosis contributes to the synthesis and delivery of cell wall components.

The enzyme ________ is crucial for the cellulose ______ process at the plasma membrane.

Match each stage of cell wall synthesis with the cellular location where it occurs:

What effect does extensin cross-linking have on the dehydration of cellulose?

When vacuoles take up water, this is known as active transport.

What are the two phases of cell wall structure?

______ has properties of being able to bind water and has gel-like properties.

Match each term with its definition:

A plant cell is placed into an environment with increased water, what occurs?

The secondary cell wall provides more structural support than the primary plant cell wall.

What are the main compositional differences between the plant primary and secondary cell walls?

If a plant is under mild drought stress, the vacuoles will ______.

Match the location with the cell structures present there.

What is the role of the cell wall?

Wilting occurs in a plant cell due to lack of water.

What cell structures could viruses use to travel from one plant cell to another?

Annual production of cell walls are estimated to be ______ tons/year.

Match the following cell walls with the statement which is true about them:

What effect do extensins cross linkings of polysaccharides have on the extensibility of their cell walls?

Cellulose are linked by proteins.

Why are the vacuoles important in the cell wall?

Vacuoles take up water by _________ to maintain turgid cell.

Match the following properties with their description.

During the coordinated synthesis of the primary cell wall, which component is synthesized in the rough endoplasmic reticulum (rER) and then glycosylated by the Golgi apparatus before being transported to the plasma membrane?

If a plant cell is placed in a hypotonic solution, the cell wall will prevent the cell from bursting due to excessive water uptake, which results in turgor pressure.

How does the orientation of cellulose microfibrils in the primary cell wall influence the direction of cell expansion and the resulting cell morphology?

The extensibility of plant cells is controlled by ______ cross-linking, which is secreted by the cell wall and whose action dehydrates the cell wall, reducing extensibility and increasing its strength.

Match the cell wall component with its description: