Transport Mechanisms in Yeast Cells

The video tutorial explores the behavior of yeast cells under a microscope. Initially, living yeast cells are observed, showing a pinkish-red color due to the uptake of colored substances. The video then contrasts this with dead yeast cells, which do not exhibit the same internal coloration. This difference is used to explain active transport, a process requiring energy to move substances into living cells, unlike passive processes such as diffusion or osmosis, which do not require energy and would allow color to penetrate dead cells.

What is the purpose of adding coloring to the yeast cells under the microscope?

• To change the color of the yeast cells

• To observe the movement of yeast cells

• To make the yeast cells more visible

• To identify living yeast cells

What does the presence of color inside the living yeast cells indicate?

• The cells are actively transporting substances

• The cells are diffusing substances

• The cells are dead

• The cells are undergoing osmosis

How do dead yeast cells differ from living yeast cells in terms of color?

• Dead cells are less visible

• Dead cells are more colorful

• Dead cells have no color inside

• Dead cells have color inside

Why do dead yeast cells not have color inside them?

• They are not exposed to coloring

• They do not undergo active transport

• They are too small to hold color

• They are not visible under the microscope

Which transport system requires energy to move substances across the cell membrane?

• Active transport

• Osmosis

• Diffusion

• Facilitated diffusion

What would happen if osmosis was responsible for the color in yeast cells?

• No cells would have color

• Only dead cells would have color

• Both living and dead cells would have color

• Only living cells would have color

What is the main difference between active transport and diffusion?

• Diffusion requires energy, active transport does not

• Neither require energy

• Active transport requires energy, diffusion does not

• Both require energy

What would you observe if facilitated diffusion was responsible for the color in yeast cells?

• Both living and dead cells would have color

• No cells would have color

• Only living cells would have color

• Only dead cells would have color

What is required for active transport to occur in yeast cells?

• No energy

• Energy

• Water

• Oxygen

What role does energy play in active transport?

• It facilitates the movement of substances against a gradient

• It is not needed

• It prevents substances from entering the cell

• It helps substances move passively