The Cell and Cell Transport

What does the cell membrane do?

• Stores water

• Allows materials to enter and leave the cell

• Breaks down macromolecules

• Makes and stores proteins and carbohydrates

The part of the cell where proteins are made is the .....

• Chloroplast

• Nucleus

• Ribosome

• Mitochondria

Which organelle in plants produces oxygen and releases it as waste?

• Cell wall

• Chloroplast

• Mitochondria

• Ribosome

Which type of cell is very simple, with no nucleus or organelles. Bacteria is an example.

• Autotrophic

• Eukaryotic

• Heterotrophic

• Prokaryotic

What is Osmosis?

• The active transport of water across a selectively permeable membrane.

• The transport of any molecule across a membrane.

• The facilitated diffusion of water across a selectively permeable membrane

• The spreading out of molecules through the air.

What type of solution is it when the cell contains a higher percentage of water than the solution it is placed in?

• Neutronic

• Hypertonic

• Hypotonic

• isotonic

How is active transport different from passive transport?

• Active transport requires energy, passive transport does not.

• Passive transport requires energy, active transport does not.

• Active transport does not occur in cells.

• Passive transport does not occur in cells.

In a hypertonic solution, in which direction will water move?

• Into the cell

• Out of the cell

• Into and out of the cell at the same rate

• The water will not move at all

What would happen to the cells of a freshwater fish if it were placed in salt water?

• Water would leave the cells and they would shrink.

• Water would enter the cells and they would swell, maybe burst!

• Water would enter and leave the cells at the same time

• Nothing

When molecules diffuse, they...

• Move from an area of high concentration to low concentration.

• Move from an area of low concentration to high concentration.

• Move from one area of equilibrium to another

• Move from being spread out to accumulate in a specific area