Midterm Review

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concenteraion gradient

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

All of the following are functions of a cell membrane EXCEPT

• surrounding and protecting the contents of the cell.

• releasing waste products from the cell.

• producing energy for the cell processes.

• allowing gases to enter the cell.

Which characteristic of a cell membrane allows it to control materials entering and leaving a cell?

• A cell membrane is surrounded by fluid.

• A cell membrane is semi-permeable.

• A cell membrane holds organelles in place.

• A cell membrane is found in plant and animal cells.

Which type of movement requires cellular energy?

• osmosis

• active transport

• diffusion

• facilitated diffusion

What are the three types of passive transport?

• osmosis, diffusion, active transport

• active transport, facilitated diffusion, osmosis

• diffusion, osmosis, facilitated diffusion

• facilitated diffusion, active transport, diffusion

Which organelle assembles amino acids to create proteins?

• nucleus

• ribosomes

• lysosome

• chloroplast

Which organelle stores food, waste, and other materials?

• cytoplasm
• ribosomes
• vacuoles
• golgi body