Cell Quiz

• 1.  Cells are the basic units of structure and function of all living things.
• 2.  All living things are composed of cells.
• 3.  Cells come from cells.

The cell membrane is a gate keeper.  It controls what substances can enter and leave the cell.

The nucleus is the control center of the cell.

The mitochondria is the powerhouse of the cell.  It converts energy from food into energy a cell can use.

A bacterial cell does not have a nucleus.  The only organelle it has in common with a plant and animal cell is the ribosome.

Carbon

• 1.  Most chemical reactions in cells require water.
• 2.  Keeps cell's shape and size
• 3.  Maintains the cells temperature.
• 4.  Carries substances into and out of the cell

The movement of molecules from an area of higher concentration to a lower concentration.

A special type of diffusion that moves water molecules from an area of higher concentration to an area of lower concentration

selectively permeable

passive transport

active transport

Enzymes are a special type of protein that speed up chemical reactions.

A substance that cannot be broken down into simpler elements

When two or more elements that combine chemically.