Introduction to Cells

What is the function of the cell wall?

• to protect and support the cell

• to perform different functions in each cell

• to prevent water from passing through it

• to prevent oxygen from entering the cell

Tags

NGSS.MS-LS1-2

Which organelle is the control center of a cell?

• mitochondrion

• ribosome

• nucleus

• chloroplast

Tags

NGSS.MS-LS1-2

A substance that cannot be broken down into simpler substances is a(n)

• particle.

• element.

• carbohydrate.

• compound.

Enzymes are important because they

• contain water.

• speed up chemical reactions.

• contain genetic material.

• help the cell maintain its shape.

Tags

NGSS.MS-PS1-2

Which term refers to the diffusion of water molecules through a selectively permeable membrane?

• osmosis

• engulfing

• active transport

• facilitated diffusion

Specialized cells are found only in

• animals.

• single-celled organisms.

• bacteria.

• multicellular organisms.

Tags

NGSS.MS-LS1-3

What does the term resolution refer to?

• how well structures close together can be distinguished

• how large an image can be

• how many lenses a microscope uses

• how much light is needed to see an image

What is the function of a cell membrane?

• to support the cell

• to perform different functions in each cell

• to control which substances enter and leave the cell

• to form a hard outer covering for the cell

Tags

NGSS.MS-LS1-2

Cells in multicellular organisms

• all look the same.

• all have the same structure.

• are often quite different from each other.

• are the same size in every part of the organism.

Tags

NGSS.MS-LS1-2

Which term refers to the movement of molecules from an area of higher concentration to an area of lower concentration?

• collision

• diffusion

• active transport

• concentration