Biology Chapter 3

What material makes up the cell wall in a plant cell?

• Microtubules

• Collagen

• Glycogen

• Cellulose

What are the smallest working units of living things?

• Atoms

• Cells

• Compounds

• Molecules

The cell membrane is considered selectively permeable, which means it:

• Lets anything into the cell

• Keeps everything out of the cell

• Allows certain substances to pass through

• Only allows water in the cell

Which scientist used a microscope to see the chambers in cork and named them “cells”?

• Anton van Leeuwenhoek

• Robert Hooke

• Mathias Schleiden

• Rudolf Virchow

If a material is too large to get through the cell membrane it may be able to pass through using a ____________

• vacuole

• protein channel

• helium molecule

• spaceship

The word Semipermeable means __________

• does not let any material through

• lets all material through

• only lets certain material in and out

Phospholipids have

• a total fear of water

• have hydrophobic heads and hydrophilic tails

• like water

• have hydrophobic tails and hydrophilic heads

Active transport moves materials from a ________ concentration to a _________ concentration and uses energy.

• high to low

• low to high

• high to high

• low to low

Distinguishing organelles in plant cells are

• chloroplasts, cell wall and central vacuole

• ribosomes and mitochondria

• centrioles and lysosomes

• golgi apparatus, rough ER and smooth ER

The shape of an animal cell is

• square

• rectangular

• round