Ch. 2 Cell Structure and Function

Which substances are macromolecules?

• sugars
• proteins
• nucleotides

Which substance is most common in cells?

• fat
• water
• amino acid

Which substance is a lipid?

• RNA
• sugar
• cholesterol

What does the cell theory state?

• that cells come from other cells
• that cells come only from animals
• that cells cannot be created or destroyed

Which function describes what a vacuole does?

• releases energy from food
• stores food, water, and wastes
• packages proteins into vesicles

Which function describes what a mitochondrion does?

• releases energy from food during a chemical reaction
• makes food using sunlight
• stores food, water, and wastes

Which object is an example of a prokaryotic cell?

• a plant cell
• a bacterium
• an animal cell

Which function diffuses water molecules?

• osmosis
• endocytosis
• passive transport

Which function moves substances from a lower concentration to a higher concentration?

• osmosis
• diffusion
• active transport

What happens as a cell gets bigger?

• It's volume decreases.
• It's surface area increases.
• It's need for nutrients decreases.