Chapter 4 Review

What is the basic unit of life?

• atom

• molecule

• compound

• cell

The energy from carbohydrates is stored in _____________.

• DNA

• RNA

• ATP

• peptides

How does the body send out chemical signals?

• carbohydrates

• hormones

• polysaccharides

• proteins

What is the job of nucleic acids?

• store information in cells

• basic unit of life

• stores energy

• send messages to the brain

A solution whose solute concentration is higher than the solute concentration of another solution.

• hypertonic

• hypotonic

A solution whose solute concentration is lower than the solute concentration of another solution.

• hypertonic

• hypotonic

Molecules that can store energy for long periods of time are called ________________.

• lipids

• proteins

• carbohydrates

• nucleic acids

Osmosis is the diffusion of ____________ across a cell membrane.

• saline

• water

• energy

• coffee

Which of these are tissues?

• blood

• skin

• nerves

• muscles

The first level of organization in living things is the ________.

• cells

• tissues

• organs

• organ systems