Biology Review Chapter 4: Cells: The Basic Units of Life

The basic unit of life is a/an ___

• atom

• molecule

• cell

The energy of carbohydrates is stored as ___

• DNA

• RNA

• ATP

Hydrophobic molecules that can store energy for long periods of time are __.

• lipids

• proteins

• nucleic acids

Cells maintain a balance of internal conditions called ___

• homeostasis

• hormones

• semi-permeable

Inside a eukaryotic cell, you would find:

• organelles

• a nucleus

• both A and B

Blood and skin are examples of:

• A. donors

• B. organs

• C. tissues

In an organ system, organs act like, “every organ for yourself!”

• True

• False

Using a microscope, scientists discovered cells are all exactly the same.

• True

• False

Prokaryotic cells use binary fission to reproduce.

• True

• False

Molecules like to diffuse or move from a clumped together position and spread out.

• True

• False