Life Science Section 2B Quiz Practice

Match it! Select the correct answer from the pull down...Good luck!

Some bacteria surround themselves with a slimy layer called a _______ that protects the bacterium from harmful substances and prevents it from drying out.

When a certain type of molecule is more densely packed on one side of the membrane than on the other, a __________ gradient is formed.

Oxygen molecules can pass through easily. Whole ______ cannot pass through the membrane at all.

___________blood cells often need to ingest bacteria in order to destroy them.

The cell membrane is selectively ________. It allows some substances to pass through but keeps others out.

The cell membrane is made mostly of long carbon and hydrogen molecules called ______.

The Bible indicates that God created prokaryotic and eukaryotic cells during _______ Week.

The _________ are small organelles that act as the demolition crews of the cell.