DC Biology Chapter 1, 2, and 3 Test Review

Front

What is the structure that contains nucleic acids in eukaryotic cells?

Back

The nucleus.

Front

What is the correct order of biological organization from smallest to largest?

Back

Cells -> Tissues -> Organs -> Organism -> Population -> Community -> Ecosystem.

Front

How many protons and neutrons are in a carbon atom?

Back

6 protons and 6 neutrons.

Front

What is the optimal pH for gastric enzymes?

Back

Gastric enzymes perform optimally at a lower pH (acidic conditions).

Front

What does a pH of 4 indicate about a substance?

Back

It is more acidic than a substance with a pH of 6.

Front

What is the definition of an acid?

Back

A substance that donates protons (H+) in a solution.

Front

What is the definition of a base?

Back

A substance that accepts protons (H+) in a solution.

Front

What is the pH scale range?

Back

0 to 14.

Front

What is the relationship between pH and hydrogen ion concentration?

Back

As pH decreases, hydrogen ion concentration increases.

Front

What is a community in ecological terms?

Back

A group of different species living together in a specific area.