Grade 9 Biology Midterm Review

Front

Why does ice float?

Back

As water freezes, it expands and its density decreases.

Front

What is the process by which cells convert glucose into ATP?

Back

Cellular respiration.

Front

Which of these is NOT true about enzymes?

Back

Enzymes can only be used once in a chemical reaction.

Front

How does an enzyme affect the rate of a chemical reaction?

Back

Enzymes lower the activation energy.

Front

What is the main function of ribosomes in a cell?

Back

Protein synthesis.

Front

What is the definition of density?

Back

Density is mass per unit volume.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions.

Front

What is the difference between aerobic and anaerobic respiration?

Back

Aerobic respiration requires oxygen, while anaerobic respiration does not.

Front

What is photosynthesis?

Back

Photosynthesis is the process by which plants convert light energy into chemical energy.

Front

What is the function of mitochondria?

Back

Mitochondria are the powerhouses of the cell, producing ATP through cellular respiration.