IB Biology SL Midterm A

Front

What reaction occurs when a dipeptide is formed from amino acids?

Back

Condensation

Front

What is the hydrophobic region of the cell membrane composed of?

Back

Phospholipid bilayer with hydrophobic fatty acid tails.

Front

What is the optimum pH of the enzyme if its activity is greatest around pH 6.6?

Back

6.6

Front

What is a phospholipid composed of?

Back

A phosphate and glycerol head and 2 fatty acid chain tails.

Front

What is the mRNA sequence that matches the DNA strand GTACAT?

Back

CAUGUA

Front

Define hydrolysis in the context of proteins.

Back

Hydrolysis is the chemical process that breaks down proteins into amino acids by adding water.

Front

What is the role of enzymes in biological reactions?

Back

Enzymes act as catalysts to speed up chemical reactions without being consumed.

Front

What is the structure of a cell membrane?

Back

The cell membrane is a phospholipid bilayer with embedded proteins, cholesterol, and carbohydrates.

Front

What is denaturation in proteins?

Back

Denaturation is the process where proteins lose their structure and function due to external stress, such as heat or pH changes.

Front

What is the function of cholesterol in the cell membrane?

Back

Cholesterol helps to stabilize the fluidity of the cell membrane.