Unit 1: Chemistry of Life

Front

What is the strongest acid among the following options?

Back

Hydrochloric acid (pH 1.0) is the strongest acid.

Front

What effect does an enzyme have on a biochemical reaction?

Back

An enzyme decreases the energy needed to move from Point 1 to Point 2 in a biochemical reaction.

Front

Why do most enzymes not increase the rate of reactions at very high temperatures?

Back

The enzyme denatures and can no longer function properly at very high temperatures.

Front

What are lipids composed of?

Back

Lipids are composed of three fatty acid chains bonded to a glycerol.

Front

Why can water striders walk on water?

Back

Water striders can walk on water because they are light enough not to break the hydrogen bonds holding the water molecules together.

Front

Define enzyme denaturation.

Back

Enzyme denaturation is the process where an enzyme loses its functional shape due to external stress, such as high temperature.

Front

What is the role of enzymes in biochemical reactions?

Back

Enzymes act as catalysts to speed up biochemical reactions by lowering the activation energy required.

Front

What are macromolecules?

Back

Macromolecules are large, complex molecules, such as proteins, lipids, nucleic acids, and carbohydrates, that are essential for life.

Front

What is the pH scale?

Back

The pH scale measures the acidity or alkalinity of a solution, ranging from 0 (strongly acidic) to 14 (strongly basic), with 7 being neutral.

Front

What are the four main types of macromolecules?

Back

The four main types of macromolecules are carbohydrates, lipids, proteins, and nucleic acids.