Understanding Chemical Reactions in Biology

What role do organic molecules play in the body?

• They are broken down for energy or used as building blocks.

• They are only used to form proteins.

• They are not involved in any chemical changes.

• They are only used for energy storage.

Which of the following is an example of a chemical change involving amino acids?

• Amino acids breaking down into glucose.

• Amino acids forming complex proteins.

• Amino acids turning into simple sugars.

• Amino acids dissolving in water.

In a chemical reaction, what does the arrow represent?

• The start of the reaction.

• The end of the reaction.

• The point where bonds are broken or formed.

• The direction of energy flow.

What are digestion reactions?

• Reactions that form new chemical bonds.

• Reactions that break down biomolecules.

• Reactions that do not involve any chemical changes.

• Reactions that only occur in plants.

How do plants contribute to the cycle of life in terms of chemical reactions?

• They break down organic molecules and release them into the soil.

• They do not play any role in the cycle of life.

• They only release oxygen into the atmosphere.

• They take up atoms from the soil and use them as reactants.