Q1. Name the four major classes of biological molecules and give one example of each.

Background

Topic: Biological Macromolecules

This question tests your knowledge of the main categories of large molecules essential for life and your ability to provide examples of each.

Key Terms:

• Macromolecule: A large molecule composed of smaller subunits.

• Examples: Carbohydrates, lipids, proteins, nucleic acids.

Step-by-Step Guidance

1. Recall the four main classes of biological macromolecules found in all living organisms.

2. For each class, think of a specific example (e.g., a type of sugar, fat, protein, or nucleic acid).

3. Write the name of each class and its example in a list or table format.

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Q2. Distinguish between a monomer and a polymer.

Background

Topic: Macromolecular Structure

This question is about understanding the building blocks of biological macromolecules and how they are assembled.

Key Terms:

• Monomer: A small molecule that can join with others to form a polymer.

• Polymer: A large molecule made up of repeating monomer units.

Step-by-Step Guidance

1. Define what a monomer is in the context of biological molecules.

2. Define what a polymer is and how it relates to monomers.

3. Think of an example of a monomer and the polymer it forms (e.g., amino acid and protein).

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Q3. Compare condensation (dehydration) reactions and hydrolysis reactions. Which one removes a water molecule, and which one adds one?

Background

Topic: Chemical Reactions in Macromolecule Synthesis and Breakdown

This question tests your understanding of how biological polymers are built and broken down.

Key Terms and Concepts:

• Condensation (Dehydration) Reaction: A reaction that joins two molecules by removing a water molecule.

• Hydrolysis Reaction: A reaction that breaks a bond by adding a water molecule.

Step-by-Step Guidance

1. Recall what happens during a condensation (dehydration) reaction in terms of water and bond formation.

2. Recall what happens during a hydrolysis reaction in terms of water and bond breaking.

3. Identify which process removes water and which adds water.

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Q4. A chain of 10 glucose monomers is built by condensation reactions. How many water molecules are released? Explain your reasoning.

Background

Topic: Polymerization and Dehydration Synthesis

This question tests your ability to apply the concept of dehydration synthesis to calculate the number of water molecules released during polymer formation.

Key Formula:

Number of water molecules released = (Number of monomers) - 1

Step-by-Step Guidance

1. Understand that each time two monomers are joined, one water molecule is released.

2. For a chain of n monomers, determine how many bonds are formed (which is one less than the number of monomers).

3. Set up the calculation using the formula above for 10 glucose monomers.

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Q5. Explain why the digestion of food in your stomach and intestines is an example of hydrolysis.

Background

Topic: Digestion and Hydrolysis

This question tests your understanding of how macromolecules are broken down during digestion.

Key Terms:

• Hydrolysis: The process of breaking bonds in polymers by adding water.

Step-by-Step Guidance

1. Recall what happens to large food molecules during digestion.

2. Explain how water is involved in breaking the bonds between monomers.

3. Connect this process to the definition of hydrolysis.

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