🧬 Part 1: Matching Terms to Definitions

Instructions: Match each vocabulary term with its correct definition by writing the letter in the circle.

1.

Atom

2.

Enzyme

3.

Protein

4.

Carbohydrate

5.

Lipid

6.

Nucleic acid

7.

Catalyst

8.

pH

A. A substance that speeds up chemical reactions

B. Large molecules made of amino acids

C. The smallest unit of matter

D. Molecules that store genetic information (DNA/RNA)

E. A measure of how acidic or basic a solution is

F. Fats, oils, and waxes used for energy storage

G. Sugars and starches used for quick energy

H. A protein that speeds up biological reactions

📝 Part 2: Fill in the Blanks

Instructions: Complete each sentence using the vocabulary words from the word bank below.

Word Bank: molecule, reaction, enzyme, pH, catalyst, protein

1. A _____________ is formed when two or more atoms bond together.

2. An _____________ is a special type of _____________ that helps speed up chemical reactions in living things.

3. The _____________ scale ranges from 0 to 14, with 7 being neutral.

4. A chemical _____________ occurs when substances change into new substances.

5. Any substance that speeds up a reaction without being used up is called a _____________.

🎯 Part 3: Application & Analysis

1. Explain the difference between a carbohydrate and a lipid. Include their main functions in living organisms.

2. Why are enzymes important in biochemical reactions? Give one example of how an enzyme might help in your body.

3. Circle all the macromolecules (large biological molecules) from the list below:

Atom

Protein

Carbohydrate

pH

Lipid

Nucleic acid

Hint: Think about which terms represent large, complex molecules made up of many smaller parts!

Biochemistry Vocabulary Worksheet

Biochemistry Vocabulary Worksheet

🧬 Part 1: Matching Terms to Definitions

📝 Part 2: Fill in the Blanks

🎯 Part 3: Application & Analysis

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