ENZYMES activity - Free Printable

Let’s go step by step through each question on the worksheet.

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1. Enzymes S________ up the rate of chemical ________.

Enzymes speed up reactions. So:
- First blank: Speed
- Second blank: reactions

→ “Enzymes Speed up the rate of chemical reactions.”

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2. Enzymes are S________ because they only work on one substrate.

This is talking about how enzymes are picky — they only fit one specific thing (substrate). That word is Specific.

→ “Enzymes are Specific because they only work on one substrate.”

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3. The substrate fits into the A________ site on the surface of the ________.

The place where the substrate binds is called the Active Site, and it’s on the Enzyme.

→ “The substrate fits into the Active site on the surface of the Enzyme.”

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4. Enzymes can be re-used, so only S________ amounts are needed.

Since enzymes aren’t used up, you don’t need a lot — just small amounts. Word starts with S → Small

→ “Enzymes can be re-used, so only Small amounts are needed.”

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5. To which group of biochemical do enzymes belong? _ P________

Enzymes are made of protein. So answer is Proteins

→ “To which group of biochemical do enzymes belong? Proteins”

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6. Enzymes are proteins so they are made up of long chains of A________ A________.

Proteins are made of amino acids. Two words starting with A → Amino Acids

→ “Enzymes are proteins so they are made up of long chains of Amino Acids.”

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7. The shape of an enzyme is very important to its F________.

If the shape changes, the enzyme doesn’t work right. Shape affects function → Function

→ “The shape of an enzyme is very important to its Function.”

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8. Label the image below with the following terms: ACTIVE SITE, REACTANT, ENZYME

Looking at the diagram:

- Green shape with a notch = Enzyme (it’s the big molecule that does the work)
- The notch in the green shape = Active Site (where the reactant fits)
- Yellow shape that fits into the notch = Reactant (also called substrate)

So label them as:
- Arrow pointing to green shape → ENZYME
- Arrow pointing to the notch in green → ACTIVE SITE
- Arrow pointing to yellow shape → REACTANT

*(Note: In biology, “reactant” here is often called “substrate”, but the worksheet says to use “reactant”)*

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9. Match the following. Each answer will only be used once.

We’ll match each term on the left to the correct definition on the right.

Left side:
- active site
- anabolism
- catabolism
- catalyst
- coenzyme
- nonsubstrate
- product
- protein
- substrate

Right side definitions:

1. a portion of an enzyme to which a substrate can attach → active site
2. the chemical on which the enzyme acts → substrate
3. the result of a chemical reaction → product
4. a molecule that prevents an enzyme from working → nonsubstrate? Wait — actually, this is usually called an inhibitor. But since “nonsubstrate” is listed, and it’s not a real standard term, maybe it’s meant for #4? Let’s check others first.
5. a molecule that makes the active site of an enzyme functional → coenzyme (like vitamins helping enzymes)
6. the break-down of complex molecules into simple molecules → catabolism
7. a reaction making simple molecules into complex molecules → anabolism
8. a molecule that speeds up chemical reactions → catalyst (enzymes are biological catalysts)
9. all enzymes fit into this class of macromolecules → protein

Now let’s assign:

- active site → 1
- anabolism → 7
- catabolism → 6
- catalyst → 8
- coenzyme → 5
- nonsubstrate → 4 (even though it’s not perfect, it’s the only one left that could mean “not the right substrate” or something that blocks)
- product → 3
- protein → 9
- substrate → 2

Wait — “nonsubstrate” isn’t a standard term. Maybe it’s a trick? But since we have to use all, and #4 says “prevents enzyme from working”, perhaps “nonsubstrate” is meant to be a wrong molecule that binds and blocks? We’ll go with that.

Final matching:

- active site → 1
- anabolism → 7
- catabolism → 6
- catalyst → 8
- coenzyme → 5
- nonsubstrate → 4
- product → 3
- protein → 9
- substrate → 2

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✔ All questions solved!

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Final Answer:

1. Speed, reactions
2. Specific
3. Active, Enzyme
4. Small
5. Proteins
6. Amino, Acids
7. Function
8.
- Green shape → ENZYME
- Notch in green → ACTIVE SITE
- Yellow shape → REACTANT
9.
- active site → 1
- anabolism → 7
- catabolism → 6
- catalyst → 8
- coenzyme → 5
- nonsubstrate → 4
- product → 3
- protein → 9
- substrate → 2