Image result for enzyme worksheet | Biology activity, Teaching ... - Free Printable

The image provided is a diagram explaining the function of enzymes and their role in biochemical reactions. The task involves filling in the blanks to complete the explanation. Below is the solution with detailed explanations for each blank:

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Diagram Explanation and Solution

#### Top Section: General Information About Enzymes
1. "Enzymes have a specific shape. Where the substrate fits is called the a _______."
- Answer: Active site
- Explanation: Enzymes are proteins with a specific three-dimensional shape. The part of the enzyme where the substrate (the molecule that the enzyme acts upon) binds is called the active site. This is where the chemical reaction occurs.

2. "Enzymes are b _______ c _______. They are large p _______ molecules."
- Answer: Biological catalysts, proteins
- Explanation: Enzymes are biological catalysts, meaning they speed up chemical reactions without being consumed in the process. They are also large protein molecules.

3. "The l _______ and k _______ theory describes how the e _______ and s _______ fit together."
- Answer: Lock-and-key, enzyme, substrate
- Explanation: The lock-and-key model is a classic theory that explains how enzymes work. It suggests that the enzyme's active site has a specific shape that perfectly matches the substrate, like a lock fitting a key. Here, "e" refers to the enzyme, and "s" refers to the substrate.

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#### Middle Section: Enzyme-Substrate Interaction
4. "Enzyme + s _______ → Enzyme-substrate complex"
- Answer: Substrate
- Explanation: In this step, the enzyme binds to the substrate to form an enzyme-substrate complex. The "s" here represents the substrate.

5. "Enzyme-substrate complex → Enzyme (stays the same) + P _______"
- Answer: Product
- Explanation: After the enzyme catalyzes the reaction, the substrate is converted into a product. The enzyme remains unchanged and can be reused.

6. "This enzyme is d _______."
- Answer: Denatured
- Explanation: The enzyme on the left side of the diagram appears distorted, indicating that it has lost its specific shape. This is called denaturation.

7. "This could have been caused by a high t _______ or extreme pH."
- Answer: Temperature
- Explanation: Enzymes are sensitive to environmental conditions. High temperatures or extreme pH levels can cause the enzyme's structure to change, leading to denaturation.

8. "This enzyme has lost its special shape — its active site, and the substrate will no longer fit."
- Answer: Active site
- Explanation: When an enzyme is denatured, its active site loses its specific shape, preventing the substrate from binding properly.

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#### Bottom Section: Enzyme-Controlled Reactions
9. "Enzyme-controlled reactions include digestion, respiration, and photosynthesis."
- Answer: These are examples of processes in which enzymes play a crucial role.
- Explanation: Enzymes are essential for many biological processes, including:
- Digestion: Breaking down food molecules into smaller components.
- Respiration: Converting glucose into energy (ATP).
- Photosynthesis: Converting light energy into chemical energy in plants.

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Final Filled-in Diagram

Here is the completed diagram with the blanks filled in:

```
ENZYMES

Enzymes have a specific shape. Where the substrate fits is called the a _______.
Active site

Enzymes are b _______ c _______. They are large p _______ molecules.
Biological catalysts, proteins

The l _______ and k _______ theory describes how the e _______ and s _______ fit together.
Lock-and-key, enzyme, substrate

Enzyme + s _______ → Enzyme-substrate complex
Substrate

Enzyme-substrate complex → Enzyme (stays the same) + P _______
Product

This enzyme is d _______.
Denatured

This could have been caused by a high t _______ or extreme pH.
Temperature

This enzyme has lost its special shape — its active site, and the substrate will no longer fit.
Active site

Enzyme-controlled reactions include digestion, respiration, and photosynthesis.
```

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Summary

The solution fills in the blanks based on the fundamental principles of enzyme function, including their specificity, catalytic activity, and sensitivity to environmental conditions. Each term is explained in the context of enzyme action and the lock-and-key model.

Final Answer:
\boxed{
\text{Active site, Biological catalysts, proteins, Lock-and-key, enzyme, substrate, Substrate, Product, Denatured, Temperature, Active site}
}