critical thinking
structure x
structure z
structure y
step 1 → step 2 → step 3
1. what is the enzyme? (x, y, or z)
2. what is substrate? (x, y, or z)
3. what is the product? (x, y, z)
4. what would happen if the enzyme changed its shape before the substrate attached?
5. what would happen if the enzyme changed its shape after the substrate attached?
6. what organic molecules makes up structure y?

Question

Accepted Answer

### 1. What is the enzyme? (x, y, or z)
# Brief Explanations:
Enzymes are biological catalysts that speed up reactions and remain unchanged after the reaction. In the diagram, Structure Y (enzyme) has an active site that binds the substrate (Structure X) and releases the product (Structure Z) without changing its own structure (Step 3 shows Y remains, Z is released). So the enzyme is Y.
# Answer:
Y

### 2. What is substrate? (x, y, or z)
# Brief Explanations:
Substrate is the molecule that binds to the enzyme's active site and is converted into product. Structure X (substrate) fits into Structure Y (enzyme) in Step 2, then is transformed into Structure Z (product) in Step 3. So the substrate is X.
# Answer:
X

### 3. What is the product? (x, y, z)
# Brief Explanations:
Product is the result of the enzyme - catalyzed reaction. After the reaction (Step 3), Structure Z is the new molecule formed from Structure X (substrate) with the help of Structure Y (enzyme). So the product is Z.
# Answer:
Z

### 4. What would happen if the enzyme changed its shape before the substrate attached?
# Brief Explanations:
Enzymes have a specific three - dimensional structure, especially the active site, which is complementary to the substrate's shape (lock - and - key or induced - fit model). If the enzyme changes its shape before the substrate attaches, the active site will no longer be complementary to the substrate's shape. As a result, the substrate will not be able to bind to the enzyme's active site, and the enzyme - catalyzed reaction will not occur (or the rate will be extremely low).
# Answer:
The substrate would not be able to bind to the enzyme's active site (due to the loss of complementary shape), so the enzyme - catalyzed reaction would not occur (or the reaction rate would be very low).

### 5. What would happen if the enzyme changed its shape after the substrate attached?
# Brief Explanations:
If the enzyme changes its shape after the substrate has attached, the active site's structure is altered. This can disrupt the catalytic process. The enzyme may not be able to convert the substrate into the product effectively, or the product may not be able to be released properly from the enzyme - substrate complex. In most cases, the reaction would not proceed to form the product as intended, or the efficiency of the reaction would be severely reduced.
# Answer:
The enzyme may not be able to convert the substrate to the product (or the product may not be released properly), and the reaction efficiency would be reduced.

### 6. What organic molecules makes up structure Y?
# Brief Explanations:
Structure Y is an enzyme. Most enzymes are proteins. Proteins are made up of amino acids, which are organic molecules. Some enzymes can also be RNA (ribozymes), but the majority of enzymes are proteins. So the organic molecules that make up Structure Y (enzyme) are usually proteins (composed of amino acids) or in some cases RNA (composed of nucleotides). But since most enzymes are proteins, the primary organic molecule is protein (amino acids).
# Answer:
Proteins (composed of amino acids) (or RNA in some cases, but mainly proteins)

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QUESTION IMAGE

Question

Explanation:

1. What is the enzyme? (x, y, or z)

Answer:

2. What is substrate? (x, y, or z)