Question

1. why are enzymes labeled as a catalyst? your answer cannot use the word efficient. because they speed up the reaction, lower activation energy, not consumed or permently altered during the reaction. label the substrate, active site, enzyme, enzyme - substrate complex, and products. label the reaction

diagram with labels: substrate entering active site of enzyme, enzyme changes shape slightly as substrate binds, enzyme/substrate complex, products leaving active site of enzyme, and enzyme (circular shape) with active site, substrate (shapes), etc.

Explanation:

For the labeling part (substrate entering, enzyme/substrate complex, products leaving):

• Substrate entering active site of enzyme: The two small shapes (substrates) moving towards the enzyme's active site.
• Enzyme/substrate complex: The enzyme with the substrates bound in its active site (after the shape change, the enzyme - substrate complex is formed).
• Products leaving active site of enzyme: The two new shapes (products) moving away from the enzyme's active site.

For the question "Why are enzymes labeled as a catalyst?":

Catalysts increase reaction rate. Enzymes do this by reducing activation energy (energy needed to start reaction). Also, enzymes remain unchanged (not used up, no permanent structure change) after the reaction, so they can repeat the process.

Answer:

Enzymes are catalysts because they speed up chemical reactions by lowering the activation energy, and they are not consumed or permanently altered during the reaction.