enzymes:
27. what type of macromolecule is an enzyme?
28. what do enzymes do?
29. label the image to the right.
30. how can the environment affect enzymes?
31. what is denatured?
32. be able to interpret enzyme graphs.

Question

Accepted Answer

### Question 27
# Brief Explanations:
Enzymes are proteins (a type of macromolecule). Proteins are made of amino acids and have specific three - dimensional structures that allow enzymes to act as biological catalysts.
# Answer:
Enzymes are proteins (a type of macromolecule).

### Question 28
# Brief Explanations:
Enzymes act as biological catalysts. They speed up chemical reactions in cells by lowering the activation energy required for the reaction to occur. They do not get used up in the reaction and can be reused.
# Answer:
Enzymes act as biological catalysts, speeding up chemical reactions by lowering activation energy.

### Question 29
# Brief Explanations:
Assuming the graph is an energy - vs - reaction - progress graph: The y - axis is energy, the x - axis is the progress of the reaction. The highest point of each curve is the activation energy. The upper curve (with higher activation energy) is the reaction without an enzyme, the middle curve (lower activation energy) is the reaction with an enzyme, and the starting point is the energy of the reactants, the end point is the energy of the products.
# Answer:
- Y - axis: Energy
- X - axis: Reaction Progress
- Upper curve: Reaction without enzyme (higher activation energy)
- Middle curve: Reaction with enzyme (lower activation energy)
- Starting point: Energy of reactants
- End point: Energy of products

### Question 30
# Brief Explanations:
Environmental factors like temperature and pH can affect enzymes. Extreme temperatures (too high or too low) and extreme pH (outside the optimal range) can cause enzymes to denature (change their shape, especially the active site). Changes in temperature can also affect the kinetic energy of the enzyme and substrate molecules, affecting the rate of reaction. For example, at low temperatures, the reaction rate is low as molecules move slowly; at high temperatures (beyond optimal), enzymes denature. For pH, each enzyme has an optimal pH (e.g., pepsin in the stomach works best at acidic pH, trypsin in the small intestine at alkaline pH), and deviations from this can denature the enzyme.
# Answer:
Environmental factors (temperature, pH) affect enzymes. Extreme temp/pH denature enzymes; temp also affects reaction - rate via molecular kinetic energy.

### Question 31
# Brief Explanations:
Denaturation is a process in which a protein (including enzymes) loses its specific three - dimensional structure, especially the secondary, tertiary, and quaternary structures. This is often due to changes in environmental conditions like high temperature or extreme pH. When an enzyme denatures, its active site loses its specific shape, and the enzyme loses its catalytic activity as the substrate can no longer bind effectively.
# Answer:
Denaturation is the loss of a protein (enzyme)’s specific 3D structure (including active site), often due to environmental changes, leading to loss of catalytic activity.

### Question 32
# Brief Explanations:
To interpret enzyme graphs (usually energy - reaction progress or rate - factor graphs): For energy - reaction progress graphs, compare activation energy with and without enzyme (enzyme lowers it). For rate - temperature/pH graphs, identify optimal conditions (highest rate) and ranges where rate increases/decreases (due to kinetic energy/denaturation). For rate - substrate concentration graphs, see saturation (rate levels off when all enzymes are occupied).
# Answer:
- Energy - reaction progress: Enzyme lowers activation energy.
- Rate - temp/pH: Identify optimal temp/pH (highest rate), and how rate changes (kinetic energy/denaturation).
- Rate - substrate: Rate increases then levels off (enzyme saturation).

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QUESTION IMAGE

Question

Explanation:

Question 27

Answer:

Question 28