In a biochemistry lab, students conducted an experiment to compare the enzyme activity in spinach and lettuce leaves. They first observed the color change in both leaves when exposed to air due to phenolase activity. Then, they performed another experiment where they added hydrogen peroxide (H₂O₂) to fresh spinach and lettuce samples and recorded the time until bubbles appeared. Which sample has more catalase? Explain your answer.

• A. Spinach because it produced bubbles faster than lettuce.
• B. Lettuce because it produced bubbles slower than spinach.
• C. Both have equal amounts of catalase, as both showed similar bubble formation rates.
• D. It cannot be determined without additional information.

Answer: (A)