For each of the following, select whether you would expect the most likely outcome of an iodine test to be positive (starch is present) or negative (starch is absent):

Question

Spinach:
positive

Bacon:
negative

Mushrooms:
negative

Answer 1

Your expectations for the iodine test outcomes based on the presence of starch are correct:

• Spinach: Positive (starch is present)
• Bacon: Negative (starch is absent)
• Mushrooms: Negative (starch is absent)

Starch is typically found in plant materials, like spinach, while bacon and mushrooms do not contain significant amounts of starch.