Question

question / (1 point)
which statement about the catalase test is false?
bubbles indicate oxygen release
it identifies organisms capable of aerobic respiration
it uses hydrogen peroxide as a substrate
catalase converts h₂o₂ to water and co₂
question 8 (1 point)
in starch hydrolysis, iodine reacts with starch to produce what color?
black - blue
red
purple
yellow

Explanation:

• Question 7: Catalase converts \(H_2O_2\) to water (\(H_2O\)) and oxygen (\(O_2\)), not \(CO_2\). Bubbles in the catalase test are due to oxygen release. The test uses hydrogen peroxide as a substrate and can help identify organisms capable of aerobic respiration (many aerobic organisms produce catalase).
• Question 8: In starch hydrolysis, iodine reacts with starch to produce a black - blue color. This is a classic test for the presence of starch.

Answer:

• Question 7: Catalase converts \(H_2O_2\) to water and \(CO_2\)
• Question 8: Black - blue