What cellular organelle contains catalase and is present in all plant and animal organs? 5. What did measuring the bubble column heights in all the experimental procedures indicate?

The cellular organelle that contains catalase and is present in all plant and animal cells is the **peroxisome**. Peroxisomes are involved in various metabolic processes, including the breakdown of fatty acids and the detoxification of hydrogen peroxide, which is where catalase comes into play, as it catalyzes the decomposition of hydrogen peroxide into water and oxygen. Regarding your second question about measuring bubble column heights in experimental procedures, this typically indicates the rate of a reaction, often related to the production of gas. In experiments involving catalase (such as those using potato or liver extracts), the height of the bubble column can reflect the amount of oxygen produced as a result of the breakdown of hydrogen peroxide. Higher bubble column heights generally indicate a higher rate of reaction and, consequently, more catalase activity. This measurement can be used to compare the effectiveness of catalase under different conditions or concentrations.