In Exercise 4, you learned about a reaction that amylase catalyzes. Below, is an example of another enzyme-catalyzed reaction.    Lactase, is an enzyme found in the human body, which is responsible for breaking down lactose molecules. Lactose molecules are found in milk products. Many people are deficient in lactase, which makes them unable to effectively break down milk products. There is a specialized test that can be done to test for lactose deficiency, using blood glucose levels as the indicator. A scientist set up an experiment to test the effect of time on lactose breakdown through this enzyme-catalyzed reaction. In this experiment, the subjects consumed 1 cup of milk, and had their blood drawn every 15 minutes to test their blood glucose level. Give an example of a variable that must be held constant in this experiment. 

When changing from the 10x objective lens to the 40x objective lens, the field of view will:

TRUE or FALSE: We would expect a concentration of .25mg/ml of the enzyme amylase to result in a shorter time to reach the reaction endpoint, than a concentration of 2mg/ml. 

My high school students completed an experiment where they were asked to water an aloe plant a different amount each week, and measure the plant’s growth each Friday.  What is the dependent variable in this experiment?

A beaker is more precise than a graduated cylinder at measuring the volume of a liquid.

When changing from the 4x objective lens to the 10x objective lens, the field of view will:

Name the color-changing molecule that was used to determine the endpoint of the chemical reaction you studied in Lab Exercise 4.

Name the enzyme that catalyzed the chemical reaction you studied in Lab Exercise 4.

Which phase of water is shown below?    

Which of the following is an aminoglycoside?