These are handouts that can be given to students as homework.
Digestion and Absorption scroll down to see diagrams An Analogy Suppose you are interested in purchasing a Pizza store and wish to investigate how productive the store is without the present owner knowing because, you fear the owner will raise the price.
So, instead of going into the store and watching what happens and asking to examine the books that record expenses and profits, you decide to watch the store from outside.
You observe how often trucks arrive with pizza dough, pizza toppings cheese, pepporoni, etc. You also observe how often workers leave the store to deliver pizzas to customers.
In this analogy, the pizza supplies are the reactants and the boxed pizzas that are delivered to customers are the end products.
The workers within the store that shape the dough, add the toppings and place the pizzas in ovens and finally in boxes are the equivalent of the enzymes. The Assignment Although you will perform the laboratory exercise working as groups of two or three students, make your report an individual effort.
For each table, record your observations at the time that you conduct the experiment. However, leave the explanations of the results until the end. Your explanations should tell why what happened did happen, or tell the value of the information observed. If, for example, there was more enzymatic activity in one tube than in another, what was responsible for the difference?
What does that observation allow us to learn about enzymes? Some of the observations that you make are of controls. For these, your explanation might tell what you would not know if the control had not been included.
For example, you test solutions labeled maltose and starch with Benedict's solution to learn if sugar is present. You are testing sugar and starch to learn if sugar is present. We expect to find a positive reaction with maltose, indicating that sugar is present.
Similarly, we expect to find a negative reaction with starch, indicating that sugar is absent. But consider the possibilities. Perhaps the solution was labeled incorrectly and that only distilled water was actually in the bottle labeled maltose Perhaps both solutions were labeled incorrectly and that the bottle labeled maltose contained starch, while the bottle labeled starch contained maltose Perhaps the reagent labeled Benedict's solution was made incorrectly and did not work to detect sugar Perhaps glassware was not cleaned well and was contaminated with sugar.
Thus, the simple control shows that the bottle labeled maltose did contain sugar and also that the Benedict's reagent did react as expected when maltose was present.
As indicated in Table 4, be sure to consider as part of your explanation the pH of the environment in which pepsin and trypsin normally work within the human digestive tract.
Although this definition is intended to assist the scientist by allowing one to express very small quantities without the use of cumbersome fractions e. The more hydrogen ions there are, the smaller the pH number. A change of each whole number represents a tenfold increase or decrease.D.
Placing 5 grams of sugar in 10 pots, and no sugar in the other 10 pots; then giving the 10 pots with sugar 40 mL of water daily and the 10 pots without sugar 80 mL of water daily C There was a growth curve for Paramecium grown in a L flask containing pond water at 20 degrees C.
Hint: The production of glucose to be converted to ethanol in biofuel production requires the reactions to occur at high temperatures and low pH.
I would look for an organism that naturally lives at a high temperature and low pH, such as a composting bacterium or a hot spring bacterium. The original purpose of this experiment was to determine the growth rates of three types of bacteria at four incubation temperatures. The results of the experiment were that at 42∞ C.
Staph Aureus grew the most overall colonies at colonies; E. coli had only colonies; and Group B . Yeast Respiration Teacher Information Summary experiment to determine the effect of temperature on respiration.
In Part 2, an open-ended inquiry, students design, conduct, and report on a controlled experiment to determine how changing the type of food affects yeast respiration.
3 packet of table sugar and 1 packet of honey 3 small. Student handout for an experiment to investigate how the solubility of sugar in water depends on temperature. The handout includes a plan, spaces for results and conclusions, and some post-experiment questions. An Investigation into the activity of A Amylase.
The following experiment is designed to investigate the effect of different environmental temperatures and pH on the activity rate of Barley amylase. the activity of the enzyme Î±-amylase under the effect of increasing environmental temperatures and increasing pH levels and to determine.