Rennin is an enzyme originated from the forth stomach of ruminant animals like cows and goats. Its substrate is the milk protein, Casein. It can also be produced by some microorganisms by genetic engineering techniques. In milk, it denaturates the casein and clot it in a process called milk coagulation.
Researchers at the Lab conducted an experiment to test the activity of the Rennin enzyme. They filled 4 test tubes with 10 ml. of row milk each. They marked the tubes with numbers 1, 2, 3, 4 respectively. They add to tubes 1 and 2 each 1.5 ml of a 1% rennin solution and to tubes 3 and 4 they add nothing.
They placed tubes 1 and 3 in a water bath at 10° C temperature, and tubes 2 and 4 in a water bath at 37° C temperature. They checked whether milk coagulation has occurred in the tubes after 20 minutes.
Based on what you've learned about enzymes and the attached movie, which of the following sentences describes the expected experiment results?
3 People tried to answer this question
Very good! You have understand the experiment correctly.
Read again the experiment details. Try to make a sckech. It will help you organize the information.
Try to recall temperature affcet on enzyme activity.
The question is related to the procees of milk coagulation which prepared by adding Renin solution to the milk and the temperature affect on enzyme activity.
I like your movie (as I write in the previous comment ) , but I could not find a relevant knowledge about the temperature affect on the enzyme activity in attached movie.
The question included most of the criteria for a multi-choice question: background, video, feedback for every disturbance, and the question ends with a question mark. However I found some spelling mistakes in the feedback distractors-for example : You write sckech instead of sketch , or affcet intead of affect.
Hints given for wrong answers :
Hints given after the student answers incorrectly encourages the student to continue trying to solve the problem again, which leads to the solution.
In the form of this behavior we support increased internal motivation, which support SDT theory.