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To study the actions of the enzyme catalase on hydrogen peroxide, students performed the following experiment.  Catalase was extracted from potatoes by blending raw potatoes in a blender with cold distilled water.  The filtrate was stored on ice.  The following hydrogen peroxide solutions were made: 1 %, 5%, 10%, and 15%. Filter paper disks were soaked in the catalase filtrate and dropped into beakers containing the various solutions.  The activity of the enzyme was measured by the amount of time it took for the disks to float to the surface of the solution on the bubbles produced by the reaction.  The following data were obtained. Time it takes for disks to float in different Hydrogen Peroxide concentrations Hydrogen Peroxide Solution Average Time, in seconds, for disks to float 1% 30 sec 5% 25 sec 10% 20 sec 15% 10 sec If the potato solution was boiled for 10 minutes and cooled for 10 minutes before being tested, the average time for the disks to float to the surface of the hydrogen peroxide solution would be

Bonus: (worth up to 5 points) Please ignore that this question says it is out of 0 points. I will be manually adding the points during the grading process.   As this exam occurs right after Valentine’s Day, love is on my mind.  Tell me, what do you love about Astronomy?  Rubric:  Be very clear with your response, and fully explain your thoughts using at least 3 sentences to receive the full 5 points. General or vague responses will not be scored favorably. I am giving you the space to share your personal connection to our course material. Take advantage of this opportunity with a detailed answer! If you use AI to write your essay, you will receive a 0 on the entire exam and be reported for scholastic dishonesty, which could result in academic disciplinary actions. 

Calculate the power per square meter of an object with a peak temperature of `T`K. Input Instructions:  Round your answer to the nearest whole number using standard rounding conventions.  Use standard comma placements if necessary.  You will discuss units in the next question. For example: 1,416. Do not use any words, letters, or E, or scientific notation in your answer. Just a number. 

When looking at the night sky, stars are easily distinguishable from planets by their twinkling appearance.  This is mostly due to

For the COVID example we did in class, say that the entire US population size is 10000. Let’s change the test accuracy to 96%, i.e. P(T|D)=P(T^c|D^c)=0.96. 1200 people have the disease (12% from our example), 1152 people have the disease and test positive (96% true positive rate). What is P(D|T), that is the probability of having the disease given that you test positive using the Bayes’ rule? Use the tree diagram. 

What is the dose of the medication listed on the label below (including units)?  

A 48-year-old female patient has been admitted to the emergency department with the following blood gas results: pH 7.54 PaC02 29 mm Hg , Pa02 86 mm Hg, HC03 24 mEq/L. How would you interpret the results? 

The nurse administers oral penicillin to a client. Thirty minutes after administration, the client reports, “I itch all over. I feel like my lips are swollen.” Which is the most likely cause of the client’s symptoms?

In 3-4 sentences write about something that you studied that was not on this exam.