You are curious to know whether the amount of sugar (food) provided to yeast impacts how much waste gas is produced. To help answer this question, you set up an experiment similar to the one you performed in lab. However, this time, you use four flasks instead of two.    In Flask 1 you add 1/4 teaspoon of sugar, in Flask 2 you add 1/2 teaspoon of sugar, in Flask 3 you add 1 teaspoon of sugar, and in Flask 4 you add no sugar.   You add 1/2 teaspoon of yeast ("unlabeled sample") and 20 mL of lukewarm water to each flask.   You place a balloon on top of each flask. After 30 minutes, you measure the circumference of each balloon to determine how much gas was produced   efer back to this experiment to answer questions 1-7.   ________________   A) What were the treatment groups in this experiment? B) Which group was the control group?

How much water, yeast, glucose, and  flour is used in the experiment

As a clinical microbiologist, your job is to identify an infectious bacterial strain isolated from a patient. Phenotypically, you have discovered that the new bacterial strain can grow in the presence or absence of oxygen. By growing the strain in glucose carbohydrate tubes, you found that the organism is positive for glucose fermentation. After genome sequencing and biochemical analysis, you know that your organism is capable of making all of the enzymes necessary for glycolysis, and that it contains a TCA cycle and an electron transport chain.

6. A valid question for Jim's next experiment would be? a) is strawberry production different in lime treated vs. normal (unacidic) soil? b) Does Jim really like strawberries? c) Are strawberries always red? d) Will strawberries be available in the market? 7. Your tire blew out on the way coming to this exam. What would your hypothesis for the cause of the blowout be? a) A nail pricked into the tire b) The weather was bad c) Your dog chewed on the tire d) Tires are made to blow out 8. A scientist testing the affects of a chemical on apple yield sprays an orchard with the chemical. A second orchard does not receive the chemical. In the fall, the number of apples harvested from each forest is counted. Which of the following is the independent (manipulated) variable in the experiment? a) chemical b) Number of apples c) First orchard d) Second orchard 9. Sitting in class sweating profusely, you notice that the door seems to be closed every time you perspire in class. This is most closely…

What would you expect to see if the yeast cell metabolism slowed down? How could this be done?

We will perform a gram stain on our samples, so be sure to bring your instructions on gram staining. Will this procedure stain all cells? A. Yes, all prokaryotic and eukaryotic cells will be stained purple or pink. B. All prokaryotic cells will be stained. Eukaryotic cells will not be stained. C.Mycobacteria and a few other groups with special cell wall structures will not be stained. All other prokaryotic cells will be stained. Eukaryotic cells will be stained pink. D. Mycobacteria and a few other groups with special cell wall structures will not be stained. All other prokaryotic cells will be stained. Eukaryotic cells will be stained purple.

In the experiments below, different prokaryotic cells were grown in broth cultures in the presence or absence of an antibiotic (either vancomycin or polymixin) After 1 hour, cells were rinsed, and the percent of bacteria that survived was determined. According to the data, which experiment (A or B) was done with vancomycin and which was done with polymyxin? Explain your reasoning in both cases. 100 0 A Bacillus E. coli with antibiotic without antibiotic B Methanoge n 100 Bacillus E. coli Methanogen

Which one is the mobile electron carrier in the PSII?   Question 7 options:   PC   PGA    PQH2    None of the above

To what extent do nutrients from terrestrialecosystems affect organisms in the lake?

A glucose monitor is an instrument that diabetics use to check their blood sugar. To use it, you insert a 'test strip' into the monitor and apply blood to it, then the blood is sucked into the instrument and the concentration of the sugars in the blood are measured. Like most instruments, it isn't 100% accurate 100% of the time. The informational pamphlet includued with the test strips say that a sample with a concentration of 7.2 mg/ml will give a reading with a standard deviation of 0.2 mg/ml. This means that when measured, a sample of blood with a 7.2 mg/ml glucose concentration will give a reading between mg/ml % of the time. mg/ml and