Author: Anonymous

Why is oxygen necessary for aerobic respiration?

The graph above is based on the data from an experiment that examined the effect of pH on the activity of the enzyme catalase from two plant species (A and B). A. Using the information provided in the graph identify the optimal pH of catalase for Species B. B. Explain the reason behind the effect of pH on enzymatic activity.

Which of the following processes occur in the mitochondria? SELECT ALL THAT APPLY

Examine the figure below A. Which label represents the enzyme’s active site? B. What happens to the enzyme after the reaction is complete? 

In controlled experiments _____.

Decide whether the following statement is true or false AND provide a justification for your decision: Lactic acid fermentation is a type of anaerobic respiration carried out in muscle cells.

For her senior seminar project, Andrea recruited 2 friends and carried out an experiment to determine if fiber content can affect weight loss. For 3 months, one of her friends ate a high fiber breakfast while the other one ate a low fiber breakfast. After 3 months, the percentage of weight loss was calculated. Andrea’s data is shown in the table below: Diet High fiber diet Low fiber diet Percent weight lost 4.2% 0.76% Given Andrea’s experimental set-up, is it safe to conclude that eating a high fiber breakfast leads to weight loss? Explain.

The data below displays the results of an experiment in which potatoes were incubated in sucrose solutions of different concentrations and weighed before and after the incubation.   Sample A B C D E Sucrose Concentration 0% 0.3 M 0.5 M 0.75 M 1 M Initial weight (grams) 0.9g 1.2g 1.0g 0.95g 1.0g Final weight (grams) 1.2g 1.4g 1.0g 0.8g 0.75g Percent weight change 33.3% 16.7% 0% -15.7% -25% A. Based on the results of the experiment, which of the sucrose solutions listed above (in blue) are hypotonic relative to the solute concentration inside the potato strips? B. Provide a brief explanation of your answer to part A.

Examine the table below which shows the experimental setup for an experiment testing the rate of diffusion of a gas molecule (blue) from one edge of a chamber to the other as shown in the figure below. Treatment No. Temperature 1 10 oC 2 25 oC 3 37 oC 4 55 oC A. For which of the experimental conditions shown in the table above do you expect to see the lowest rate of diffusion? B. Provide an explanation for your answer for Part A. 

Which of the following processes occur in the cytosol/cytoplasm? SELECT ALL THAT APPLY