An experiment on the effects of different variables on cellular respiration

Make sure they make a LINE graph that shows a separate line for their fish and the average. Describe how the fish's respiration rate changes with the temperature. As the temperature is decreased, the breathing rate also decreases 2. Propose an explanation for why the respiration changed in this way.

An experiment on the effects of different variables on cellular respiration

What Are the Effects of Temperature on the Respiration of Yeast? Yeast respiration increases, and therefore rises more quickly and voluminously, with an increase in temperature up until 35 degrees Celsius, at which point respiration will gradually slow. At 50 degrees Celsius, the yeast will begin to. In aerobic respiration oxygen is needed. The waste products are water, carbon dioxide and heat. The oxygen (O2) and carbon dioxide (CO2) is transported to/from the cells by the hemoglobin in the blood from/to the lungs. In this experiment, the rate of cellular respiration in the germinating peas, in both water baths, will be much higher than that of the beads and non-germinating peas. The cooler temperatures in the other water bath should cause the rate to be much slower in all three respirometers.

October 30, Cellular Respiration in Mealworms Energy is at the heart of life. Without energy, cells could not grow, transport materials, or maintain order. In most organisms, this steady source of energy is provided by ATP or adenosine triphosphate, a molecule that consists of a nucleotide with three attached phosphate groups.

Cells produce ATP through a process known as cellular respiration. In this process, free energy is transferred from food molecules such as glucose into ATP molecules as glucose is gradually oxidized, releasing energy that is eventually used to attach inorganic phosphate groups to ADP molecules to produce ATP.

Cellular respiration consists of substrate-level phosphorylation during glycolysis and Krebs cycle, which occur in the cytoplasm and mitochondrial matrix respectively, and the much more energy-rich oxidative phosphorylation during the electron transport chain, occurring in the mitochondrial inner membrane.

Despite its complexity, cellular respiration can be summarized by the following simple chemical equation: Specifically, we decided to use a carbon dioxide probe to measure the rate at which two mealworms in a closed jar produce carbon dioxide.

Since carbon dioxide is produced as a byproduct of cellular respiration, the change in carbon dioxide concentration over time can be used to measure the rate of cellular respiration of the mealworms. We also decided to study the factors affecting the rate of respiration by asking, what effect, if any, does sound have on the change in CO2 concentrations in the jar with the two mealworms?

We initially hypothesized that sound would increase the rate of respiration because higher sounds are likely to cause the mealworms to move around more, increasing the need for energy. To begin testing our hypotheses, we took two mealworms and placed them in a large jar. We sealed the jar by inserting a Vernier carbon dioxide probe into the top opening.

We then connected the probe to the Vernier Graphical app. For the control case, we then let the jar sit for ten minutes, using Vernier Graphical to measure the carbon dioxide concentration in parts per minute over the ten minute duration.

Next, for the experimental cases, we again took the jar and placed two new, but identically sized mealworms we had to air out the first two and repeated the process of measuring carbon dioxide concentration over ten minutes.

But this time, we used another app to generate a high pitch noise, above the frequency that humans can hear, for the entire ten minutes, keeping the iPad close to the jar. Finally, we repeated the same procedure with two new, identically sized mealworms but played a low pitch noise within the human audible range for the entire ten minutes.

Pictures of the experimental setup — two mealworms in a jar with carbon dioxide probe. Graph showing carbon dioxide concentration ppm vs time for all three cases. Red — low pitch. Yellow — high pitch. In this graph, the blue line is the data from the control case, the red line is the low pitch trial, and the yellow line is the high pitch trial.

From the graph, we can see that, in the control case, the carbon dioxide concentration increased from ppm to ppm, an increase of ppm.

For low pitch, the change in carbon dioxide concentration over the same interval was an increase by ppm, and finally for high pitch, the change in carbon dioxide was an increase of ppm.

The data clearly shows that the increase in carbon dioxide concentration was greatest in the high pitch case and lowest in the control case. This means that cellular respiration is occurring at a faster rate in the low pitch case and at the fastest rate in the high pitch case, since more carbon dioxide production means more moles of glucose are oxidized per unit time.

Thus the data supports our hypothesis that sound increases the rate of cellular respiration by making the mealworms move around more because of discomfort. It also makes sense that high pitch sounds increased cellular respiration more than low pitch sounds since high pitch sounds are more unpleasant than low pitch ones, leading to more motion as a result.

We also successfully determined the effect of at least one factor, sound, on the rate of cellular respiration. Some sources of error in this experiment, however, may include the fact that we used different mealworms in each trial, although we controlled for biomass by using identically sized mealworms each time.

For future research, we would definitely like to measure the impact of other factors, such as temperature or time of day, on cellular respiration using a similar method, and repeat the experiment on bigger, more complex organisms as well.

However, the biggest goal would be to actually measure the rate of cellular respiration in terms of moles of glucose oxidized per second. Finally by converting back into moles and using stoichiometry, we could get moles of glucose.

We could then use the information from the graph to determine the number of moles of glucose oxidized in the ten minutes to finally obtain a quantitative rate of respiration.Cellular respiration and fermentation are 2 of the most challenging concepts for introductory biology students, who may become so consumed by memorizing steps of the Krebs cycle and glycolysis that they lose sight of the big picture.

means of studying the effects of different variables on yeast fermentation. In this week's lab you will study the rate of cellular respiration by yeast cells in the presence of a 5% (w/v) glucose solution. The results of your experiment will show the effect of some factor over a range of conditions (e.g., temperatures) on the rate of.

During cellular respiration, two gases are changing in volume. Each set will be incubated at a different temperature. One respirometer will contain germinating seeds, one will contain a mix of nongerminating seeds and plastic beads with a volume equal to the first vial.

Write a summary for this experiment where you make a CLAIM that.

An experiment on the effects of different variables on cellular respiration

Mar 10,  · Best Answer: In all three experiments, you are looking at the effect of germinating or dry seed and temperature on the rate of cellular respiration. Your control is the investigated factor that doesn`t change, and your variable is the factor you are altering in that particular Resolved.

Nov 21,  · AP Bio Cell Respiration Experimental Design. Your Mission: To design an experiment to identify the effect of temperature on aerobic cell respiration.

Your Apparatus: The respirometer When an living thing carries on aerobic respiration, oxygen is removed from the atmosphere and an equal volume of carbon dioxide is produced and released into the atmosphere.

of our experiment was to investigate the effect of three different temperatures (31°C, 35°C, and 39°C) on the volume of CO dependant variable was the amount of CO 2 Under the aerobic conditions of this experiment, cellular respiration is the main reaction responsible for .

Exploring Cellular Respiration by Measuring CO2 Production