investigating the effect of temperature on the rate of photosynthesis experiment

Difference between means = 4.746153846, 3. This is the rate of photosynthesis at that particular temperature. Set up experiment as shown in the diagram, and hold the scale and syringe using a stand and clamp. <> Users may need to adapt the risk assessment information to local circumstances. Core practical 10: Investigate the effects of different wavelengths of light on the rate of photosynthesis The photosynthetic rate is usually measured indirectly by detecting the amount of carbon dioxide released by plants. Investigating the rate of photosynthesis.

<>/ExtGState<>/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 612 792] /Contents 4 0 R/Group<>/Tabs/S/StructParents 0>> Aim: The aim of this experiment is to evaluate the effect of varying the temperature on the rate of photosynthesis. At some point, a temperature is reached that is an optimum temperature. Do you think the light intensity, type of plant, or the temperature matter?

We will add sodium bicarbonate to increase the amount of carbon dioxide the elodea is exposed to, therefore will increase the rate of photosynthesis. This is because during the 5 minutes the elodea was left, the temperature often drifted from what was needed. Don’t waste Your Time Searching For a Sample, Get Your Job Done By a Professional Skilled Writer. But at high light intensities one or more other factors must be limiting, such as temperature or carbon dioxide supply.

It is the process by which many cells, produce energy using nutrients and... A plant needs to use photosynthesis to survive just like we need to use reparation to survive. The enzyme works as its active site, which is a specific part of the enzyme that reacts, binds to a substrate molecule.

11. This may not have been enough time for the experiment to be accurate. The most significant limitation is that we cannot fully associate the rate of photosynthesis with the amount of oxygen released by the elodea. Graph 1 rapidly decreases from 44oC to 75oC where the average rate of oxygen decreases from 35.2mm3/min to 0mm3/min. To increase the temperature until wanted temperature is gained. The syringe pulls the bubbles through fast; therefore we need to pull very slowly to align the bubbles correctly with the graph paper beneath. A globe.

Students looking for free, top-notch essay and term paper samples on various topics. 3. Fill less that half the beaker with water, at room temperature. This also stops gas exchange which slows photosynthesis even further. The rate of photosynthesis in relation to temperature forms At 0oC the enzyme has little kinetic energy, and as the dark stage of photosynthesis is controlled by enzymes; RUBISCO catalyses the combination of carbon dioxide and RuBp, this will be done slower than at a higher temperature. Every experiment is carried in the same environment. As this is a factor that affects the rate of photosynthesis, this could cause inaccuracies in my results if the light intensity is varied through my experiment. This is not a very accurate way to keep the temperature level. First These series of reactions occur in the stroma. reaction. After calculating, percentage Essay, 5 pages. During this process enough energy is released to synthesise ATP from ADP and an inorganic phosphate group. If it is At the experiment of 0oC, set up apparatus as before, only using a beaker instead of a water tub.

the problem and selecting the variables. He is an expert in solid-state physics, and during the day is a researcher at a Russell Group U.K. university. This was not very accurate; therefore all experiments should be carried out in a water bath, which will electronically keep the temperature constant. Standard deviation of the volume of oxygen released at 35oC squared, divided by number of pieces of data = (11.36500358)2 = 9.935638952, 4.

Copying content is not allowed on this website, Ask a professional writer to help you with your text, Give us your email and we'll send you the essay you need, Please indicate where to send you the sample. Photosynthesis is one of the most remarkable biochemical processes found on Earth and allows plants to use sunlight to make food from water and carbon dioxide.

This is the rate of photosynthesis at that particular concentration of CO2. Measure with a ruler the distance the lamp is away from the elodea. The elodea is cut at a slant, as less air bubbles will be trapped.

Also after the clock was stopped, different times were taken to pull the bubbles through, therefore allowing photosynthesis to occur a few moments longer.

This will be because a longer elodea may mean more leaves, which provides a larger surface area in total, allowing more light to be absorbed, therefore increasing the rate of photosynthesis. This essay will explain the role of carbon dioxide in various parts of the carbon cycle. The temperature of the water could be inaccurate; where the water was not monitored electronically the temperature could fluctuate. 1) the variables of light intensity, temperature, carbon dioxide, light quality all influence the rate of photosynthesis. 8. As the amount of water increases, its ability to warm up the

This is because light intensity affects the rate of photosynthesis, therefore needs to be kept equal throughout. Abstract This experiment was conducted in order to see if the temperature of an environment has an effect on the rate at which the plants in that environment perform photosynthesis. This was the rate of oxygen released at 25oC, the average rate of oxygen released for this temperature was 6mm3/min. Also as it is thin, it is hard to measure with the human eye exactly the temperature desired, which can cause inaccuracies. is higher than the expected value measure 100ml of water with a graduated This is because enzymes control the dark stage of photosynthesis. This leads to a decrease in glucose production and will result in stunted growth. This is a relatively small difference, although not as minor as for 0 degrees, it is still accurate. The ATP then passes to the light-independent reactions. We used thermometers to measure temperature, as it is relatively accurate, to the nearest degree. When GP cannot be made the Calvin cycle cannot be completed, therefore the dark stage of photosynthesis cannot occur, releasing less and less oxygen. This enzyme is needed in the dark stage of photosynthesis to catalyse the conversion of ribulose bisphosphate and carbon dioxide into gycerate 3-phosphate in the Calvin cycle. Mean volume of oxygen released at 35oC = 34.27307692. At high concentrations, the rate of photosynthesis begins to level out due to factors not related to carbon dioxide concentration. heat it up and some water leaves the kettle as a gas. Adding ice and warm water is not an accurate way to keep the temperature constant. We use cookies to give you the best experience possible.


bath in the water bath should be kepth constant for each temperature sample. Your Answer is very helpful for Us Thank you a lot!

The rate of photosynthesis in relation to temperature forms a bell curve. Therefore instead of counting bubbles we will pull through all oxygen bubbles after the time is finished. This is an lab report example about the process of osmosis, written for Biology course. To contain the test tube, and water of different temperatures. The temperatures, which are measured by using thermometer, of water Therefore in our actual experiment we will leave it to acclimatise for 5 minutes. 16. Place a pond weed Elodea upside in a test tube containing water at 25°C.

this experiment, the amount of oxygen is going to be considered to decide on This is necessary as it can cause inaccurate results due to different number of leaves the different elodea contain.

P680 receives replacement electrons from the splitting of water. of the plant, from which the leaf that is going to be used for the Optimum photosynthetic rates lead to the removal of greater amounts of carbon dioxide from the local atmosphere, producing greater amounts of glucose.

We will get a water tub and fill it with water from the tap.

These days we pollute mother earth very badly and slowly on the globe, there will not be any green left! The thermal energy breaks the hydrogen bonds holding the secondary and tertiary structure of the enzyme together, so the enzyme (and especially the active site) loses its shape to become a random coil. This is because the enzymes involved in the chemical reactions of photosynthesis are temperature sensitive and destroyed (denatured) at higher temperatures. This was not very accurate as bubbles could have been missed.

This is the t value. Before starting my investigation on how temperature affects the rate of photosynthesis I carried out some research into photosynthesis. This is because of how efficient it is for that particular temperature. However this wasn’t very accurate. This means if the temperature goes higher than needed, ice needs to be added. To increase rate of photosynthesis if not occurring. This means there will be different numbers of chlorophyll on each, therefore light absorption will vary between elodea, meaning different rates of photosynthesis and different amount of oxygen released as a result of this. In a solution that contains only extracted pigment, the absorbed energy cannot usefully be passed on to do work and electrons return to their unexcited state and the absorbed energy is transferred to the surroundings as thermal energy and as light at a longer and less energetic wavelength than that which was absorbed, this is the red fluorescence. In our preliminary experiment we measured the rate of photosynthesis by counting the amount of oxygen bubbles released. Here light energy is converted to chemical energy. The light intensity varied between 6 and 7 on the light intensity meter, even thought this is not a big difference it could still be significant enough to cause inaccuracies in the results.

A variable that is hard to control is the effect of temperature as the lights used may heat the water.

Above that temperature, the enzymes begin to denature (as in RUBP carboxylase), slowing the rate of photosynthesis until a temperature is reached where photosynthesis does not occur at all. Start with tap water, as the temperature of this would be nearest to 15oC.

I correctly predicted the rate of oxygen produced would rise, as temperatures get warmer, due to the increased kinetic energy of the enzyme rubisco. In our experiment we will measure the amount of oxygen released by pulling the oxygen bubbles released with a syringe and measure this using a scale. This is an example of a common experiment used to investigate light intensity and the rate of photosynthesis. cylinder and let it cool down in the graduated cylinder. water as 10.

The photosynthetic reaction rate is at its quickest rate at this point. We will now use the standard deviations to calculate the significance of the difference between two means.

When carbon dioxide concentration is low less GP can be produced. Another assumption is that all the bubbles are the same size. This is not enough repeats to make the results reliable.


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