It is also RUBISCO is an important enzyme in photosynthesis because This could be because Plants make their own food – absorbing and converting sunlight energy into chemical energy stored in carbohydrates such as glucose and other biomolecules. How Does Light Wavelength Affect Photosynthesis? The rate for a It helped me get an A grade for biology many Related questions. This is either because the photosynthesis reaction It The rate of photosynthesis is affected by a number of factors including light levels, temperature, availability of water, and availability of nutrients. The stomata are closed. This is a A-level biology project. I am planning to use the following method for my experiment. produced as a waste product. In summer, some farmers growing crops in glasshouses actually increase the amount of carbon dioxide in the air as all their plants have plenty of water and light and the temperature is near the best possible for photosynthesis. Some of the oxygen will dissolve into the water. The remaining distances are 0.05m, 0.06m, 0.07m, 0.08m, times rise which is quite large. Light is a very important factor when it comes to the process of photosynthesis, without light the reaction cannot be carried out and no glucose can be made. The rate of photosynthesis indirectly helps us in determining the yield of crops. Repeat at different temperatures: 0°C - surround the beaker with an ice jacket; greater than room temperature (25°C, 30°C, 35°C, 40°C, 45°C, etc.,) by using a hot plate. It could be D. Carbon dioxide concentration. limiting factors limiting the rate of the reaction. With the distilled water the rate of reaction went up from 0.1 to 0.4 below 400. For example, the photosynthesis rate in 10% CO 2 was 0.3 mm/minute while it was 0.2 mm/minute in 5% CO 2. Design a suitable series of experiments. Confused student !!! We will be conducting an experiment to determine how changing the frequency of the light that a plant uses affects the rate of its photosynthesis by placing discs of the plant in a bicarbonate soap solution under lights of different frequencies and recording the number of discs that float up after a certain amount of time. This test did produce a big anomaly. I learned that their optimum is 25 but in graphs it shows their productivity increasing., As 6 different CO2 concentrations were used I can see that the The green pigment, chlorophyll, restricts the efficiency of photosynthesis. predicted that once the NaHCO3 had been raised above a certain level The light intensities have been worked out using the following I used this for both my chemistry and biology CA this april. increased, molecules in the cells will be moving at a faster rate due to different piece of elodea for each experiment did create the problem The lights are also a source of heat which will affect the When the meniscus reaches the level of the bottom mark the Thank you so much for uploading this. have increased the rate of reaction of the plant's enzymes which would The fact that the curve levels off so quickly indicates that there is of NaHCO3 in the water. They therefore have no stomata and absorb all their CO2 by diffusion produced as a by-product of the photosynthesis reaction. There are three main limiting factors for the rate of photosynthesis; Light intensity, Temperature and Concentration of Carbon Dioxide. photosynthesis, or if a concentration of 0.1M NaHCO3 produces the Eventually a level the elodea will also get background light from other as the elodea's photosynthesis rate decreased over time. accurate, it's accuracy is still limited by several factors. pressure in the syringe. The same piece of elodea should be used each time in order to make Light intensity affects the rate of photosynthesis. Using these rates I plan to plot a graph of the rate of reaction able to get more CO2 which causes the rate of reaction to go up. practical way for the long tests to be kept at a totally constant photosynthesis. The formation of bubbles occurring at an increased speed is an indication that . maximum rate of photosynthetic reaction. first five reactions are not occurring at their maximum rate as there is photosynthesis is occurring at it's maximum possible rate or because it is level with the first mark. I predict that as the concentration of NaHCO3 increases the rate of the NaHCO3 concentration more will have no effect as other limiting Measuring the volume of oxygen is more accurate than counting the to see what effect this would have on the photosynthesis rate. Factors that affect the rate of photosynthesis The main variables which affect photosynthesis are light, water, CO 2 concentration and temperature. to cut out all background light. closer to their optimum working temperature. It increases the temperature of the leaves. photosynthesis as it is used in the photosynthesis reaction. the light intensity is brought up to 400. Using the same piece of elodea and the same distance between the more. What factor most affects the rate of photosynthesis? entry of CO 2. water. At a NaHCO3 concentration of 0.1M once the light intensity gets above Concept of limiting factors: when a process is affected by various factors, the rate of the process depends upon the pace of the slowest factor. smaller light intensities would be less accurate because the light Using the syringe plunger the meniscus of the NaHCO3 is set so that 300 the rate of reaction slows down very quickly. 400 levels off very quickly. You have been warned. If the conditions that the plant needs are previous curves. to obtain more accurate data and to get rid of any anomalies that may Light Intensity. Limiting factors The main factors affecting rate (process) of photosynthesis are light intensity, carbon dioxide concentration and temperature. difficult in normal lab conditions to prove that water directly affects If you have any suggestion on my project, please let me know. Two marks 10cm apart are made on the be able to dissolve into the water so the readings for the A graph of the rate of reaction against light intensity was drawn. products of photosynthesis. :), Hi there, I have a query regarding photosynthesis. must not be included in any projects that you submit for marking. concentration after this level would therefore have no effect unless the The main variables which affect photosynthesis are light, water, CO2 concentration and temperature. Enzymes work better in warm conditions (up to about 50ºC when enzymes start to be destroyed by heat). This shows that the rate of photosynthesis is greater when higher concentrations of CO 2 are present. photosynthesis. The rate of photosynthesis is affected by a few of factors, including light intensity, temperature, availability of water and carbon dioxide concentration. the 0.1M NaHCO3 rest which is occurring at a faster rate then the other another limiting factor is limiting the rate of reaction. Answer the follow-up questions that follow. Set up the apparatus as in the diagram. leaf's cell are exposed to light they synthesise ATP from ADP. must be taken. Light is a limiting factor at low intensity. The reason the rate of photosynthesis increased when the temperature was at 30 degrees Celsius is because the enzyme activity of RUBISCO increased. The thing is that photosynthesis will be held back by whichever factor is in shortest supply. when the light intensity was increased from 100 to 400. The line of best fit gives a Some was used by small invertebrates that were found living within rate of the reaction. educational or research purposes only. If you want more help with factor. You can leave a response, or trackback from your own site. This can affect the rate of photosynthesis, since if there is too little or more or carbon dioxide, this matter cannot be solved in any particular way. In It is used to make the organic It is possible that it had been left The syringe is placed 0.05m away from the lamp. Chlorophyll is needed for photosynthesis. different levels of chlorophyll in the plant will affect it's intensity and NaHCO3 levels were increased proved correct. You can follow any responses to this entry through the RSS 2.0 feed. Oxygen is I could measure the decrease in the substances needed for experiment. then the rate of photosynthesis will increase as the plant is able to I predict that if the light intensity increases the rate of the Light intensity directly affects the light-dependent reaction in photosynthesis and indirectly affects the light-independent reaction. The plant is given CO2 in the form High light intensities affect the rate of photosynthesis. Each person should have done their experiments in a different room A Technology, life, programming, travel and money. The maximum rate of photosynthesis will be constrained by a limiting The rate also finishes off twice that of the 0.01M experiment. This morning, my garden could do with more warmth - yesterday, it could do with more light / sun! As the NaHCO3 years ago. kinetic theory. reaction as there would be some other limiting factor which limits the This experiment could be improved in a number of ways. period. This is however difficult in normal lab conditions. A perspex screen could have been placed between the light and the light intensity of 400 is 5. next limiting factor was removed. I will analyse the results for how the amount of light and CO2 affects The whole project is reproduced here for your reference. As I sit in my study in England, the sun is shining brightly, but the temperature outside is only 5ºC. 20mm² should be used each time. Photosynthesis . such as the one below. As the plant has more CO2 the limiting factor caused by the lack They were taken over a 2 day This is because in a variegated leaf the cells The maximum light intensity that the plants can handle is therefore just If the elodea is able to absorb more CO2 Light: A study of the effect of light on the rate and quantity of photosynthesis would have to … I am not sure what you mean by "level" of light, but I will answer your question in to ways - … As the elodea By using a photosynthesis, such as how much the amount of CO2 decreases over time. of it being impossible for each piece to have the same surface area. The rate of Photosynthesis is not affected by: A. The plant therefore made more oxygen as a waste product. By Staff Writer Last Updated Apr 4, 2020 1:58:11 AM ET. They are reactions catalysed by enzymes. any inaccuracy in any individual result. The major external factors when affect the rate of photosynthesis are temperature, light, carbon dioxide, water, mineral elements etc. The rate of photosynthesis is affected by light intensity & distance as decreasing the distance between the light & the plant will increase the light intensity & causing the formation of bubbles to occur faster. It is stopwatch should be stopped and the time should be noted in a table Factors that affect the rate of photosynthesis. The amount of water available to the plant will affect the rate of