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An action spectrum for photosynthesis was described by Engelmann through the use of measurements of oxygen generation using aerotactic bacteria… There was an roughly proportional relationship between the number of bacteria clustered at each wavelength (color) and the amount of oxygen that was being produced by that section of the alga.
How can you determine how much oxygen is being produced?
Calculating the rate of photosynthesis based on the amount of oxygen produced
Either by counting the bubbles that emerge from the pondweed over a period of time or by using the Audus apparatus to measure the amount of gas that emerges over a period of time, oxygen may be quantified.
What assumptions did Engelmann make in order?
In order for Engelmann to arrive at the conclusion that red and violet-blue light were more successful than green light in stimulating photosynthesis, what assumptions did Engelmann make? They are able to take in wavelengths of blue and green light while reflecting yellow and red light. Carrots are a good source of the pigments known as carotenoids, which can be obtained through food.
How did Engelmann determine how much photosynthesis was taking place?
It was Engelmann’s intention to demonstrate that the wavelength of the light had an effect on photosynthesis as well as the creation of oxygen… After that, he used each of the different colors of light to illuminate a filamentous green algae. He then added some aerotactic bacteria, which went to the oxygen zones, so that he could monitor the rate of photosynthesis.
What part did the algal cells play in Engelmann’s experiment, and how did they play it?
Because of this experiment, Engelmann was able to establish which wavelengths (colors) of light are the most effective at driving photosynthesis…. The photosynthetic pigments in the alga took in part of the wavelengths of light, and then used the energy that they had taken in to power the chemical reactions that make up photosynthesis. One of these reactions is the generation of oxygen.
Aerotaxis, Chemotaxis, and Phototaxis are the three types.
41 questions found in related categories
What exactly was the experiment that Engelmann did?
His experiment in 1882 measured the effects of different colors of light on photosynthetic activity and showed that the conversion of light energy to chemical energy took a certain amount of time. Theodor Wilhelm Engelmann was a German botanist, physiologist, microbiologist, university professor, and musician. He was born on November 14, 1843, and passed away on May 20, 1909. His full name was Theodor Wilhelm Engelmann.
Which wavelengths of light cause the highest rate of photosynthesis, and which two of these answers are the best choices?
*Which wavelengths of light cause the greatest amounts of photosynthesis to take place? Choose the two most appropriate responses. When it comes to promoting photosynthesis, the areas of the visible spectrum that are red and violet-blue are the most effective.
What did Engelmann come to the conclusion of?
In light of the fact that bacteria tended to congregate in red and blue zones, Engelmann came to what conclusion? … He first introduced aerobic microorganisms, and then he observed where in the environment the bacteria clustered. He observed that the areas that were lighted by the red and blue light included the largest groups of individuals.
In the process of photosynthesis, what wavelengths are absorbed?
Chlorophyll and other photosynthetic pigments generate electrons when they absorb specific wavelengths of light, which powers the process of photosynthesis. Chlorophyll a, which absorbs wavelengths in the violet-blue and reddish orange-red ranges, is present in all organisms capable of photosynthesis. Chlorophyll a is able to reflect wavelengths of green and yellow-green color.
What exactly is the process that is referred to as photorespiration?
The process of photorespiration involves the light-dependent intake of molecular oxygen (O2) in conjunction with the release of carbon dioxide (CO2) from organic substances. Photorespiration is also known as photosynthesis. The gas exchange is analogous to respiration, but it is the opposite of photosynthesis, which results in the fixation of CO2 and the release of O2.
Which wavelengths of light are most effective in driving the chemical reactions that occur during photosynthesis?
Together, the wavelengths of light ranging from blue to violet and orange to red are those that are most efficiently absorbed by chlorophylls a and b. Because violet wavelengths have the highest energy in the visible light range (owing to their shorter wavelengths), they have the potential to supply the most energy for the process of photosynthesis.
Which wavelengths of light does a 430-nm pigment take in?
It is conceivable that a pigment of 430 nm absorbs blue light.
Which wavelength has the greatest impact on how effectively photosynthesis is driven?
The blue range (425-450 nm) and the red range (700-800 nm) contain the visible light wavelengths that are most effective for photosynthesis. Because of this, the most effective light sources for photosynthesis are those that generate light in the blue and red regions.
How do you identify aerobic respiration?
- The word equation for aerobic respiration is:
- glucose + oxygen → carbon dioxide + water + energy released.
- It is necessary for you to be familiar with the following chemical symbols:
- The process of respiration involves a chain of chemical reactions, but this describes the big picture.
How can you make the most of the oxygen that you produce?
- Take in some clean air. Turn on the air conditioning and step outside…
- Drink water. Our lungs require adequate hydration in order to be able to oxygenate blood and expel carbon dioxide; oxygen levels are, as a result, influenced by the amount of water that is consumed…
- Consume meals that are high in iron…
- Exercise. …
- You should work on your breathing.
Is it possible to create oxygen using water?
It is possible to achieve this result by utilizing a technique known as electrolysis, which entails passing an electric current through a sample of water that also contains a soluble electrolyte. This causes the water to be broken down into its component parts, oxygen and hydrogen, which are then released independently at the two electrodes.
Why is it necessary for there to be six molecules of CO2 during photosynthesis?
Because each molecule of carbon dioxide (CO2) only contains one carbon, the production of one molecule of glucose (C6H12O6) requires the addition of six molecules of carbon dioxide (CO2).
What kinds of products are produced at the end of the processes of photosynthesis and aerobic respiration?
During the process of photosynthesis, carbon dioxide and water are converted into glucose and oxygen. But, during the process of respiration, glucose and oxygen are converted back into carbon dioxide and water.
What kinds of wavelengths are taken up by plants?
Although it varies from person to person, visible light can be described as having wavelengths between 380 and 750 nanometers (nm), which spans the spectrum from light that is very low blue to light that is very far red. It is common practice to refer to the wavelength range between 400 and 700 nanometers as the photosynthetically active radiation (PAR) because this is the range that plants use to promote photosynthesis.
What exactly does Engelmann provide to the team?
Theodor Wilhelm Engelmann (1843-1909), a man who had a creative life in music, muscular physiology, and microbiology, devised a sensitive method for tracing the photosynthetic oxygen production of unicellular plants by means of bacterial aerotaxis. This method was named after him.
Which type of organism did Engelmann choose to study for his experiment?
For the experiment, he utilized photosynthetic algae, and while he did expose the algae to the visible spectrum, he made sure to use distinct types of algae for each color of light.
Why is Engelmann bacterium so sensitive to oxygen?
This chart provides a succinct summary of the findings from his experiment. Why did Engelmann choose to employ microorganisms that were sensitive to oxygen? O2-sensitive bacteria were drawn to the areas on the microscope slide made by Engelmann where algae were actively engaged in the process of photosynthesis. Plants are autotrophic photosynthetic organisms.
Which wavelength of light is absorbed the most efficiently by photosystem 2?
The chlorophyll a special pairs that make up each of the two photosystems are able to absorb light of varying wavelengths. The optimal absorption wavelength for the PSII special pair is 680 nm, whereas the optimal absorption wavelength for the PSI special is 700 nm.
Which particular wavelength of light can chlorophyll b absorb most effectively?
The greatest amount of violet and orange light is taken in by chlorophyll a. Chlorophyll b is primarily responsible for the absorption of blue and yellow light. Both of these things are also able to absorb light of other wavelengths, albeit at a lower intensity.
Which of the following wavelengths of light, as shown in figure 10.1, has the greatest impact on the rate of photosynthesis?
The sections of the visible light spectrum located in the violet-blue and red regions are the most efficient at driving photosynthesis.