More specifically, however, this experiment focused on the photo part of photosynthesis, or the light dependent reactions in chloroplasts. Light dependent reactions require the presence of light to function, so that this light can be taken to create ATP and to reduce NADP+ to NADPH. Consequently, light dependent reactions shut down in the absence of light, thereby stopping the production of ATP and NADPH (Sadava et al. 2012). With this information, an experimental hypothesis can be formed that the presence of light will cause the redox activity of the spinach chloroplasts to increase, while the absence of light will cause this activity to decrease. One possible null hypothesis could be that there will be no significant difference in redox activity between spinach chloroplasts that are under light and in the dark. Therefore, the alternative hypothesis must be that there will be a difference in this activity between the two groups of chloroplasts. To test these hypotheses, chloroplasts were extracted from spinach leaves in order to create enriched chloroplasts, which were a vital…
The conditions of CO2 and light that I would suggest a student to use would be blue light and having the CO2 levels at 7.5 along with the intensity of the light being at 7.5 also because this would allow the plant to intake good colours of the light spectrum and it would allow a good amount of intake of carbon dioxide and if the intensity of the light it strong than photosynthesis would move at a faster rate…
1. Based on what you already know about photosynthesis, develop a testable hypothesis to explain the influence of an increase in light intensity on the photosynthetic rate in tomato leaves.…
In this study, we are interested in examining the effects of photosynthesis in spinach leaves in the presence of different light conditions. The light conditions that will be tested are no light, white light and green light. Therefore, we hypothesized that the O2 rate of consumption would occur more in the green light condition and CO2 rate of consumption would occur more in the no light condition.…
The purpose of this experiment is to see how different concentrations of carbon dioxide affect the rate of photosynthesis in spinach leaves.…
Hypothesis: If there is a change in the light received or temperature, then the rate of photosynthesis will be affected.…
Given that we are testing the amount of CO2 and O2 produced by spinach leaves depending on the amount of light causes opposite results. If the chamber were placed under a turned on bulb, there would be a…
The objective of this study was to figure out how different light colors affected the rate of photosynthesis in spinach leaves. This was done by taking leaf disks, removing the CO2 and sinking them in beakers. One beaker filled with regular water, the other filled with a mixture of water and sodium bicarbonate. The beakers were then placed in front of the light sources and the amount of disks floating was recorded every minute. In our study the disks exposed to the red light started to float sooner than the…
as an indirect measure of photosynthetic activity.The lab allows the examination of the effects of…
The overall experiment consisted of three smaller experiments as a result of the different properties chlorophylls possess and the need to test them individually to receive the most accurate results. Preparation for the lab began with selecting a medium to large spinach leaf and deveining it. Once the spinach was prepared, it was ground in 5 mL of 100% acetone, creating a green acetone extract. The extract was filtered through a funnel with a kimwipe and into a test tube. The volume of the filtered extract was estimated, and one half of the estimated volume of petroleum ether was added to the solution, along with two drops of water. The test tube was then inverted to ensure it was properly mixed, and the phases could separate.…
This experiment is concerned with identifying photosynthetic pigments found in spinach plants and determining the spectrum of light each absorbs. By using paper chromatography, different pigments of spinach leaves can be separated. The knowledge gained in this experiment is relevant to understanding how the process of photosynthesis works. A Real-world application for this includes the harvesting of clean energy sources, as scientific advances have led the way to artificial photosynthesis on the path to replace fossil fuels (Nath, 237).…
In procedure two, the purpose was to see if the darkness of a plant would affect the amount of cellular respiration that occurred. My hypothesis was that if the lettuce was darker then it would show more cellular respiration than that of a lighter shaded plant.…
Please note: if you are applying for an HE course you may need to apply via UCAS (please see our website for information)…
The US photo film market is 670 million rolls units and divided into four segments. As shown in Exhibit 1, the Superpremium segment with an average retail price of $4.35 accounts for roughly 5% of the market. The Premium brand segment has an average retail price of $3.49 and accounts for a 67.67% market share. The fast growing Economy brand segment occupies about 13.34% of the market with an average retail price of $2.91. Finally the Price Brands segment occupies 14% of the market with an average price of $2.40.…
"She must do something, stop them, call for help. She wanted to put her hand on her husband's sleeve, to pull him down, but for some reason she didn't" (P2L36)…