The following results were obtained for the experiment: FLASK # LIGHT EXPOSURE OXYGEN GAS PRODUCED (mL) 1 Blue 2.0 2 Green 0.5 3 Yellow 0.5 4 Red 1.0 5 Covered with tin foil. 0 Based on the results of the experiment, which wavelengths of light does the plar use for photosynthesis?
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- Orygen Producte UI:01:01 Time Remaining Return Next Your experimental team has gathered data on the rate of a plantť's photosynthesis, measured by oxygen production, as the light intensity was increased. The graph below was created from your gathered data. Note: Diagram 4 may also be helpful in answering the questions. Use the information in order to answer questions #28 - 31. Diagram 7: Rate of Photosynthesis with increasing light intensity 200 150 14 100 15 -100 16 100 200 300 600 700 Light Intensity (arbitrary unts) Glossary: 1. Pmar: The maximum pressure of oxygen gas. 2. Arbitrary units: The use of this term mean the graph is not using specific units as labels. Light intensity could be measured in lumens and oxygen production could have been measured in mm of Hg 17 18 Select the best explanation for the oxgen production leveling off as the light increases in intensity. 19 More light prevents water from getting to the leaf cells to be split. Photosystem l and Il in the light…At your work station, you have a spectrophotometer set at 600 nm to measure DCIP absorbance and four (4) test tubes containing different solutions. One of the test tubes is labelled “0” to blank/zero the spectrophotometer. The other three (3) test tubes contain a reaction mixture from a Hill reaction experiment using isolated chloroplasts and DCIP as an electron acceptor. DCIP is present in the oxidized state and exhibits a blue color with an absorbance at 600 nm. Upon receiving the electrons, DCIP is reduced to form DCIP-H2 that is colorless. These three (3) tubes, labelled “A”, “B”, and “C” were exposed to different light conditions during the Hill reaction. The Light conditions were random, including No light, Red light, and Green light. Please note that chlorophyll preferentially absorbs the light with wavelength of 660 nm (red) when compared to that of 520 nm (green). Your mission is to determine which Tube came from which experimental light condition. Tube: Tube…100- 50- 400 450 500 550 600 650 700 Wavelength (nm) In the absorption spectrum shown above, what wavelength ranges are not efficiently absorbed by this photopigment? 400-450nm 450-700nm 450-650nm 650-700nm
- Photosynthesis is divided into light reactions and dark reactions. Define the purpose of each of these as well as the overall inputs and outputs for each stage. Edit View Insert Format Tools Table 12pt v Paragraph |BIU Av S OTE A O FEB étv MacBook Air F11 80 F8 F9 F10 F6 F7 F4 F5 2 F3 * へ 23 $ 6. 8. 4 R T Y U ETo assess photosynthesis, we relied heavily on a spectrophotometer to measure the color intensity of DCPIP in our solution. We set the spectrophotometer at wavelengths in the visible spectrum. What is the approximate wavelength range (in nm) for the visible spectrum? For example, the ultraviolet spectrum wavelength range is approximately 10-400 nmIn a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Describe the stages of photosynthesis. Explain the need for a constant supply of inorganic carbon dioxide.
- (g) The figure given below represents an experiment to demonstrate a particular aspect of photosynthesis. The alphabet 'A' represents a certain condition inside the flask. 2 КОН (i) What is the aim of the experiment ? (ii) Identify the special condition inside the flask. (iii) Name an alternative chemical that can be used instead of KOH. (iv) In what manner do the leaves 1 and 2 differ at the end of the starch test ?what is the role of singlet oxygen in photodynamic theraphy . give 10 points in detailIn a photosynthetic investigation, a student measured the following pH of the stroma and the inner thylakoid compartments of spinach leaf cells at the conclusion of the experiment. Source of Fluid pH (mean) Standard Error of Mean (SEM) Stroma 8.2 0.75 Inner compartment of thylakoid 5.6 0.35 Explain the reason for the differences in pH between the stroma and the thylakoid lumen.
- Use the counting method to estimate the length of an elodea cell. You will need to use your calculation for the FOV at 400x total magnification. Show work and don’t forget units! Elodea Leaf at 400x total magAn experiment was conducted to demonstrate that chlorophyll is essential for photosynthesis. The procedure followed is given below: • A potted variegated plant was destarched. • Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll). • A starch test was done on a leaf. • The potted plant was exposed to bright sunlight for 4–5 hours. • After 5 hours, a leaf was removed and tested for starch. How was the potted plant destarched? Explain why all the starch has disappeared during the process Mentioned in QUESTION 1. Describe the steps in the correct sequence that were followed during the starch test. Explain ONE safety precaution that should be taken when testing for starch. Draw a labelled leaf and indicate the colour change in the green and white parts of the leaf, after the second starch test.An experiment was conducted to demonstrate that chlorophyll is essential for photosynthesis. The procedure followed is given below: • A potted variegated plant was destarched. • Variegated leaves have green parts (where the cells contain chlorophyll) and white parts (where there is no chlorophyll). • A starch test was done on a leaf. • The potted plant was exposed to bright sunlight for 4–5 hours. • After 5 hours, a leaf was removed and tested for starch. ---------- 1. Draw a labelled leaf and indicate the colour change in the green and white parts of the leaf, after the second starch test.
