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BIOL 103 University of Maryland Photosynthesis and Respiration Lab Report
Data Sheet: Activity – Photosynthesis and Respiration All Content is Copyright Protected and May NOT Be Posted or Shared Outside Of The Classroom Name Course Date BIO 103 21 Sep 2022 Activity Data Code Procedure I – Net Photosynthesis Rates – 100% Illumination Complete the tables below using your data and information found under the Background tab (see the Summary of Needed Formulas section) Leaf Sample Type Illumination Level Oxygen Concentration Change Data (ppm) Elapsed Time (s) SunAdapted 100% 18.20 40 ShadeAdapted 100% -18.20 40 Leaf Sample Type Illumination Level Carbon Dioxide Concentration Change Data (ppm) Elapsed Time (s) SunAdapted 100% 11.04 40 ShadeAdapted 100% -11.04 40 TableTop Science – All Rights Reserved Oxygen Change Rate (ppm/s) Carbon Dioxide Change Rate (ppm/s) 1 Observations and Questions [1] How is chlorophyll involved during photosynthesis? It is the job of the chlorophyll to absorb the light into the plant and transfer that light into energy. This energy is then used through photosynthesis. [2] What are enzymes? What role do they play in biological and chemical reactions? Enzyme is a substance produced by a living organism. They increase the speed of chemical reactions within the cells. [3] How might differences in enzyme concentrations affect rates of photosynthesis and respiration? The chemical reactions involved in photosynthesis are controlled by enzymes. The temperature increases therefore, the rate of photosynthesis also increases. But, in high temperatures, enzymes are denatured, and this will decrease the rate of photosynthesis. [4] Show your oxygen change rate calculation for the Sun-Adapted data run. 18.20 ppm [5] Show your carbon dioxide change rate calculation for the Shade-Adapted data run. -11.04 [6] Review the chemical reaction for photosynthesis and then carefully examine your results from Procedure I. Do your results support the relationship between oxygen and carbon dioxide shown in the chemical reaction? Explain. Cite your results as part of your explanation. [7] Using your results for change in oxygen concentration as a reference, discuss whether your results from Procedure I confirm research findings about differences in the amount of chlorophyll production for sun-adapted and shade-adapted leaves. [8] What is the difference between photosynthesis rate and net photosynthesis rate? Which rate are you determining in this procedure? Explain. [9] Explain why (or why not) you would expect respiration to occur when the illumination is 100%? 2 TableTop Science – All Rights Reserved Procedure II – Respiration Rates – 0% Illumination Data Run Complete the tables below using your data and information found under the Background tab (see the Summary of Needed Formulas section) Leaf Sample Type Illumination Level SunAdapted 0% ShadeAdapted 0% Leaf Sample Type Illumination Level SunAdapted 0% ShadeAdapted 0% Oxygen Concentration Change Data (ppm) Elapsed Time (s) Oxygen Change Rate (ppm/s) Carbon Dioxide Concentration Change Data (ppm) Elapsed Time (s) Carbon Dioxide Change Rate (ppm/s) Observations and Questions [10] Sample Calculation: Show your oxygen change rate calculation for the Sun-Adapted data run. TableTop Science – All Rights Reserved 3 [11] Sample Calculation: Show your carbon dioxide change rate calculation for the ShadeAdapted data run. [12] What would be the photosynthesis rate if you measured it at 0% illumination in Procedure II? Explain your answer. Cite your results from Procedure I to assist with your explanation. [13] Cite your results for the change in carbon dioxide concentration in Procedure II as a reference and compare the rates of cellular respiration for sun-adapted and shade-adapted leaves. Explain the biological principles/bases underlying this comparison. Procedure III – Low-Light Net Photosynthesis Rates – 15% Illumination Complete the table below using your data and information found under the Background tab (see the Summary of Needed Formulas section) Leaf Sample Type Illumination Level SunAdapted 15% ShadeAdapted 15% Oxygen Concentration Change Data (ppm) Elapsed Time (s) Oxygen Change Rate (ppm/s) Observations and Questions [14] Sample Calculation: Show your oxygen change rate calculation for the Sun-Adapted data run. 4 TableTop Science – All Rights Reserved [15] Based on the data you collected in Procedures I (100% illumination) and III (15% illumination), which system of leaves produces the most oxygen: Sun-adapted or shadeadapted? Explain how your results support your answer. [16] Are your results from Procedure II and Procedure III consistent with research findings that there are differences in chlorophyll production and enzyme activity between shade-adapted leaves and sun-adapted leaves? Explain your reasoning. Cite your results from Procedure II and Procedure III to support your explanation. TableTop Science – All Rights Reserved 5 Procedure 1 Procedure 2 Procedure 3
- Grid View
| Excellent | Good | Fair | Poor | ||
| Main Posting | 45 (45%) – 50 (50%) Answers all parts of the discussion question(s) expectations with reflective critical analysis and synthesis of knowledge gained from the course readings for the module and current credible sources.
Supported by at least three current, credible sources.
Written clearly and concisely with no grammatical or spelling errors and fully adheres to current APA manual writing rules and style. | 40 (40%) – 44 (44%) Responds to the discussion question(s) and is reflective with critical analysis and synthesis of knowledge gained from the course readings for the module.
At least 75% of post has exceptional depth and breadth.
Supported by at least three credible sources.
Written clearly and concisely with one or no grammatical or spelling errors and fully adheres to current APA manual writing rules and style. | 35 (35%) – 39 (39%) Responds to some of the discussion question(s).
One or two criteria are not addressed or are superficially addressed.
Is somewhat lacking reflection and critical analysis and synthesis.
Somewhat represents knowledge gained from the course readings for the module.
Post is cited with two credible sources.
Written somewhat concisely; may contain more than two spelling or grammatical errors.
Contains some APA formatting errors. | 0 (0%) – 34 (34%) Does not respond to the discussion question(s) adequately.
Lacks depth or superficially addresses criteria.
Lacks reflection and critical analysis and synthesis.
Does not represent knowledge gained from the course readings for the module.
Contains only one or no credible sources.
Not written clearly or concisely.
Contains more than two spelling or grammatical errors.
Does not adhere to current APA manual writing rules and style. | |
| Main Post: Timeliness | 10 (10%) – 10 (10%) Posts main post by day 3. | 0 (0%) – 0 (0%) | 0 (0%) – 0 (0%) | 0 (0%) – 0 (0%) Does not post by day 3. | |
| First Response | 17 (17%) – 18 (18%) Response exhibits synthesis, critical thinking, and application to practice settings.
Responds fully to questions posed by faculty.
Provides clear, concise opinions and ideas that are supported by at least two scholarly sources.
Demonstrates synthesis and understanding of learning objectives.
Communication is professional and respectful to colleagues.
Responses to faculty questions are fully answered, if posed.
Response is effectively written in standard, edited English. | 15 (15%) – 16 (16%) Response exhibits critical thinking and application to practice settings.
Communication is professional and respectful to colleagues.
Responses to faculty questions are answered, if posed.
Provides clear, concise opinions and ideas that are supported by two or more credible sources.
Response is effectively written in standard, edited English. | 13 (13%) – 14 (14%) Response is on topic and may have some depth.
Responses posted in the discussion may lack effective professional communication.
Responses to faculty questions are somewhat answered, if posed.
Response may lack clear, concise opinions and ideas, and a few or no credible sources are cited. | 0 (0%) – 12 (12%) Response may not be on topic and lacks depth.
Responses posted in the discussion lack effective professional communication.
Responses to faculty questions are missing.
No credible sources are cited. | |
| Second Response | 16 (16%) – 17 (17%) Response exhibits synthesis, critical thinking, and application to practice settings.
Responds fully to questions posed by faculty.
Provides clear, concise opinions and ideas that are supported by at least two scholarly sources.
Demonstrates synthesis and understanding of learning objectives.
Communication is professional and respectful to colleagues.
Responses to faculty questions are fully answered, if posed.
Response is effectively written in standard, edited English. | 14 (14%) – 15 (15%) Response exhibits critical thinking and application to practice settings.
Communication is professional and respectful to colleagues.
Responses to faculty questions are answered, if posed.
Provides clear, concise opinions and ideas that are supported by two or more credible sources.
Response is effectively written in standard, edited English. | 12 (12%) – 13 (13%) Response is on topic and may have some depth.
Responses posted in the discussion may lack effective professional communication.
Responses to faculty questions are somewhat answered, if posed.
Response may lack clear, concise opinions and ideas, and a few or no credible sources are cited. | 0 (0%) – 11 (11%) Response may not be on topic and lacks depth.
Responses posted in the discussion lack effective professional communication.
Responses to faculty questions are missing.
No credible sources are cited. | |
| Participation | 5 (5%) – 5 (5%) Meets requirements for participation by posting on three different days. | 0 (0%) – 0 (0%) | 0 (0%) – 0 (0%) | 0 (0%) – 0 (0%) Does not meet requirements for participation by posting on 3 different days. | |
| Total Points: 100 | |||||
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