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2. a) Describe what is happening in Calvin Cycle in plain English! (how would you describe this step for someone who hasn’t taken Biol)
b) If someone wanted to perform an experiment to evaluate the output of a particular step, which variable would be the best option to measure? (Think about which variable is UNIQUE to each step!)
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- 1. What are the process of light-dependent reaction? Use the pyramid diorama in outlining the process of light-dependent reaction. 2. What are the process of Calvin cycle? Use the pyramid diorama in outlining the process of Calvin cycle.Which of the following substances does not participate in the Calvin-Benson cycle? a. ATP c. NADPH e. PGAL b. O2 d. RuBP f. CO2C.B. van Niel is famous for his discoveries regarding photosynthesis in sulfur bacteria. Which of the following statements is true of his experiments? a. Van Niel found that oxygen created by plants is derived from water, not carbon dioxide b. He found that sulfur bacteria do not use light, but instead use hydrogen sulfide as a source of energy for producing sugars. c. Sulfur bacteria used water to produce hydrogen sulfide d. From his observations, he reasoned that all producers require a hydrogen source, but that source can vary. e. Both a) and d)
- What is an example of a lab experiment that shows the variation of the photosynthesis efficiency in relation to different photic energy frequencies to which the reaction is exposed? Was it expected that green light frequency favored the reaction?In 1941, biologists exposed photosynthesizing cells to water containing a heavy oxygen isotope, designated 180. The "labelled" isotope appears in the 02 gas released in photosynthesis, showing that the oxygen came from water. Where would the 180 have ended up if the researcher had used 180-labeled CO2 instead of H2O? A. ADP B. NADP+ C. Rubisco D. DP and NADP+ E. Glucose1) When a leaf on an oak tree absorbs 15,440 photons, how many glyceraldehyde-3-phosphate molecules can be produced by the Calvin cycle? b)When a leaf on an oak tree absorbs 15,440 photons, how many glyceraldehyde-3-phosphate molecules can be produced by the Calvin cycle?
- Both temperature and light intensity can affect the rate of photosynthesis. However, in this study, the investigator kept the temperature constant and only studied how changes in light intensity affected the rate of photosynthesis, Which of the following best explains the investigator's decision to only study light intensity? Select one or more: a. It is easier to control light intensity than it is to regulate temperature, therefore the investigator chose to measure only light intensity b. Light intensity affects the rate of photosynthesis more than temperature, therefore the investigator chose to measure only light intensity c. none of the answers is correct d. If different light intensities and different temperatures had been studied at the same time, it would not be possible to know which of these factors affected the rate of photosynthesis.Why do you think photosynthesis and cellular respiration are important? Please explain thoroughly.a. What is photosynthesis and what is its importance to plant growth and primary productivity? b. What is the balanced equation for photosynthesis and how does it differ from cellular respiration? c. What are the key components of the light and dark reactions and how do you differentiate one from the other? d. How is photosynthesis measured? e. What are the environmental influences on photosynthesis? f. Include illustrations or figures appropriately. g. List your major references (at least five and no more than 10 references)
- You performed an experiment on photosynthesis on Elodea, using bromothymol blue as an indicator forpH. Your two light conditions were red light and blue light. You found that in blue light, your solutionturned a nice cobalt blue, and in red light it turned green.a. What can you conclude about the efficiency of photosynthesis in Elodea regarding those twowavelengths?b. What would your conclusion be if your negative control (no Elodea in white light) turned greenalso?In measuring photosynthesis in crop species, you find that two species respond differently to a decrease in the concentration of O2 in the gas surrounding the leaf. One species (Species A) maintains a constant rate of photosynthesis in both high and low O2 concentration while the other exhibits a significant increase in photosynthesis in the low O2 environment. a. Propose a hypothesis to explain this observationb. b. Propose an experiment to test your hypothesis (assume you have access to any necessary tracers and lab facilities).How would your understanding be different if the experiment had only looked at the overall results on the light reactions, instead of looking at how salinity affected each photosystem?