2a. Graph the change in weight versus the concentration of mannitol . Draw on the graph how you would estimate the water potential of the tissue
2b. Graph the change in length versus the concentration of mannitol. Draw on the graph how you would estimate the water potential of the tissue
3. From your graph what do you estimate the water potential of the potato tissue to be
4. Does the increase in tissue weight and length resulting from gaining water in the less negative water potential solutions eventually plateau and reach a maximum? Why? Explain this observation based on what we know about the two potential terms that contribute to total water potential in a plants cell or plant tissue
5. Why would the potato tissue shrink when it loses water (explain this in terms of pressure potential?)?
6. If you were using this technique with a tissue with very rigid, inelastic cell walls (such as a woody tissue) which measurement method would be least effective? why?© BrainMass Inc. brainmass.com October 17, 2018, 12:25 am ad1c9bdddf
change in weight versus the concentration of mannitol
Photosynthesis and Respiration
Cellular Respiration and Photosynthesis co-exist as paired processes. Photosynthesis converts light energy into organic molecules such as carbohydrates. These molecules are picked up and utilized as fuel sources in organisms that employ Cellular Respiration for production of ATP and CO2.
Although it appears that Photosynthesis has preceded Cellular Respiration by billions of years, the processes share many structural features.
Create a table comparing and contrasting the two processes. Include in your comparison variables such as organism type, energy source, cellular location, substrates/reactants/products, full and balanced chemical reaction, carrier molecules, and any other parameter you find relevant.
Apart from its essential role in cellular respiration, the mitochondrion is thought to be implicated in a variety of disease states as well as the process of ageing. The mitochondrion contains its own circular DNA molecule(s) (termed mtDNA) which largely encodes for proteins localized to the mitochondrion itself. Please provide a hypothesis and suggest an experiment to test the relationship between mtDNA and human ageing. Propose a direction for future research and drug development for targeting mtDNA to combat the ageing process.View Full Posting Details