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https://www.youtube.com/watch?v=YP8hYJcIRuo
What direct, observable evidence do we have that starch was not able to diffuse through the membrane?
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- https://www.youtube.com/watch?v=YP8hYJcIRuo Explain how the experiment shown models a semi-permeable membrane. What direct, observable evidence do we have that starch was not able to diffuse through the membrane?Why does the pH of the cooking medium influence the texture of cooked fruits and vegetables? What cookery methods need to be employed to ensure adequate, but not excessive softening of cells?Why does honey stay at room temperature for months/years without "spoiling" or being affected by bacterial growth?
- Both H+ and Ca2+ are ions that move through thecytosol. Why is the movement of H+ ions so much fasterthan that of Ca2+ ions? How do you suppose the speed ofthese two ions would be affected by freezing the solution?Would you expect them to move faster or slower? Explainyour answer.Catalase combines two hydrogen peroxide molecules (H2O2+H2O2) to make two molecules of water. A gas also forms. What is the gas?Which of the following experimental approaches is likely must complete picture of a particular cell's metabolism? a. NMR spectroscopey b. Metabolic inhibitors c. Mass spectroscopy d. Isotopic tracers
- Eventually aquaporins come tothe end of their working life and need to bereplaced. To which organelle will an oldaquaporin be sent for hydrolysis?In which direction (into or out of the cell) will water flow incells of Escherichia coli (an organism found in your largeintestine) suddenly suspended in a solution of 20% NaCl?What if the cells were suspended in distilled water? If growthnutrients were added to each cell suspension, which (ifeither) would support growth, and why?Changes in temperature affect membrane properties. Howwould you expect the lipid composition of thermophilemembranes to differ from those of prokaryotes that live atmore normal temperatures?
- Which of the following extracellular enzymes and their substrate are MISMATCHED? Question 2 options: A Amylase- starch B Protease- amylase C Casienase- milk protein D Protease- casienase and gelatin E Gelatinase- gelatinWhat substance joins proteoglycans together into gigantic complexes called proteoglycan aggregates? These complexes can occupy very large volumes. a. hyaluronidase b. hyaluronic acid c. proteoglycase d. fibronectin e. lamininExplain the changes that milk undergoes when suitable starter / inoculum is added to it . How does the end product formed prove to be beneficial for human health ?
