In the process of isolating the enzyme amylase, you used methanol: O a. To precipitate the polar enzyme Ob. To dissolve the starch Oc To dissolve the sugar O d. To precipitate the non-polar enzyme O e. To help the enzyme catalyze the reaction.
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- in your own words, describe what would haooeb to the phospholipids f the plasma membrane in animals cells if cholesterol was not rpesent and the cell was expoed to extremely low temperatures?Which of the following statements are acceptable and why? [Whereas all the carbohydrate in the plasma membrane faces outward on the external surface of the cell, all the carbohydrate on internal membranes faces toward the cytosol.] [Although lipid molecules are free to diffuse in the plane of the bilayer, they cannot flip-flop across the bilayer unless enzyme catalysts called phospholipid translocators are present in the membrane.]A 10,000L bioreactor may have 100 trillion cells. Let’s assume that this cell solution has the same density as water a. How many cells per kilogram is this? b. How many cells does the typical human body have? c. What cell density is this (per kg)?
- Suppose that liver cells were placed into a bowl containing hypotonic solution. What would you observe? Question options: a) The liver cells would lyse or burst. b) The liver cells would remain the same in both their size and their shape. c) The liver cells would start to generate more intermediate filaments for cellular protection. d) The liver cells would begin to initiate cholesterol synthesis. e) The liver cells would shrivel or crenate.Which of the following statements is a lie? Select one: a.Winemaking tanks that ferment grape juice into wine need to have pressure-release valves. b.Mammalian red blood cells undergo lactic acid fermentation. c.Large quantities of alcohol are toxic to humans, but not to the yeasts that ferment the alcohol. Which of the following statements is a lie? Select one: a.The formation of water aids in establishing the ion gradient between the inner matrix and intermembrane space. b.Every protein complex in the electron transport chain is involved in the direct pumping of H+ in the intermembrane space. c.There is an existing electrochemical gradient between the intermembrane space and the inner mitochondrial matrix.Assume that mitochondria contain 0.35 Molar KCL and 0.012 Molar NaCl. Calculate the grams per liter, of a carbohydrate similar to glucose with a molecular weight 137 amu, that will have the same osmolarity as the mitochondria.. Calculate answer to four decimal places. NB! the comma seperates thousands, the dot is for decimals.Do NOT specify units in your answer.
- Order Ca2+, CO2, ethanol, glucose, RNA, and H2Oaccording to their ability to diffuse through a lipid bilayer,beginning with the one that crosses the bilayer most read-ily. Explain your order.Upon swapped changes in cell compartment, describe the advantage or disadvantage that in each of the eukaryotic and prokaryotic cells. In your view, explain why carbohydrates is the most predominant type of food in the world's diet? Explain shortly.Steroids such as Estrogen or Testosterone are lipids which are found in the cytoplasm of living cells. They can pass across (dissolve in) the proto cell and prokaryote phospholipid bilayer because they: a) perform dehydration synthesis, b) dissolve in water, c) are ionic, d) they a soluble in the Fatty Acids of the bilayer, e) none are true.
- In the experiment of Racker and Stoeckenius, bacteriorhodopsin wasoriented in such a way that it pumped H into a vesicle. Each vesicleactually contained many molecules of bacteriorhodopsin. How wouldthe results have been affected if 50% of the bacteriorhodopsin moleculespumped H into the vesicle and 50% pumped H out of the vesicles?a. The same amount of ATP would be made in the presence of light,and no ATP would be made in the dark.b. More ATP would be made in the presence of light, and no ATPwould be made in the dark.c. No ATP would be made in the presence of light, and no ATP wouldbe made in the dark. d.No ATP would be made in the presence of light, but some ATPwould be made in the dark.e. Some ATP would be made in the presence of light, and some ATPwould be made in the darkDO NOT COPY THE ANSWER FROM THE SAME QUESTION. Sassa, a biology professor, wanted to demonstrate to her students the applicability of a dialyzing membrane (DM) as a model for the cell membrane by enclosing an aqueous solution in a DM bag and immersing in a beaker containing a different solution. Substances available which are permeable to the DM include 0.02 M NaCl, 0.03 M glucose, and 0.01 M glucose. The only substance available which is completely impermeable to the DM is the 0.01 M lactose. Using the substances given and materials such as a beaker, stirring rod, and string, draw ONLY ONE set-up that can be demonstrated by Ms. Sassa that will satisfy ALL of the following conditions:a. No solute will exhibit a net diffusion out of the cell.b. Glucose will exhibit a net diffusion into the cell.c. NaCl will exhibit a zero net d. No net movement of lactose from the inside to outside of the cell. Make sure to label properly the substance inside the beaker and inside the DM bag.You have a beaker filled with a solution containing 2M glucose, 4M urea and 1M salt.Suspended in the solution is a cell that containing a solution of 1M glucose, 8M urea and 3Msalt. The membrane of the cell is permeable to glucose and salt but not urea. Answer each of thefollowing questions:a. Where will water move?b. Where will urea move?c. Where will glucose move?d. Where will salt move?e. What will happen to the volume of fluid inside the cell?f. What will happen to the osmolarity of the fluid inside the cell?