Which of the following is true about starch and iodine diffusion? Starch was not able to diffuse through the membrane of the dialysis bag because it is positively charged. Iodine was able to diffuse through the membrane of the dialysis bag because it is negatively charged. Starch and iodine were both not able to diffuse through the membrane of the dialysis bag because they are very large molecules. Starch was not able to diffuse through the membrane of the dialysis bag because it is a very large polymer. Iodine was able to diffuse through the membrane of the dialysis bag because it is a small molecule. Starch and iodine switched places in the experiment because they both moved down their concentration gradients.

Which of the following is true about starch and iodine diffusion? Starch was not able to diffuse through the membrane of the dialysis bag because it is positively charged. Iodine was able to diffuse through the membrane of the dialysis bag because it is negatively charged. Starch and iodine were both not able to diffuse through the membrane of the dialysis bag because they are very large molecules. Starch was not able to diffuse through the membrane of the dialysis bag because it is a very large polymer. Iodine was able to diffuse through the membrane of the dialysis bag because it is a small molecule. Starch and iodine switched places in the experiment because they both moved down their concentration gradients.

Biomedical Instrumentation Systems

1st Edition

ISBN:9781133478294

Author:Chatterjee

Publisher:Chatterjee

Chapter19: Biomedical Laboratory Instrumentation

Section: Chapter Questions

Problem 4Q

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Which of the following molecules can diffuse across the dialysis tubing? a. Iodine b.Starch c.Glucose Which molecules that can diffuse across dialysis tubing would not be able to cross the semipermeable membrane of a cell wall? Explain your reasoning
In the dialysis bag experiment, what do you think will happen if we reverse the two solutions between the sac and the beaker for sac 4 (meaning sac 4 is filled with distilled water and beaker 4 is 40% sucrose)? Will the sac gain or lose weight? a water will not move because sac membrane is impermeable to sucrose; the sac will have no change in weight b water will not move because sucrose can move across the sac membrane to equilibrium; the sac will have no change in weight c water will move out of the sac; the sac lose weight d water will move into the sac even more; the sac will gain weight
Mictotubules are made of alpha, beta and gamma subunits beta subunits only alpha subunits only alpha and beta subunits
Can sucrose pass freely through the membrane of a dialysis tube? Explain using examples. (Biochemistry)
You have dialysis tubing that is permeable to water but not sucrose that contain 10 mL of varying concentrations of sucrose solutions that are placed in a beaker with 100 mL of water. In which beaker/bag combination will osmosis happen the fastest? 10% sucrose solution in the dialysis tubing 20% sucrose solution in the dialysis tubing 30% sucrose solution in the dialysis tubing 40% sucrose solution in the dialysis tubing
Can sucrose pass freely through the membrane of a dialysis tube? Explain. (Biochem)
What is glucose important for your body? Why is glucose especially important for the brain? Should glucose be in the blood of a healthy individual? Is it small? Does it get filtered through the filtration membrane at the glomerulus? Do you want to let glucose out in your urine? If glucose if filtered, but you want to keep it, what process does the nephron do to keep it? Should you have glucose in your urine if you are a normal healthy individual? What is a transport maximum? It means that we have so much glucose in the blood and in the filtrate that we cannot: _______________ it all. What hormone allows glucose to move from your blood INTO your cells? This hormone is the “key” that opens the “locked door” into your cells. What happens if you have diabetes mellitus and cannot produce (or produce enough) insulin? What symptoms does someone with diabetes mellitus (type I or type II)? Specifically:
(a) Insert the table with data for Experiment 1 Table 1. Osmosis in a model cell contents of dialysis bag contents of beaker mass at 0 min (g) mass at 15 min (g) mass at 30 min (g) mass at 45 min (g) 1 2% sucrose 2% sucrose 11.66 11.75 11.67 11.73 2 20% sucrose 2% sucrose 12.54 12.72 12.98 13.21 3 2% sucrose 20% sucrose 12.11 11.86 11.59 11.48 (b) Calculate the total change in volume with the appropriate units for each dialysis bag in the experiment. Bag 1: Bag 2: Bag 3: (c) Explain why the volume of each bag changed during the experiment.
You record the following results of a nitrate reductase broth that was inoculated with an unknown bacteria species and incubated for 48 hours. Step 1: Look for a gas bubble. There is a gas bubble. (You know that your unknown bacteria can ferment glucose. You are not sure if the gas is nitrogen gas or carbon dioxide gas, so you go onto step 2). Step 2: Add reagent A and B. There is no color change. Step 3: Add zinc. The broth turns red. What is your interpretation of this unknown bacteria? What type of gas is probably the product of this reaction and is in the Durham tube?
During plasmolysis, the volume of water will__________. During lysis, the volume of water will__________. A. decrease; increase B. increase; stay the same C. increase; decrease D. decrease; stay the same
This cell membrane is permeable to water and I2KI but not to carbohydrates. What will happen over time? Select all that apply. Question options: The environment is hypertonic. Water will exhibit a net movement out of the cell. I2KI will diffuse into the cell. Starch will diffuse out of the cell. Glucose will diffuse out of the cell.
The transport of nutrients across a membrane against a concentration gradient using protein carriers driven by the expense of energy is called Passive diffusion Phagocytosis Facilitated diffusion Pinocytosis Active Absorption

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		Starch was not able to diffuse through the membrane of the dialysis bag because it is positively charged. Iodine was able to diffuse through the membrane of the dialysis bag because it is negatively charged.
		Starch and iodine were both not able to diffuse through the membrane of the dialysis bag because they are very large molecules.
		Starch was not able to diffuse through the membrane of the dialysis bag because it is a very large polymer. Iodine was able to diffuse through the membrane of the dialysis bag because it is a small molecule.
		Starch and iodine switched places in the experiment because they both moved down their concentration gradients.