Background information on cell size lab

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What is it used for?

What would you predict if you used a starch solution instead of the protein? More molecules would have been able to enter the solution in the dialysis bag easier, therefore, increasing the final mass of the solution.

Surface Area to Volume Ratio Explained

Can you diagram the flow of water based upon the contents of your model cell and the surrounding solution? I could draw the cup of distilled water with the dialysis tubes filled with the solutions in them. Then, I could draw in arrows to show whether or not water goes into the tubes. When will the net osmosis rate equal zero in your model cells?

Osmosis lab/ concentrations of solutions effect on potatoes mass.

Based upon your observations, can you predict the direction of osmosis in living cells when the cells are placed in various solutions? How is the dialysis tubing functionally different from a cellular membrane? Movement of molecules across dialysis tubing is down a concentration gradient. From an area where.

Read More. Words: - Pages: 5. Essay Diffusion In Agar Cubes water, oxygen, and cellular wasted are transported between living cells and their environment. Words: - Pages: 4. Essay Diffusion And Its Effect On Concentration Introduction Diffusion is a process whereby the net movement of a molecule, atom, or ion goes from an area of high concentration to an area of low concentration.

Words: - Pages:. Words: - Pages: Words: - Pages: 6. Essay Gas Exchange : Mammals, Fish And Insects Gas Exchange in Mammals, Fish and Insects Gas Exchange is a biological delivery of oxygen from the air or water to the bloodstream or cells in the bodies of mammals, fish or insects while also getting rid of carbon dioxide. Essay Chapter 10 Assessment limited. Popular Essays. Ready To Get Started? Create Flashcards. Discover Create Flashcards Mobile apps. I make bromothymol blue agar see recipe below , but you just need something safe that will change color as it changes pH.

Students cut various sizes of cells and place them in vinegar to watch -- and time -- the movement of color change as the vinegar diffuses in turning the blue to yellow.

Current best practices in single‐cell RNA‐seq analysis: a tutorial

The winning design for Isn't it amazing how much it models intestinal villi and we didn't even learn about that yet! This process allows students to confront a lot of misconceptions of cell design. We sometimes run a second race after a trial run, so students can improve designs. I make a lot of agar just in case. It's a fun learning day!

The variety of cell designs from my class The winning design for This is AGAR , not agarose. Note: 15g is thicker than you would make for growing bacteria, because you want the agar stiffer and tougher for handling. It is better to use plain agar and not LB agar, so it has less of a chance to grow bacteria.

Simple Electrical Cell - MagLab

Boil slowly in microwave or hot water bath until agar is melted granules will disappear. Watch for and avoid boil-over. Remove from heat. Add 0. If the mixture is not dark blue, then add more bromothymol blue. If the mixture is green or yellow, you will need to stir in drops of NaOH or another base until it turns blue.

Wear safety goggles and gloves when handling NaOH.


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Pour the agar into trays. For the initial lab, I make the agar in rectangular trays, like a wide silverware tray or a square Pyrex dish -- enough to be at least 2cm deep -- and slice chunks for the students to cut from. I use the tops of my microcentrifuge storage boxes most of the time: See this image , but just tape that little curved indent with masking tape For the actual contest, I mold them in ice cube trays that I bought at Amazon and use a spatula or butter knife to remove the gelatinous cubes.

Make enough for ice cubes per student or student group.

Use cubes of agar to investigate how size impacts diffusion.