6 Matching Annotations
- Jan 2022
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bio.libretexts.org bio.libretexts.org
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Solubility: As discussed earlier, nonpolar or lipid-soluble materials pass through plasma membranes more easily than polar materials, allowing a faster rate of diffusion.
Does solubility and its factors like temperature and pressure affect gases, solids, and liquids the same?
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Channel proteins
Is there a certain amount of substances that can travel through a channel protein at a time?
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A uniporter carries one specific ion or molecule. A symporter carries two different ions or molecules, both in the same direction. An antiporter also carries two different ions or molecules, but in different directions.
If anti porters take ions or molecules against a certain ion channel while symporters carry ions in the same direction. Does this affect the equilibrium?
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bio.libretexts.org bio.libretexts.org
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The plasma membrane is “selectively permeable”. This means it allows only some substances through while excluding others.
the plasma membrane is selectively permeable, what substances can permeate and what substances can't?
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these cells lack a nucleus. Instead, their genetic material is located in a self-defined area of the cell called the nucleoid. The bacterial and archaeal chromosome is often a single covalently closed circular double-stranded DNA molecule.
I thought every cell has a nucleus but I just learned otherwise, is this because unicellular cells are lacking of a specific structure? #curious
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growing stromatolites have been found in the Anza-Borrego Desert State Park in San Diego County, California.
If stromatolites grow with the help of water and metabolic activity, how can it be found in a desert in San Diego? #question #interesting
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