Discussion of all aspects of cellular structure, physiology and communication.
I have a quick question:
Why are the vacuoles in plants very large, sometimes up to 90% of the cell area; versus the animal cell where they are very small but more frequent?
My guess is because they are non-specialized and they store mainly complex polysacharides which have enormous chains compared to amino acids in an animal cell.
Thanks for any feedback!
i think I may have said this probably at least 100 times on this forum, but I'll say it again: animal cells have no vacuoles. The vacuole in plant, fungi and protozoan cells is nothing but a modified lysosome. In animal cells they are called lysosomes, are generally a lot smaller and have different roles. Why exactly plants have evolved to use a vacuole that is so big is probably a combination of using it to dump stuff and using it to maintain turgor. later the vacuole most likely evolved to also do the many complicated things it does nowadays...
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
it is important. you can call it whatever you want, but people seem to make a big confusion between a vacuole and a vesicle. i would have nothing against calling them lysosomes in all cells or calling them vacuoles in all cells. The reason they are called different is of course historic - dating back from the time people called everything round a vacuole. Now that we know what they are, it's important to make the distinction
excuse me? What might "recognize a sentence" mean?
jwalin: and MrMistery says, that plant vacuoles and animal lysosomes are basically the same.
MrMistery: I took some your post about something similar and changed it little to fit here
Cis or trans? That's what matters.
that's just a wrong way of saying yet. Of course I can't say it's wrong because you can just change the definition of a vacuole and it's fine. But nowadays in cell biology we are done with identifying things by the way they look. We identify things based on their origins and the proteins they contain. And by those standards the animal cell lysosome and the plant vacuole are the same. What your book is referring is either
2. some sort of intermediate in the endocytosis or exocytosis pathway, such as a multivesicular body or some other similarly strange structure.
Who is online
Users browsing this forum: No registered users and 1 guest