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nucleolus would not be an organelle in the cytoplasm, it is located in the nucleus instead as an assembly of nucleic acids and proteins
aaand how exactly is the ribosome an organelle? ;-) c) is right.
guys willing to help me?
I think it's A, the nucleolus. But the ribosome certainly isn't an organelle.
Under the more restricted definition of membrane-bound structures, some parts of the cell do not qualify as organelles. Nevertheless, the use of organelle to refer to non-membrane bound structures such as ribosomes is common. This has led some texts to delineate between membrane-bound and non-membrane bound organelles. These structures are large assemblies of macromolecules that carry out particular and specialized functions, but they lack membrane boundaries. Such cell structures include: ribosome cytoskeleton flagellum centriole and microtubule-organizing center (MTOC).
weird definition...and I always thought organelles were membrane-surrounded compartiments inside the cell. okay, under that definition, I apologize for trolling earlier ;-) it would be the nucleolus, then.
It depends on which textbook you read. I call organelles "membrane bound" too. I call things like ribosomes and centrioles "macromolecular complexes." You're sharp to notice it; I honestly read right over it in this problem.
can someone help me please :)
please stop spamming and rather take part in solving this problem, Ms.Math. =)
but, i agree with blues on the point of what defines an organelle. along of your definition, enzymes like rubisco would define as organelles too, wouldn't they? and all solvable structures/enzymes (not membrane-bound structure)
you = wulusi =)
I would agree with you that the question should have been more specific, no worries :) These definitions tend to change without a moment of notice, they are subject of intense debate among biologists, lets just hope they agree on something eventually :)
like IUPAC, you mean? that ship is long sailed ^^ the teacher will define the right answer. I remember a multiple-choice test where we got a question "what would you do if you own a big chemical company and wanted to expand to india? watch out that every worker is safe and industrial standards from the west are being held? or rather don't care 'bout those damn rules and just get as much money out of there as you can?" the teacher defines what's right, I damn sure wouldn't care about rules.
If I hadn't already given you a medal, I'd give you one for that.