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Were are mRNA , tRNA, and rRNA made in?
Rna q
- Thread starter adrakdavra
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The nucleolus.
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Campbell only has like one section on the nucleolus, and it says that it only directs Ribosome RNA production and ribosome assembly.
"A prominent structure within the nondividing nucleus is
the nucleolus (plural, nucleoli), which appears through the
electron microscope as a mass of densely stained granules and
fibers adjoining part of the chromatin. Here a type of RNA
called ribosomal RNA (rRNA) is synthesized from instructions
in the DNA. Also in the nucleolus, proteins imported from
the cytoplasm are assembled with rRNA into large and small
subunits of ribosomes. These subunits then exit the nucleus
through the nuclear pores to the cytoplasm, where a large and
a small subunit can assemble into a ribosome. Sometimes
there are two or more nucleoli; the number depends on the
species and the stage in the cell's reproductive cycle."
I'll check with a TA at my school though, since they may have just been a little vague here, but I think that mRNA and tRNA are made in the "nucleus" and not specifically the nucleolus".
"A prominent structure within the nondividing nucleus is
the nucleolus (plural, nucleoli), which appears through the
electron microscope as a mass of densely stained granules and
fibers adjoining part of the chromatin. Here a type of RNA
called ribosomal RNA (rRNA) is synthesized from instructions
in the DNA. Also in the nucleolus, proteins imported from
the cytoplasm are assembled with rRNA into large and small
subunits of ribosomes. These subunits then exit the nucleus
through the nuclear pores to the cytoplasm, where a large and
a small subunit can assemble into a ribosome. Sometimes
there are two or more nucleoli; the number depends on the
species and the stage in the cell's reproductive cycle."
I'll check with a TA at my school though, since they may have just been a little vague here, but I think that mRNA and tRNA are made in the "nucleus" and not specifically the nucleolus".
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Yes. rRNA is made in the nucleolus, which also helps assemble ribosomes. The rest should be made in just the nucleus
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I think mRNA is just made in the nucleus not the nucleolus because it is transcribed from DNA which is in the nucleus. tRNA and rRNA might be made in the nucleolus though. Please let me know if I am right.
Thank you,
Verónica
Thank you,
Verónica
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