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2006-07-26 03:24:25 · 6 answers · asked by szshariff_05 1 in Science & Mathematics Biology

6 answers

In prokaryotes yes (there is no nucleus)

In eukaryotes both take place in the nucleus.

2006-07-26 03:44:29 · answer #1 · answered by bellerophon 6 · 0 0

This is for eukaryotes, or organisms with nuclei and membrane-bound organelles in their cells.

Synthesis of messenger RNA occurs in the nucleus of the eukaryote because the RNA polymerase needs to code mRNA from the DNA in the cell. It's like trying to photocopy a blueprint, you need to photocopy it where the blueprint is - in the control room.

Then the completed mRNA, after post-transcriptional modifications to get rid of all the rubbish genes, floats out of the nucleus into the cytoplasm. it goes to the rough endoplasmic reticulum, where a ribosome then binds to it and starts joining the amino acids to make proteins.

Synthesis of DNA is not really that complicated. In fact, all the DNA does is to first, replicate its chromosomes in the nucleus, then pull each set to the sides and split the cytoplasm.

2006-07-26 10:55:52 · answer #2 · answered by Anonymous · 0 0

Not in eukaryotes, transcription and replication take place in the nucleus of all eukaryotic cells. In the case of mitochondria, the mitochondrial genome is not localized in the nucleus, but is in the mitochondria, where it gets copied for mitochondrial replication. So while the mjitochondria are in the cytoplasm, they are membrane bound organelles and their DNA is not in the cytoplasm. Since prokaryotes have no membrane bound organelles, like the nucleus or endoplasmic reticulum, the synthesis of nucleic acids does occur in the "cytoplasm" of the organism.

2006-07-26 22:29:31 · answer #3 · answered by Gene Guy 5 · 0 0

In Nucleus:

Protein synthesis begins with the separation of a DNA molecule into two strands. In a process called transcription, a section of one strand acts as a template, or pattern, to produce a new strand called messenger RNA (mRNA).

In Cytoplasm:
The mRNA leaves the cell nucleus and attaches to the ribosomes, specialized cellular structures that are the sites of protein synthesis. Amino acids are carried to the ribosomes by another type of RNA, called transfer RNA (tRNA). In a process called translation, the amino acids are linked together in a particular sequence, dictated by the mRNA, to form a protein.

2006-07-26 10:32:24 · answer #4 · answered by Anonymous · 0 0

synthesis of DNA is in the nucleus,while RNA synthesis is in cytoplasm.

2006-07-26 10:52:36 · answer #5 · answered by scarface 2 · 0 0

not in the eukaryotes. this happens in the nucleus. in bacteria, it occurs in the cytoplasm technically, but in a defined area where the nuclear material is concentrated

2006-07-26 11:23:24 · answer #6 · answered by coquinegra 5 · 0 0

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