Which molecule contains ribose has its sugar?
where in the cell does DNA become RNA?
that doesnt answer the questiona t all
that doesnt answer the question at all
The molecule that contains ribose as its sugar is called ribonucleic acid, or RNA. It is a type of nucleic acid that plays a vital role in protein synthesis and gene expression.
Now, let's talk about where in the cell DNA becomes RNA. This process is known as transcription and it occurs in the nucleus of eukaryotic cells. In prokaryotic cells, which lack a nucleus, transcription takes place in the cytoplasm.
To further understand the process, here are the key steps:
1. Initiation: RNA polymerase, an enzyme responsible for transcription, binds to a specific DNA sequence called the promoter region, which signals the start of a gene.
2. Elongation: Once the RNA polymerase is bound, it starts to separate the DNA strands and synthesizes a complementary RNA molecule based on the DNA template. It adds nucleotides to the growing RNA chain, following the rules of base pairing (adenine with uracil in RNA).
3. Termination: Transcription continues until the RNA polymerase reaches a termination signal on the DNA template. This signal causes the RNA polymerase to detach from the DNA, releasing the newly synthesized RNA molecule.
After transcription, the RNA molecule undergoes further processing, such as the removal of introns (non-coding sequences) and the addition of a protective cap and a poly-A tail. In eukaryotic cells, this occurs in the nucleus before the RNA molecule is transported to the cytoplasm for various cellular processes.