When a charged tRNA is about to bind to the vacant A site of a ribosome where is the growing polypeptide?
When a charged tRNA is about to bind to the vacant A site of a ribosome, where is the growing polypeptide? The polypeptide is equally likely to be in any of the three sites.
In what order does a charged tRNA move through the sites of a ribosome quizlet?
The tRNA binds with the A site, then is moved to the P site, then the E site as the ribosome shifts.
What is translation Where does it take place?
Translation occurs in a structure called the ribosome, which is a factory for the synthesis of proteins. The ribosome has a small and a large subunit and is a complex molecule composed of several ribosomal RNA molecules and a number of proteins.
What two places in the cell can translation occur?
In eukaryotes, transcription and translation take place in different cellular compartments: transcription takes place in the membrane-bounded nucleus, whereas translation takes place outside the nucleus in the cytoplasm. In prokaryotes, the two processes are closely coupled (Figure 28.15).
Where is tRNA formed?
In eukaryotes, the mature tRNA is generated in the nucleus, and then exported to the cytoplasm for charging. Processing of a pre-tRNA.: A typical pre-tRNA undergoing processing steps to generate a mature tRNA ready to have its cognate amino acid attached. Nucleotides that are cleaved away are shown in green.
Which amino acid would be attached to the 3 end of this tRNA?
At one end, the tRNA has an anticodon of 3′-UAC-5′, and it binds to a codon in an mRNA that has a sequence of 5′-AUG-3′ through complementary base pairing. The other end of the tRNA carries the amino acid methionine (Met), which is the the amino acid specified by the mRNA codon AUG.
Where does the mRNA go to at the end of transcription?
Where does the mRNA go after transcription? leaves the nucleus, goes to the cytoplasm, binds to a ribosome to be read.
What is the role of tRNA synthetase?
An aminoacyl-tRNA synthetase (aaRS or ARS), also called tRNA-ligase, is an enzyme that attaches the appropriate amino acid onto its corresponding tRNA. It does so by catalyzing the transesterification of a specific cognate amino acid or its precursor to one of all its compatible cognate tRNAs to form an aminoacyl-tRNA.
What does R stand for in rRNA?
What does the r in rRNA stand for? Initiation (transcription) DNA promoter signals the start and the RNA polymerase makes the new RNA, RNA polymerase binds to the DNA promoter in this process. Elongation (transcription)
Is rRNA translated?
Ribosomal RNA is non-coding and is never translated into proteins of any kind: rRNA is only transcribed from rDNA and then matured for use as a structural building block for ribosomes.
What is the difference between 16S rRNA and 18S rRNA?
The main difference between performing analyses with 18S rRNA gene data instead of 16S rRNA gene data (or ITS data) is the reference database used for OTU picking, the taxonomic assignments, and the template-based alignment building, since it must contain eukaryotic sequences.