Biology Questions and Answers
- Why is the proximity
between ribosomes and amino
acids important for the protein
formation? What is the
enzyme that catalyzes that
reaction?
The proximity between ribosomes and
amino acids isenzyme that catalyzes important b the peptide bondecause the (^)
resides in ribosomes. As substrates of
these enzymes, amino bind to the enzyme activationacids need to centers.
The enzyme that catalyzesbond is the peptidyl transferase. the peptide
- Why do ribosomes move
along mRNA during
translation?
During translation thexposes two mRNA codons to e ribosome alwaysbe
translated When a peptide bond is made theby moving along the mRNA.
ribosome moves to expose the next
codon. This movitranslocation. (In the roughng is called ribosomal
endoplasmic reticulum ribosomes are
attached mRNA moleculoutside the memes rather moving throughbrane and (^)
them).
- How many of the same
proteins are made at the same
time by each ribosome in the
translation of one mRNA
molecule? How does
consecutive protein
production occur in
translation?
Ribosomdifferent proteins simultaneoes do not make severalusly. They (^)
make them one after another.
Along one single mRNA molecule
however many ribosoma real mass manufacturing es may movof the same ine (^)
protein. The unit made of many
ribosomes wmRNA moleculorking e is called pupon the samolysome.e
- An mRNA molecule
codifies only one type of
protein?
EukaryoticmRNA, i.e., each mRNA cells have monocistronic codifies only (^)
one polypeptide chain. Prokaryotes canpresent polycistronic mRNA.
At the end of the assembling acids into a polypeptide chain, thof aminoe
mRNA, by one of its terminal codons,
signals to the ribosompolypeptide is complete. The ribosome that the (^) e
then liberates the produced protein. In
prokaryotes ainformation for the beginning of thefter this conclusion the
synthesis of another may follow in the same mRNA.different protein
http://www.biology-questions-and-answers.com