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ANSWER:
the small subunit of the ribosome recognizes and attaches to the 5' cap of mRNA
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This answer bellow, appears all over the internet, but its wrong. I just took a quiz.
-base pairing of activated methionine-tRNA to AUG of the messenger.
What else can I help you with?
What are the differences in the process of translation between prokaryotes and eukaryotes?
In prokaryotes, translation occurs in the cytoplasm and can start before transcription is complete. In eukaryotes, translation occurs in the cytoplasm but the mRNA must first be processed and transported out of the nucleus before translation can begin. Additionally, eukaryotic ribosomes are larger and more complex than prokaryotic ribosomes.
What feature was not present in the first eukaryotes?
Mitochondria, which are thought to have originated from bacterial endosymbionts, were not present in the first eukaryotes. These early eukaryotes were likely single-celled organisms that lacked many of the organelles found in modern eukaryotic cells.
What event is thought to have contributed to the evolution of eukaryotes?
Endosymbiosis is thought to have contributed to the evolution of eukaryotes. This process involved one prokaryotic cell engulfing another prokaryotic cell, leading to a symbiotic relationship that eventually gave rise to mitochondria and chloroplasts in eukaryotic cells. This event allowed for the development of more complex cellular structures and functions in eukaryotes.
What happens at a start codon?
At a start codon, such as AUG, the process of translation begins. The ribosome recognizes the start codon and initiates the assembly of the amino acids into a protein chain. tRNA molecules bring the corresponding amino acids to the ribosome to start the translation process.
Transcription and translation can be coupled in prokaryotes but not in eukaryotes justify the staement?
The transcription in eukaryotes, a much more complex process than in prokaryotes. 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. Indeed, the translation of bacterial mRNA begins while the transcript is still being synthesized. The spatial and temporal separation of transcription and translation enables eukaryotes to regulate gene expression in much more intricate ways, contributing to the richness of eukaryotic form and function.A second major difference between prokaryotes and eukaryotes is the extent of RNA processing. Although both prokaryotes and eukaryotes modify tRNA and rRNA, eukaryotes very extensively process nascent RNA destined to become mRNA. Primary transcripts (pre-mRNA molecules), the products of RNA polymerase action, acquire a cap at their 5′ ends and a poly(A) tail at their 3′ ends. Most importantly, nearly all mRNA precursors in higher eukaryotes are spliced. Introns are precisely excised from primary transcripts, and exons are joined to form mature mRNAs with continuous messages. Some mRNAs are only a tenth the size of their precursors, which can be as large as 30 kb or more. The pattern of splicing can be regulated in the course of development to generate variations on a theme, such as membrane-bound and secreted forms of antibody molecules. Alternative splicing enlarges the repertoire of proteins in eukaryotes and is a clear illustration of why the proteome is more complex than the genome.
What are the differences in the process of translation between prokaryotes and eukaryotes?
In prokaryotes, translation occurs in the cytoplasm and can start before transcription is complete. In eukaryotes, translation occurs in the cytoplasm but the mRNA must first be processed and transported out of the nucleus before translation can begin. Additionally, eukaryotic ribosomes are larger and more complex than prokaryotic ribosomes.
What is the Luhya translation of event organizer?
The Luhya translation of the English words 'event organizer' is "Omupanji".
What feature was not present in the first eukaryotes?
Mitochondria, which are thought to have originated from bacterial endosymbionts, were not present in the first eukaryotes. These early eukaryotes were likely single-celled organisms that lacked many of the organelles found in modern eukaryotic cells.
Which came first Eukaryotes or oxygen Accumulation in the Atmosphere?
Oxygen accumulation in the atmosphere came before Eukaryotes. Around 2.4 billion years ago, photosynthetic bacteria began to produce oxygen as a byproduct of photosynthesis, leading to the Great Oxidation Event. Eukaryotes, which possess specialized organelles like mitochondria that utilize oxygen for energy production, evolved around 2 billion years ago.
What event is thought to have contributed to the evolution of eukaryotes?
Endosymbiosis is thought to have contributed to the evolution of eukaryotes. This process involved one prokaryotic cell engulfing another prokaryotic cell, leading to a symbiotic relationship that eventually gave rise to mitochondria and chloroplasts in eukaryotic cells. This event allowed for the development of more complex cellular structures and functions in eukaryotes.
What comes between first eukaryotes and first terrestrial eukaryotes on a timeline?
The first eukaryotes were unicellular organisms that evolved around 2 billion years ago, followed by the first terrestrial eukaryotes that emerged around 1.6 billion years ago. Between these events, there were significant biological and environmental changes, including the development of multicellularity and adaptations for life on land.
Why methionine is n formylated in prokaryotes but not in eukaryotes?
Methionine is formylated in prokaryotes to signal the start of translation at the ribosome. This formylation is absent in eukaryotes because they use a different mechanism, relying on the recognition of the 5' cap structure on mRNA to initiate translation instead.
Why is protein synthesis different in prokaryotes and eukaryotes?
In prokaryotes, DNA is stored in the cytoplasm. also prokaryotes have no nucleus In prokaryotes, transcription and translation happen at the same time.
Why is protein synthesis different in pakaryotes and eukaryotes?
Protein synthesis differs in prokaryotes and eukaryotes primarily due to cellular structure and compartmentalization. In prokaryotes, transcription and translation occur simultaneously in the cytoplasm since they lack a defined nucleus. In contrast, eukaryotes have a nucleus where transcription occurs, followed by RNA processing before translation takes place in the cytoplasm. Additionally, eukaryotic mRNA undergoes modifications like capping and polyadenylation, which are not present in prokaryotic mRNA.
When does translation end in eukaroytes?
Translation in eukaryotes ends when a stop codon (UAA, UAG, or UGA) is encountered by the ribosome. This signals the termination of protein synthesis and the release of the newly formed polypeptide chain from the ribosome.
Why is protein synthesis different in prokatyke and euroaytes?
Prokaryotes do not have a distinct nucleus, so transcription and translation both occur in the cytoplasm simultaneously. In eukaryotes, transcription occurs in the nucleus while translation occurs in the cytoplasm, separated by nuclear envelope. Furthermore, eukaryotes have additional complexity due to post-transcriptional modifications and protein processing that prokaryotes lack.
When did eukaryotes first appeared?
1.8 billion years ago.
