Question

Hello! I am working on this genetics problem and was wondering if these two answers would make sense. Thank you for the help!

Question 1 (1 point) Saved Why can bacteria have poly-cistronic genes? Because they need multiple cistron organelles so they segregate evenly during cell division. Because they have many exons that are joined together before translation Because ribosomes can be loaded at multiple Shine Delgano/AUG sequences. Because ribosomes are loaded at the single CAP site. Because the stability conferred by a poly-A tail is very limited. Because ribosomes limited by the number and placement of AUG sites. Because transcripts are limited by the number of promoter sites. Because ribosomes are loaded at multiple CAP sequences. Because ribosomes do not exit the mRNA at termination codons. Because the Polly aannaa principle (Watson and Crick, 1960) states that transcription is optimistic. (the best answer. you think?) Question 21 point) Sived What are the minimum sequences necessary for translation in bacteria? cap, start codon, stop codon. enhancers, silencers, operator, promoter, polyadenylation signal 5 prime end of RNA. GU splice site, branch point-A. AG isplice site, polyadenylation signal. repressors, activators. cap. start codon, stop.codon promoters. GU splice site branch point-A AG-splice site, polyadenylation Signal enhancers, silencers, promoters, polyadenylation signal repressors, activators. attenuators Shine Dalgarno sequence, start codon, stop codon activator binding site, promoter operator, termination site Shine-Dalgarno sequence, start codon stop codon attenuator sequence start codon stop codon

Answer 1

1) polycistronic mRNAs are found in the prokaryotes.

polycistronic mRNAs are translated to produce multiple proteins, that is a single mRNA has multiple genes which code for different proteins, ORF for each protein is preceded by a Ribosome binding sites each gene can be translated differently.

mRNA in the prokaryotes do not have poly-A tail or 5` Cap.

so the answer is Because ribosomes can be loaded at multiple shine-Dalgarno/AUG sequences.

2) minimums sequences in the mRNA to be translated are ribosome binding site, that is the Shine-Dalgarno sequence, start codon and stop codon.

prokaryotes do not have introns, so there is no splicing, there are no 5` Cap and poly-A tail.

sequences which are required in the mRNA to be translated are

Shine-Dalgarno sequence- for the ribosome to bind.

start codon- for translation to begin

stop codon- where translation stops.

so the answer is Shine-Dalgarno sequence, start codon, stop codon.