Controlling the rates of transcription and translation is important in bacteria to avoid collisions between ribosomes and RNA polymerases. Calculate what the maximum rate of translation by a ribosome in a bacterial cell would have to be, in units of amino acids per second, so as not to overtake an RNA polymerase that is transcribing mRNA at a rate of 60 nucleotides per second.
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A ribosome translates mRNA into a protein by reading the mRNA sequence in groups of 3 nucleotides, called codons. Each codon corresponds to one amino acid. Show more…
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Controlling the rates of transcription and translation is important in bacteria to avoid collisions between ribosomes and RNA polymerases. Calculate the maximum rate of translation by a ribosome in a bacterial cell, provided in units of amino acids per second, so that the ribosome doesn't overtake an RNA polymerase that is transcribing mRNA at a rate of 60 nucleotides per second. How long would it take for this bacterial cell to translate an mRNA containing 1800 codons?
a. Controlling the rates of transcription and translation is important in bacteria to avoid collisions between ribosomes and RNA polymerases. Calculate what the maximum rate of translation by a ribosome in a bacterial cell would have to be, in units of amino acids per second, so as not to overtake an RNA polymerase that is transcribing mRNA at a rate of 60 nucleotides per second. b. How long would it take for this bacterial cell to translate an mRNA containing 1800 codons?
Jenny W.
In bacteria, the amount of a particular protein and its activity in the cell is highly regulated. Please select all of the ways that proteins can be controlled in a bacterial cell. There is more than one correct response. All correct responses must be selected to receive full credit! activators can sometimes bind directly to ribosomes to enhance translation promoter sequence determins which sigma factor binds and directs transcription a small RNA that is complimentary to an mRNA may alter the mRNA secondary structure to expose or hide the RBS a riboswitch may determine when transcription is terminated a protein may need to be modified (e.g. phosphorylated) to make it active repressors can sometimes bind directly to ribosomes to stall translation
Rabeya Z.
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