3. In bacterial mRNAs, the AUG start codon is distinguished from all other AUGs by which...

3. In bacterial mRNAs, the AUG start codon is distinguished from all other AUGs by which of the following mechanisms ?

a) Ribosomal subunits bind at the 5’ end of the mRNA and scan down to the first AUG, which always serves at the initiation codon in bacteria
b) It is recognized by a specific initiation factor
c) It is preceded by a ribosome binding site sequence that base pairs with 16S rRNA
d) The 80S ribosome specifically recognizes initiation codons in bacteria
e) None of the above.

Expert Solution

Answer: C. It is preceeded by a ribosomal binding site sequence that base pairs with 16S rRNA. This sequence in the prokaryotes is termed as kozak sequence and is present in the 5' untranslated region of the start codon.

gladiator answered 2 years ago

1) Translation of a typical prokaryotic gene is initiated at a single start codon (AUG). However,...

1) Translation of a typical prokaryotic gene is initiated at a single start codon (AUG). However, the 5’ untranslated region of a prokaryotic mRNA can contain multiple AUG triplets. Explain how the translation machinery recognizes the correct AUG codon and initiates translation specifically at the start codon of a polypeptide. Which event is involved in the initiation of transcription? a. The binding of helicase to the origin region of template DNA b. The binding of initiation factors to the start...

How could you isolate mRNAs from other RNAs in the cell?

What is schizophrenia? How is it diagnosed? How is schizophrenia distinguished from other disorders within the...

What is schizophrenia? How is it diagnosed? How is schizophrenia distinguished from other disorders within the schizophrenic spectrum?

Does AUG occur only at the start of a protein? How can a ribosome “know” which AUGs...

Does AUG occur only at the start of a protein? How can a ribosome “know” which AUGs represent start codons? What is the actual link between the amino acid and the mRNA molecule? (IOW=What are the “translating” tools that translate RNA language into amino acid(protein) language?hint#2=there are 64 of them)

How can an external audit engagement be distinguished from the following other engagements: a) Review engagement;...

How can an external audit engagement be distinguished from the following other engagements: a) Review engagement; b) Agreed-upon procedures; and c) Compilation

The codon in the DNA coding strand has the following sequence: 5' - TAC -3' Which...

The codon in the DNA coding strand has the following sequence: 5' - TAC -3' Which of the following codons (result of a mutation) represents a non-sense mutation? Select one: a. TAA b. TAT c. TTC d. TCC

Which four dimensions of value from the customer can be distinguished and how do they differ...

Which four dimensions of value from the customer can be distinguished and how do they differ from one another? (answer in bullet point summary)

Isolated naked bacterial DNA from which proteins are removed is supercoiled. DNA in bacterial chromosomes is...

Isolated naked bacterial DNA from which proteins are removed is supercoiled. DNA in bacterial chromosomes is also supercoiled. When naked DNA is nicked, supercoiling is abolished. In contrast nickling chromosomal DNA does not abolish supercoiling. Why?

3- What element/s that make/s behavioral theories of leadership distinguished from trait theories.

Section 29.1 A.) What distinguishes craniates from all other chordates? What distinguishes vertebrates from all other...

Section 29.1 A.) What distinguishes craniates from all other chordates? What distinguishes vertebrates from all other craniates? B.) Describe the invertebrate clade of chordates, Cephalochordata. Make sure to mention the defining trait. How do they obtain their nutrients? How do they reproduce? C.) Describe the invertebrate clade of chordates, Urochordata. Make sure to mention the defining trait. How do they obtain their nutrients? How do they reproduce? D.) Describe the difference between agnathans and gnathostomes. Give an example of each.

Question