Transcription

Determine the enzyme which catalyzes the synthesis of pre-mRNA

• RNA polymerase I

• RNA polymerase III

• DNA polymerase III

• RNA polymerase II

Determine the enzyme which catalyzes the synthesis of pre-rRNA

• RNA polymerase I

• RNA polymerase III

• DNA polymerase III

• RNA polymerase II

Determine the enzyme which catalyzes the synthesis of pre-tRNA

• RNA polymerase I

• RNA polymerase III

• DNA polymerase III

• RNA polymerase II

What is the stage of gradual extension of the growing chain of pre-RNA to the final size?

• initiation

• elongation

• termination

• processing

In eukaryotes, the mature mRNA is

• monocistronic

• deprived of 3’-untranslated site

• deprived of poly-A-tail

    

• polycistronic

What is the anticodon loop of tRNA?

• there are four nucleotide at the end of the site; to the most extreme of them (A) covalently attached amino acid

• it is a site which contains stop codons

• it is a site  with 7 nucleotides in the middle of the chain; three of them perform the function of the anti-codon which complementarily interacts with the corresponding codon in the mRNA chain

• in this structure, there are 4 double stranded and 5 single-stranded sites

Determine the fundamental difference between the synthesis of RNA and DNA synthesis:

• the asymmetry of the process

• the conservatism of the process

• lack of the need for RNA primer

• the synthesis of RNA requires primer

    After the mRNA cap, there is a 5’-untranslated region which it is a sequence of several tens of nucleotide. It is complementary to one part of the RNA, which is included in the small subunit of the ribosome. What is the functional role of this mRNA region?

• protect 5-end of mRNA from exonucleases

• it contains one of three stop codons

• it  functions for primary binding of mRNA to the ribosome

• it contains information about the amino acid sequence in the protein

What is the functional role of the coding region of mRNA?

• it regulates the lifetime of mRNA

• their vocation is to protect 5-end of mRNA from exonucleases

•   functions for primary binding of mRNA to the ribosome

• it contains information about the amino acid sequence in the protein

   What is the acceptor stem of tRNA?

• there are four nucleotide at the 3 end of the site; to the most extreme of them (A) covalently attached amino acid

• it contributes to the formation of a specific tertiary structure of tRNA

• it is a site which contains stop codons

• it is a site  with 7 nucleotides in the middle of the chain; three of them perform the function of the anti-codon which complementarily interacts with the corresponding codon in the mRNA chain