Post-Transcriptional Modifications

Spliceosomes are not found in cells of

• Plants

• Fungi

• Animals

• Bacteria

Poly A tail is present in

• mRNA of bacteria

• tRNA of eukaryotes

• Promotor of bacteria

• mRNA of eukaryotes

Splicing is one of the steps of post-transcriptional modifications which occurs in

• nucleus

• Cytoplasm

• ER

• Ribosomes

Assertion: Eukaryotic mRNA requires post-transcription processing for formation of functional mRNA.

Reason: Eukaryotic transcripts possess extra nonfunctional segments called introns.

• Both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

• Both Assertion and Reason are true but the C Reason is not the correct explanation of the Assertion.

• Assertion is true but Reason is false.

• Both Assertion and Reason are false

Which amongst the following does tailoring of hnRNA?

• Introns

• SnRNPs

• 18S rRNA

• Exons

In eukaryotes, the capping and tailing in hnRNA occurs at

• 3’ and 5’ end respectively

• 5’ and 3’ end respectively

• At any end

• Both occurs at 3’ end always

Methyl guanosine triphosphate is added to the 5' end of hnRNA in a process of

• splicing

• capping

• tailing

• none of these.

In tailing, adenylate residues are added at 3’ end

• With the help of guanyl transferase

• In a template independent manner

• With the help of methyl transferase

• Of hn-RNA of E. coli

Splicing, Capping and tailing of hn RNA forms:

• m RNA

• r RNA

• t RNA

• All the above