Transcription, Translation, Termination Splicing and Addition of Cap and Poly A

ID: 300050 • Letter: T

Question

Transcription, Translation, Termination Splicing and Addition of Cap and Poly A Nuclear Export Choose right sequence of events from the choices below: 1, 2, 3, 4, 5 5, 4, 3, 2, 1 1, 4, 5, 3, 2 3, 4, 5, 2 Chloramphenicol inhibits protein synthesis by Blocks binding of aminoacyl-tRNA to A-site of ribosome. Blocks initiation of RNA chains. Blocks translocation Prevents peptidyl transferase reaction on ribosome. Prevents binding of mRNA to ribosome. Tetracycline inhibits protein synthesis by Blocks binding of aminoacyl-tRNA to A-site of ribosome. Blocks initiation of RNA chains. Blocks translocation. Prevents peptidyl transferase reaction on ribosome. Prevents peptidyl transferase reaction on ribosome. Prevents binding of mRNA ribosome The 55 rRNA gene is synthesized by RNA polymerase I RNA polymerase II RNA polymerase III a) and b) In an analysis of the nucleotide composition of DNA, which of the following is true? A= G and C= T A + C = G + T A = C A + T = G + C Both B and Care true Non-Homologous recombination is mainly involved in Replication Transcription Gene regulation Repair

Explanation / Answer

Question

Answer

Explanation

(27)

a) 1,2,3,4,5

First the transcription produces mRNA from DNA, then mRNA undergoes maturation through splicing and addition of 5' CAP and poly A tail at the 3' end. Finally the mRNA will leave for cytoplasm for translation.

(28) Choloramphenicol inhibit protein synthesis by

(D) prevents peptidyl transferase reaction on ribosome

This antibiotics binds peptidyl transferase component of 50S ribosome and thus successfully blocks the peptide elongation. There will not be any formation of peptide bonds in the presence of chloramphenicol.

(29) Tetracyclin inhibits protein synthesis by

A)Blocks binding of aminoacyl t-RNA to A-site of ribosome

It inhibits bacterial protein synthesis and this is done by preventing the association of bacterial ribosome with the aminoacyl-tRNA

(30) The 5S rRNA gene is synthesized by

Eukaryotic 5S rRNA is synthesized by RNA polymerase III and eukaryotic rRNAs are synthesized by RNA polymerase I.

(31)

D) A+T=G+C

The sum of the adenine plus thymine bases to the sum of the guanine plus cytosine bases in a DNA will be maintained to facilitate the base pairing between adenine and guanine; cytosine and thymine.

32) Non homologous recombination is mainly involved in

A) Replication

During replication only we can observe Non homologous recombinatio