Which of the following do not occur during post transcriptional processing of RN

Question

Which of the following do not occur during post transcriptional processing of RNA in eukaryotes? A) the spliciny of introns B) addition of a poly A at the F end C) removal of introns D) addition of a? methyl guanosine cap at the 5' end E) Translation Which of the following is a testcross? A) AABB x AABB B) AaBb X AaBb C) AaBb x AABB D) aabb X AaBa Soldarla is in which phylum? A) Baisidiomyeota B) Ascomyota C) Bryophyta D) Zygomycota E) None of the above Structural aberrations in the chromosomes can be designated as all except A) Translocation B) Deletion C) Derivative D) Inversion E) Misnomer Which of the following do not occur during post transcriptional processing of RNA in eukaryotes A) the splicing of introns B) addition of a poly-A at the 3' end C) removal of introns D) addition of a 7-methyl guanosine cap at the 5' end Removal of introns from RNA is by A) Primosomes B) Peptidases C) Galactosidases D) Splicesomes

Explanation / Answer

10.Ans.E.Translation.

Translation is a process of RNA based Protein synthesis.

after the transcription process the Pre mRNA undergo Post-Transcriptional modifications and converts into matured mRNA. there are 3 major modification occurs to the mRNA - 1) capping - where base methyl guanine was added at the 5' end of the mRNA 2) splicing - where non coding sequences (Introns) are removed from mRNA and Coding sequences (Exons) are combined 3) Polyadenylation - where Adenine bases are added to the 3' end of the mRNA.

11.Ans.aabb × AaBb

testcross is usually performed to identify the organism is Homozygous Dominant or Heterozygous. for this we cross the unknown genotype is crossed with homozygous recessive and basing on phenotypic results we can predict the organism genotype.

13.Ans.E.Misnomer

the other options Translocation, inversion, deletion and derivative all are structural aberrations in the chromosome. Translocation is a chromosomal aberrations which is caused by rearrangement of segment of Chromosome between non homologous chromosomes. deletion is a portion of chromosome is deleted and inversion is a aberration where part of chromosome is broken and the same is turned up side down and reattached at the same place finally Derivative chromosome is a chromosome where one or more aberrations happen in a single chromosome.

14.Ans. No Answer

because all of the events occurs in Post-Transcriptional modification of RNA in Eukaryotes.

15.Ans. D.Splicesomes

Splicesome is complex of enzymes which involves in splicing process where introns (non-coding) sequences are removed from the mRNA and the remaining exons (Coding sequences) are combined together to form matured mRNA.

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