What is the purpose of the spliceosome? Selected Answer: Answers: A to remove in

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What is the purpose of the spliceosome? Selected Answer: Answers: A to remove introns from pre-mRNA B to join together 2 exons C. to transcribe mRNA D A and B only are true E A, B and C are all true DNA polymerase Selected Answer Answers: A. adds nucleotides to the 3' end of the primer B binds to the promoter region of a gene C. is an enzyme that makes an RNA copy of DNA D joins together Okazaki fragments on the lagging strand Translation is terminated Selected Answer: Answers: A when a tRNA synthetase enzyme stops translation of the protein B when a tRNA brings in the last amino acid in a protein C. when the ribosome reads the sequence AUG D when the ribosome reaches a stop codon Gene A and Gene B are next to each other on a bacterial chromosome. Gene A is transcribed from the strand of DNA that is drawn 5' to 3'. Selected Answer Answers A. Gene B will be transcribed from the same strand because the genes are next to one another B. Gene B will be transcribed from the same strand because one of the DNA strands is always the template for all genes and the other strand is the coding strand for all genes C. Gene B will be transcribed from the opposite strand as Gene A because transcription alternates back and forth between the 2 DNA strands D There is not enough information to answer this question

Explanation / Answer

Answer :

Question number 1 : The correct answer is A (To remove introns from pre-mRNA)

Explanation : Spliceosomes are the large protein complexes which bring about the splicing of introns during post transcriptional modifications of eukaryotic mRNA. The spliceosome is made up of specialized RNA-protein complexes, small nuclear ribonucleoproteins. Each snRNP contains one of a class of eukaryotic RNAs, 100 to 200 nucleotides long, known as small nuclear RNAs (snRNAs). Five snRNAs (U1, U2, U4, U5, and U6) involved in splicing reactions are generally found in abundance in eukaryotic nuclei.

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