The following is a sample primary RNA transcript. What must first occur before it can be translated? Exon 1 - Intron 1 - Intron 2 - Exon 2 - Intron 3 i) Exons need to be removed ii) Introns need to be removed iii) Poly A tail needs to be added to the 3' end iv) Poly A tail needs to be added to the 5' end v) 5' cap needs to be added O i, i, iv O i, iv, v ii, iii, v O ii, v

Which of the following is not a reason that gene transcription is selective (occurs on specific segments of DNA)?Group of answer choices a) in eukaryotes, transcribed mRNA is processed to add a poly-A tail b) sigma factors direct RNA polymerase where to bind the DNA template c) promoters differ from gene to gene

RNA polymerases Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a) need a primer a b b) synthesize RNA 5' to 3' c) never make any mistakes C d) none of the above

At the DNA level, a mutation in a promoter region where six nucleotides are added. a) substitution O b) insertion O c) in frame insertion O d) frameshift O e) B or C

Which of the following statements most accurately describes the action of the enzyme RNA polymerase?Select one  1.) RNA polymerase will transcribe only the exons by skipping over the introns within a eukaryotic gene sequence 2.) RNA polymerase will transcribe both DNA strands, moving in the 3' to 5' direction for one strand and 5' to 3' on the other 3.) RNA polymerase will transcribe both DNA strands, but only one RNA molecule will be used during translation 4.)None of the statements accurately describe the function of RNA polymerase

There may be more than one answer for each  Expression of mRNA can be regulated by which of the following? a.) RNA interference b.) presence of vectors c.) antisense RNA d.) blocking of poly(A)polymerase   Which of the following occur during processing of pre-mRNA? a.) removal of exons b.) removal of noncoding sequences c.) addition of 5’ cap structure d.) addition of poly-A tail

The diagram, shown in attatched image, shows an mRNA that is alternatively spliced. The alternatively spliced variant contains Exon 1, Exon 2, and Exon 4. Indicate below if a splice site is used, blocked by a modifying protein such that the spliceosome must choose a different site, or skipped to make this alternatively spliced variant.

A mutation in a/ an _____ sequence of a gene would be associated with loss of detectable mRNA from that unit. A) promoter B) exon C) intron D) splice site E) terminator