Question

QUESTION 3 Transposable elements can Ca. alter transcription of a gene. Cb. cause a mutation C.Cause gene duplication Cd. All of the above Ce. None of the above QUESTION 4 Exons are Ca.spliced to the original transcript. b. spliced together from the original transcript. Ce spliced to introns to form the final transcript. Cd. much larger than introns. Ce larger than the original coding region forming a sort of "molecular chamber of doom." QUESTIONS Ubiquitin forms a complex with proteins and then binds with Ca. the extracellular space b. mitochondria c. the proteasome Cd. the Golgi apparatus QUESTION 6 Mature mRNA can be edited by Ca. the additiori of new nucleotides. b.alternative splicing cc. the attachment of ubiquitin. d. intron removal

Answer 1

Question 3: All of the above.

Transposable elements often get inserted in the DNA leading to mutations leading to gene duplication and altering transcription of the gene.

Question 4: Exons are spliced together from the original transcript.

Original transcript contains exons and introns. During post-transcriptional modifications, introns are removed and exons spliced together to form mature transcript.

Question 5: Proteasome.

Ubiquitinated proteins bind to the proteasome to form molecular chamber of doom leading to proteasomal degradation of ubiquitinated proteins.

Question 6: Alternative splicing.

Mature mRNA can be edited by alternative splicing which involves skipping one or few exons thereby producing different proteins from a same gene.