Question

Which of the following mechanisms of gene regulation operates after mRNA transcription but before translation of mRNA into protein?
A. mRNA splicing
B. DNA packing
C. Repressors and activators
D. protein degradation

Answer 1

Hint: Transcription refers to the method of creating mRNA from a gene utilizing RNA polymerase, whilst translation is the method of producing a sequence of amino acids- a protein- using tRNA and rRNA. After transcription and before translation, introns are removed and exons are spliced together. Thus, mRNA splicing and editing occur after mRNA transcription but just before mRNA translation into protein.

Complete Step by Step Answer:
Transcription takes place in the nucleus of the cell; once the DNA has been replicated, the procedure of transcript formation begins. The process of protein formation takes place in the cytoplasm of the cell, particularly at the ribosome. Once the mRNA is created in the nucleus, it moves from the nucleus to the cytoplasm to the ribosome, where the whole translation process results in the formation of the polypeptide chain.
Before a gene can be translated into a protein, it must first be located and transcribed into the mRNA. Splicing is indeed the method of removing non-coding provinces named "introns" and leaving only the protein-coding "exons." In the cell, introns are eliminated by special enzymes that identify specific sequences as well as cut and rejoin the coding regions for protein translation. Therefore, mRNA splicing is the mechanism of gene regulation that operates after transcription but before the translation of mRNA into protein.
RNA processing occurs after transcription and before translation which involves mRNA splicing. The transcribed RNA is referred to as pre-mRNA. It is further processed to become mature RNA. Capping, polyadenylation, and splicing are all descriptions of RNA processing.
To fit the DNA molecules into the nucleus, they must be packed into chromatin, an extremely compressed and compact structure. This is called DNA packing.
Thus, the correct option is A

Note: Gene regulation can be classified into two types: positive and negative. Positive regulation is initiated by activators (and sometimes inducers), whereas negative regulation is initiated by repressors. Proteins can be produced from DNA and mRNA, but they can also be degraded through a process known as ubiquitination.