What is gene expression and DNA replication?

Question

Ivy Acosta · Accepted Answer

Gene expression is the bio-process by which DNA is "transformed" into protein, whereas DNA replication is the bio-process by which the double-helix DNA system is duplicated.

Gene expression happens all the time, bearing mind protein, which are produced from gene expression, is present at all process within the human body. Gene expression is mainly divided into two process, but not the only ones: transcription and translation. The former happen in the middle-way, when the information from the DNA is replication in the mRNA strands, whereas the latter happen after we have the information copied, that is to say, mRNA is read out into proteins or alike.

DNA replication is a process that happen when DNA needs to be divided, for instance in cell replication, generally called mitosis, in general it is not present in meiosis.

See the schemes below. DNA replication is source of great errors, such as genes are reallocated, usually it does not cause significant demands to the whole system. Gene expression also is source of great errors, such as in splicing, a process by which the mRNA is "edited."

A video discussing gene expression and DNA replication

References

https://tutor.hix.ai accessed on 16 02 2016
https://tutor.hix.ai accessed on 16 02 2016

Daniel Allen · Answer

undefined Gene expression is the process by which information from a gene is used to synthesize functional gene products, such as proteins or non-coding RNA molecules. It involves two main stages: transcription, where the DNA sequence of a gene is copied into a messenger RNA (mRNA) molecule, and translation, where the mRNA is used as a template to assemble a specific amino acid sequence into a protein.

DNA replication is the process by which a cell duplicates its DNA before cell division. It involves unwinding the DNA double helix, separating the two strands, and using each strand as a template to synthesize a complementary strand, resulting in two identical DNA molecules. This process ensures that each daughter cell receives an exact copy of the genetic information during cell division.