What is the purpose of gene expression?

Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins, but in non-protein coding genes such as transfer RNA (tRNA) or small nuclear RNA (snRNA) genes, the product is a functional RNA.
A.

Why is it necessary to regulate gene expression?

Gene Expression. Genes encode proteins and proteins dictate cell function. Moreover, each step in the flow of information from DNA to RNA to protein provides the cell with a potential control point for self-regulating its functions by adjusting the amount and type of proteins it manufactures.
  • What causes protein synthesis to stop?

    When a ribosome reaches the codon UAG, UAA, or UGA on an mRNA strand then protein synthesis is terminated. A protein known as a release factor binds to the ribosome and adds a water molecule to the end of the amino acid chain.
  • How can Transcription be regulated?

    Transcription factors are proteins that bind to specific DNA sequences in order to regulate the expression of a given gene. The power of transcription factors resides in their ability to activate and/or repress wide repertoires of downstream target genes.
  • What is the first stage of gene expression?

    Transcription is the first stage of gene expression. The stretch of DNA that is transcribed is called the transcription unit.
B.

What does it mean to regulate gene expression?

Regulation of gene expression includes a wide range of mechanisms that are used by cells to increase or decrease the production of specific gene products (protein or RNA), and is informally termed gene regulation.
  • Why would a gene not be expressed?

    Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins, but in non-protein coding genes such as transfer RNA (tRNA) or small nuclear RNA (snRNA) genes, the product is a functional RNA.
  • How do transcription factors regulate gene expression?

    Transcription factors are proteins involved in the process of converting, or transcribing, DNA into RNA. Transcription factors include a wide number of proteins, excluding RNA polymerase, that initiate and regulate the transcription of genes. Regulation of transcription is the most common form of gene control.
  • How many genes does E coli contain?

    Genome Sizes
    Base pairsGenes
    E. coli K-124,639,2214,377
    E. coli O157:H75.44 x 1065,416
    Schizosaccharomyces pombe12,462,6374,929
    Agrobacterium tumefaciens4,674,0625,419
C.

What is the purpose of gene regulation?

Gene regulation is the informal term used to describe any mechanism used by a cell to increase or decrease the production of specific gene products (protein or RNA). Cells can modify their gene expression patterns to trigger developmental pathways, respond to environmental stimuli, or adapt to new food sources.
  • What is the definition of gene expression in biology?

    Gene expression is the process by which information from a gene is used in the synthesis of a functional gene product. These products are often proteins, but in non-protein coding genes such as ribosomal RNA (rRNA) genes or transfer RNA (tRNA) genes, the product is a functional RNA.
  • What is the purpose of gene regulation?

    Gene regulation is the informal term used to describe any mechanism used by a cell to increase or decrease the production of specific gene products (protein or RNA). Cells can modify their gene expression patterns to trigger developmental pathways, respond to environmental stimuli, or adapt to new food sources.
  • Why Gene expression is important?

    Gene Expression. Genes encode proteins and proteins dictate cell function. Moreover, each step in the flow of information from DNA to RNA to protein provides the cell with a potential control point for self-regulating its functions by adjusting the amount and type of proteins it manufactures.

Updated: 20th October 2018

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