Those children have been dragged up, not brought up! Definition from the Longman Dictionary of Contemporary English. Advanced Learner's Dictionary. Dictionary results for drag.hose children have been dragged up, not brought up! Definition from the Longman Dictionary of Contemporary English. Advanced Learner's Dictionary. Dictionary results for drag.
In the simplest sense, expressing a gene means manufacturing its corresponding protein, and this multilayered process has two major steps. In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription.n this situation, translation begins at the 5' end of the mRNA while the 3' end is still attached to DNA. In all types of cells, the ribosome is composed of two subunits: the large (50S) subunit and the small (30S) subunit (S, for svedberg unit, is a measure of sedimentation velocity and, therefore, mass).
In the first step, the information in DNA is transferred to a messenger () by way of a process called . During transcription, the DNA of a gene serves as a template for , and an called II catalyzes the formation of a pre-mRNA molecule, which is then processed to form mature mRNA (Figure 1). The resulting mRNA is a single-stranded copy of the gene, which next must be translated into a protein molecule. Figure 1: A gene is expressed through the processes of transcription and translation. During transcription, the enzyme RNA polymerase (green) uses DNA as a template to produce a pre-mRNA transcript (pink).