Winds and wind systems on the Earth. 1  Wind is formed by the flow of air in horizontal directions. In meteorological definitions the coming direction of the wind is called wind direction. 2  1 m/s = 3.60 km/hr = 2.24 mph = 1.94 knot.
The production of proteins involves two major steps: transcription and translation. Together, transcription and translation are known as gene expression. The process of transcription only involves two molecules: DNA and RNA. A DNA strand provides a template for the synthesis of a complementary RNA strand. This process is used to synthesize any type of RNA from a DNA template. Transcription of a gene produces a messenger RNA (mRNA) molecule.
Translation occurs at ribosomes which are made of rRNA (ribosomal) and protein (it seems 3 types of rRNA and about 60-70 proteins are needed; rRNA makes up half the weight). Ribosomes must be assembled from several subunits (which are identified by their density measured in Svedburg units, S).RNA is not unique to humans. rRNA is the primary constituent of ribosomesâthose organelles which convert the genetic code into proteins in all living things. Comparisons of rRNA gene sequences link all living things, even those as different as prokaryotic cells and humans, in the same family tree.