In 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).n 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.
Motor Trend. The 2014 Toyota RAV4 is quite fuel-efficient by most family-vehicle standards, although if you're comparing the RAV4's numbers to those of hybrid modelsâor even some with class-leading gas mileage, you're likely to wonder why Toyota isn't in the upper echelon, as it is with the Prius.xpert Quotes: Toyota RAV4: 24/31 mpg or 26 mpg combined (FWD); 22/29 mpg or 25 mpg combined (AWD). EPA. increases of one to three miles per gallon across the board. Autoblog. More importantly, fuel economy takes priority now.
$24,500-$30,700. While earlier models offered V6 and 4-cylinder engine options, the latest RAV4 is available only with a 176-hp 2.4-liter 4-cylinder mated to a 6-speed automatic. Fuel economy is rated at 24 miles per gallon city/31 mpg hwy with 2-wheel drive, or 22 mpg city/29 mpg hwy with optional all-wheel drive.he RAV4 matches the Santa Fe for interior space but gets better fuel economy. However, the Santa Fe has a much better standard warranty (10 years/100,000 miles vs. three years/36,000 miles). Subaru Outback -- The Outback is more wagonlike than the RAV4, and it offers the option of a 6-cylinder engine.