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Primers are small DNA sequences that are designed to start DNA replication in a laboratory technique called polymerase chain reaction, or PCR, to amplify certain segments of DNA. Forward and reverse primers differ in the direction in which they initiate the replication.


To apply paint primer, use a roller to paint 3-foot-square sections with V-shaped or W-shaped strokes. Use a primer that is tinted to a shade similar to the top coat to reduce the number of coats necessary to cover a wall.


Typically, when a car will move in reverse, but not in forward, the transmission is having issues. The reverse clutch in the transmission may have become dislodged.


The Internet is a huge network of computers that send messages and other data to each other. For the most part, it works using the same underlying infrastructure used for telephone voice calling.


The time it takes for primer to dry varies with different manufacturers, temperatures and humidity levels. Types of primers include oil based, latex, enamel and all purpose. Some are a combination of paint and primer. Latex primers typically take between 30 minutes to o...


Forward biasing is when voltage is applied across a P-N junction in the forward direction, according to About.com. A reverse bias does just as the name suggests, reversing the flow of the current through the diode.


Makeup primer is a product applied to the skin prior to other types of cosmetics to give better and longer-lasting coverage. Various types of primers, such as foundation primers, lip primers, eyelid primers and even mascara primers, target different areas of the face, b...