News. The invention of the Polymerase Chain Reaction (PCR) radically changed biology. The technique was considered so important that the Nobel Prize was awarded to its inventor, Kary Mullis, in 1993.Thanks to this technique, very small samples of DNA (from as little as a single cell) can be analyzed.ews. The invention of the Polymerase Chain Reaction (PCR) radically changed biology. The technique was considered so important that the Nobel Prize was awarded to its inventor, Kary Mullis, in 1993.
The smallest prime number, according to primality as defined by modern mathematicians, is 2. To be prime, a number must be divisible only by itself and 1. All other numbers are known as composites.
There is only one prime number between 91 and 100. All other blocks of ten have at least two prime numbers. The â3âs column has the most prime numbers between 1 and 100. Composite numbers. Numbers that arenât prime are a mix of colours. For example, 15 is 5Ã3 where 5 is blue and 3 is green, so 15 is half blue and half green. All multiples of 6 have to have orange (2) and green (3) in them. Any number ending in 4,6,8 or 0 isnât a prime number.