THE POLYMERASE CHAIN REACTION (PCR) OBTECTIVE: To amplify a region of ribosomal DNA from a small amount of genomic DNA. INTRODUCTION: The polymerase chain reaction (PCR) was developed in 1983 by Kary Mullis, a nucleic acids chemist (then at Cetus).HE POLYMERASE CHAIN REACTION (PCR) OBTECTIVE: To amplify a region of ribosomal DNA from a small amount of genomic DNA. INTRODUCTION: The polymerase chain reaction (PCR) was developed in 1983 by Kary Mullis, a nucleic acids chemist (then at Cetus).
The elements on the periodic table are divided in three categories which are metals, non-metals and metalloids. Metals and nonmetals are two categories that are used to classiâ¦fy  the elements in the periodic table. The third is inert gases. 7 people found this useful.
Types of Matter. Matter can be classified under 2 types, matter that is a pure substance and matter that is a mixture of more than one pure substance. From this basic difference we can classify matter even further. There are two types of pure substances: 1) Element-A substance that cannot be seperated into simpler substances. If a substance has only one type of element from the periodic table in it, it is classified as an element. Example: Aluminum. 2) Compound-Two or more elements combined.