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.
68. The majority of the elements in the Periodic Table are(1) metals (3) metalloids(2) nonmetals (4) noble gases69. Most of the groups in the Periodic Table of the Elementscontain(1) nonmetals, only (3) nonmetals and metals(2) metals, only (4) metals and metalloids70. Which of the following elements in Period 3 has thegreatest metallic character?(1) Ar (3) Mg(2) Si (4) S71.