CENTRAL DOGMA :: PART 2

TYPES OF RNA

-          mRNA: - (messenger RNA) This is an intermediate formed between DNA and    
                 protein. mRNA is made from DNA and proteins are made from mRNA.

                     

-          tRNA: - (transfer RNA) this RNA helps in the formation of a protein from amino
                acids. This gathers amino acid and joins them making a polypeptide.

                                             

-          rRNA: - (ribosomal RNA) it is the main constituent of ribosomes. This along with
                 the two other RNA make a polypeptide.

CENTRAL DOGMA :: PART 1

INTRODUCTION

-          In any organism proteins perform most of the activities and DNA control all the cellular functions.

-          The process by which a protein is made from DNA is called central dogma.

-          This is a multilevel process which includes complex mechanism like transcription, translation, post translational modifications and many more.

-          The end product of this process is a protein that is able to perform all cellular activity.

                                

DNA REPLICATION :: PART 7

                      

DNA REPLICATION:: PART 6

-         Primase: - This removes the RNA primer that initiates the
                       synthesis of the DNA strand.

                                          

-         

        DNA ligase: - This enzyme seals the nicks formed by making
                               phosphodiester bonds.

                                             

DNA REPLICATION:: PART 5

-         DNA polymerase: - This enzyme is responsible for the synthesis of
                                   new strand of DNA.

o   DNA polymerase can synthesise DNA strand only in 5’ to 3’ direction.

                          

o   This requires the presence of (dNTP) deoxyribonucleotide triphosphate.