NEET Botany Molecular Basis of Inheritance Questions Solved

BOARD

                                                        

(a) Identify the structure shown above.

(b) Redraw the structure as a replicating fork and label the parts.

(c) Write the source of energy for this replication and list the enzymes involed in this process.

(d) Mention the difference in this synthesis based on the polarity of two template strands.   (5 marks)

(a) This is the structure of a Replication Fork.

 

(b) Structure of replicating fork :

                                

 

(c) Replication is energetically a very expensive process. Deoxyribonucleosides are added in the

     form of Deoxyribonucleotide triphosphates. They have two functions :

    (i) They act as substrates.

   (ii) They provide energy for polymerisation reaction. The last two terminal phosphates in a 

         deoxynucleoside phosphate are high energy phosphates as in the case of ATP.

 

(d) 5'  3'-Continuous synthesis

     3'  5'-Discontinuous synthesis

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