The diagram below shows a double-stranded dna molecule (parental dna).

I am new with this. Please help I am new with this. Please help DNA replication

DNA replication is the mechanism by which DNA is copied. It is highly accurate in both bacteria and eukaryotes and requires a variety of DNA polymerases and other accessory proteins. In this tutorial you will learn how DNA is replicated and understand the roles of the proteins involved in the process. You will also learn how the sequence of a DNA molecule is determined using the dideoxynucleotide DNA sequencing method.

Part A – The mechanism of DNA replication
The diagram below shows a double-stranded DNA molecule (parental duplex).
Drag the correct labels to the appropriate locations in the diagram to show the composition of the daughter duplexes after one and two cycles of DNA replication. In the labels, the original parental DNA is blue and the DNA synthesized during replication is red.

Answer

media%2F638%2F63872dde-4b9d-4ee2-9c8a-a1

First Cycle = 1st Box ( 1st box in Left of 1st Row) Second Cycle = 3 rd Box (1st box in Left of 2 nd Row )
Reason : in 1 st cycle : the DNA strand unwinds and the replicated strand is RED on each Parental BLUE strand i.e .   1st Box ( 1st box in Left of 1st Row)
in 2nd Cycle : Both the Above strands are unwinded of which 2 are Parental BLUE strands and 2 Replicated strands. Now 2 nd replication Continues. So we find 2 Strands completely Replicated RED and 2 Strands with Parental BLUE and Replicated RED strands. i.e .   3 rd Box (1st box in Left of 2 nd Row )

The First cycle is represented as :
media%2F8d8%2F8d8fded3-745d-4c4f-8f9b-37

The Second cycle is represented as:
media%2F2bb%2F2bb4fc51-0275-487e-9652-4e

The mode of DNA replication is knwon as semi-conservative i.e. during each cycle of replication one strand remains the original parent strand whereas the other strand is a newly synthesised daughter strand. By this understanding we can expect the results for each cycle as shown above.

Leave a Comment