Answer
Verified
439.8k+ views
Hint: DNA replication is a process in which DNA strands get replicated into four DNA strands. This process is different in both eukaryotes and prokaryotes. Different proteins and enzymes are required for the completion of the process.
Complete answer:
Let’s discuss DNA replication in prokaryotes. To initiate unwinding of the double helix of DNA, some proteins bind to the origin of replication and start the process. After this an RNA primer comes and joins the origin of replication and DNA polymerase starts the process of replication.
Both strands of DNA act as template strands for the formation of replicated DNA strands. A replication site is called a replication fork. Which moves ahead as replication proceeds. Here is a diagram of DNA replication in E. coli.
Single strand binding proteins, topoisomerase and helicase enzymes help in keeping replication forks open. DNA polymerase can synthesize only in one direction, that is, 5’-> 3’ direction. Thus, one strand is synthesised continuously, called as leading strand and another strand is synthesised in fragments called as Okazaki fragments, and this strand is known as lagging strand.
Thus, we can conclude that Polymerisation of DNA nucleotides during the synthesis of lagging strand occurs in 5’-> 3’ direction. And option ‘B’ is the correct answer.
Note: DNA replication occurs to double the genetic material whenever required for cell division. It is a process in which firstly, double stranded DNA opens up from the origin of replication (ori). Origin of replication in prokaryotes is only one and in eukaryotes multiple origins of replications are present.
Complete answer:
Let’s discuss DNA replication in prokaryotes. To initiate unwinding of the double helix of DNA, some proteins bind to the origin of replication and start the process. After this an RNA primer comes and joins the origin of replication and DNA polymerase starts the process of replication.
Both strands of DNA act as template strands for the formation of replicated DNA strands. A replication site is called a replication fork. Which moves ahead as replication proceeds. Here is a diagram of DNA replication in E. coli.
Single strand binding proteins, topoisomerase and helicase enzymes help in keeping replication forks open. DNA polymerase can synthesize only in one direction, that is, 5’-> 3’ direction. Thus, one strand is synthesised continuously, called as leading strand and another strand is synthesised in fragments called as Okazaki fragments, and this strand is known as lagging strand.
Thus, we can conclude that Polymerisation of DNA nucleotides during the synthesis of lagging strand occurs in 5’-> 3’ direction. And option ‘B’ is the correct answer.
Note: DNA replication occurs to double the genetic material whenever required for cell division. It is a process in which firstly, double stranded DNA opens up from the origin of replication (ori). Origin of replication in prokaryotes is only one and in eukaryotes multiple origins of replications are present.
Recently Updated Pages
How many sigma and pi bonds are present in HCequiv class 11 chemistry CBSE
Mark and label the given geoinformation on the outline class 11 social science CBSE
When people say No pun intended what does that mea class 8 english CBSE
Name the states which share their boundary with Indias class 9 social science CBSE
Give an account of the Northern Plains of India class 9 social science CBSE
Change the following sentences into negative and interrogative class 10 english CBSE
Trending doubts
Which are the Top 10 Largest Countries of the World?
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Fill the blanks with the suitable prepositions 1 The class 9 english CBSE
Difference Between Plant Cell and Animal Cell
Give 10 examples for herbs , shrubs , climbers , creepers
Differentiate between homogeneous and heterogeneous class 12 chemistry CBSE
The Equation xxx + 2 is Satisfied when x is Equal to Class 10 Maths
How do you graph the function fx 4x class 9 maths CBSE
Write a letter to the principal requesting him to grant class 10 english CBSE