Question

The direction of DNA replication is
A.From 5’ end towards 3’ end.
B.From 3’ end towards 5’ end
C.Amino terminus to carboxyl terminus.
D.Carboxy terminus to amino terminus.

Answer 1

Hint: DNA stands for deoxyribo nucleic acid. DNA is a hereditary material which passes from parents to their offsprings. DNA is composed of a polynucleotide chain that coils around each other to form a double helical structure. DNA consists of genetic information.

Complete answer:
DNA Replication:
1.DNA Replication is one of the processes of central dogma by which DNA makes a copy of itself.
2.It is a process by which two identical copies of DNA are made from one original copy of DNA.
3.DNA replication occurs in all living organisms.
4.DNA is composed of a double helix of two complementary strands.
5.During DNA replication, these two strands get separated.
Then each strand of the original DNA molecule serves as a template for the production of new copies of DNA.
6.This process is called semiconservative replication.
7.As the result of semiconservative replication each new DNA molecule consists of one strand of original DNA and the second strand is of newly synthesized DNA.
8.DNA replication begins at specific locations which are called the origin of replication in the genome.
9.DNA replication is done with the help of the enzyme DNA Polymerase.
The direction of DNA replication is from 5’end to the 3’ end.

Hence the correct answer is OPTION(A)

Note: DNA replication can also be performed in vitro i.e. artificially outside the cell. In this DNA polymerase which is isolated from a living cell and artificial DNA primers are used to start the DNA replication. Techniques by which artificially DNA replication can be performed include Polymerase Chain Reaction (PCR), Ligase Chain Reaction (LCR), Transcription mediated amplification (TMA).