When a DNA molecule replicated what is the relationship between the original strand and newly formed strands of DNA?

Answer 1

The strands of DNA "unzip" during their replication, and enzymes read over a side of the exposed strand. This enzyme prints out a replicate called a mRNA, that is sent out of the nucleus, to the cytoplasm where the RNA Replication takes place. That mRNA is exactly opposite the original DNA. For example, A bonds to T and C to G, so replication would look like this:

If this was the original strand (on the left)

then the mRNA would look like this (on the right)

A- -T

T- -A

C- -G

C- -G

A- -T

Answer 2

the two polynucleotide strands of a DNA molecule unwinds at one end.it unzips like a zipper. now the nitrogenous bases of each strand of DNA are exposed and attract the nitrogenous bases of nucleotides present in the nucleoplasm.the enzyme called polymerase binds the nucleotides to the parent strand. it is called the semi conservative process because the new molecule consists of on old,one new strand and its the reason of relation of new and old strands of DNA molecule.......

Answer 3

First, here is the process of DNA replication (summarized).

1. The DNA is separated into two strands.

2. Complementary nucleotides are attached according to the base pair sequence, and subsequently two new strands of DNA are formed.

A DNA strand is made up of hundreds of thousands of nucleotides put together.

A

nucleotide

is a type of molecule (organic molecule, to be specific) that is

made up of a phosphate, a sugar, and a nitrogen base

. In all DNA nucleotides, there is always the same phosphate and sugar. But the nitrogen bases differ. There are

four nitrogen bases in DNA--Adenine, Guanine, Cytosine, and Thymine.

There are four nucleotide 'types' and the way we differentiate from the different ‘types’ is by looking at which DNA nitrogen base is in the nucleotide. The four DNA bases that all living things use are Adenine, Guanine, Cytosine, and Thymine.

So there are Adenine nucleotides, Guan

ine nucleotides, Cytosine nucleotides, and Thymine nucleotides. The c

ombination of the A, G, C, and T nucleotides make up the DNA code

. You string them together to make a sequence of nucleotides--and that makes up one strand of DNA.

Since DNA is a double stranded nucleic acid, there are

two

strands of DNA, meaning one strand of DNA is beside another strand, which is ‘stuck together’ because of hydrogen bonds.

But

two DNA strandscan’t just randomly mash together

to make a working strand of DNA--

they have to

match

, like a puzzle.

The four nucleotides are paired up so that if on one strand of DNA, there is a ‘[insert nucleotide type here]’ nucleotide, then on the other side/strand will always be the pair. This is called the base pairing rules. In DNA,

Adenine always pairs with Thymine

, and

Guanine always pairs with Cytosine

. Whenever you see Adenine in a strand of DNA, you are guaranteed to have Thymine as the complementary nucleotide, as the pair, on the other strand. Same with Guanine and Cytosine.

So basically, if you have a random strand of DNA, and you only know the sequence of one side of the DNA fragment, then you can figure out the sequence of the other strand, the other side of the DNA.

Say you have a piece of DNA, and you only know one side. The DNA sequence of one strand/side of the DNA is

ATTGCA

. Then you know that the other side must be

TAACGT

, because you know that Adenine pairs with Thymine, Guanine pairs with Cytosine, and vice versa. And what’s amazing is that this is universal. Every single living thing, from those tiny, nearly invisible bacteria--all the way to us humans--we all use thesame four DNA nucleotide bases!

So why I am I telling you this?

Well, to answer your question (finally), the relationship between the original strand and the newly formed strand...

Let’s see.

(1) You know that in any given DNA molecule, one strand of DNA is from the parent (used as the ‘template’ so that natural processes can figure out and attach the complementary nucleotides via the base pairing rules), and the other strand of DNA is newly formed.

[DNA replication is a semi-conservative process.]
(2) You know that in any given DNA molecule, one strand is complementary to the other strand.

So quite simply, the original strand of DNA is

COMPLEMENTARY

to the new strand of DNA. Together, they make up the double stranded DNA molecule!

Answer 4

When a DNA molecule has replicated, the old and new molecules each have one strand composed of new DNA nucleotides and one strand of the old DNA nucleotides. This type of replication is called semi-conservative, because each molecule gets one copy of the new DNA and one copy of the old DNA.