Explain the dna structure in details, Biology

Assignment Help:

Explain the DNA structure in details?

Structure :  Each DNA molecule is a double stranded polymer, consisting of perhaps thousands or millions of linked nucleotides. The two long strands of DNA twist around the central axis to form a double helix. The structure of the double helix was elucidated using X-ray diffraction and model building by Watson and Crick, along with Rosalind Franklin, Maurice Wilkins and others.

2150_DNA.png

The model developed by this group, proposed in 1953, is called the central dogma of molecular biology, and is one of the most significant biological discoveries ever.

The two strands of DNA in the double helix are held together by hydrogen bonds between adjacent base pairs. These base pairs form what is sometimes referred to as the "rungs" of the DNA ladder, if the helix could be uncoiled. Adenine always bonds with thymine; guanine always bonds with cytosine.

1720_spiral.png

The amount of adenine in a cell, therefore, is always the same as that of thymine, and the amount of guanine the same as that of cytosine. Adenine and thymine form two hydrogen bonds between themselves; guanine and cytosine form three hydrogen bonds between themselves. Because of this bonding, each strand has a base sequence which is the exact complement of the sequence on the adjacent strands.


Related Discussions:- Explain the dna structure in details

Ascitic fluid collection - specimen collection, Pleural, Pericardial, and A...

Pleural, Pericardial, and Ascitic fluid Collection:      The procedure is called paracentesis . If for pleural cavity is called thoracocentesis , and for pericardial cavity c

What is the crystallization of a virus, Q. What is the crystallization of a...

Q. What is the crystallization of a virus? What is the significance of this process? Crystallization is the procedure of transformation of viral components into organized solid

Explain how inhibition might contribute, We now understand that mutations t...

We now understand that mutations that cause the inhibition of apoptosis are found in tumors. Because proliferation itself is not induced by the inhibition of apoptosis, explain how

Define myocardial infraction and stress testing, Q. Define Myocardial infra...

Q. Define Myocardial infraction and stress testing? Prediction of disease is one of the primary functions of stress testing. We would like to be able to predict in each patient

What is the function of the antidiuretic hormone, Q. What is the function o...

Q. What is the function of the antidiuretic hormone? Where it made and which is the stimuli that increase or reduce its secretion? The antidiuretic hormone is secreted by the h

Describe the terms – cilia, Cilia and flagella share a common structure, wi...

Cilia and flagella share a common structure, with a microtubular core which has a 9+2 organization with nine paired doublets of microtubules surrounding a central pair to form the

What is the ph inside the stomach, What is the pH inside the stomach? Why i...

What is the pH inside the stomach? Why is there a need to keep that pH level? How is it maintained? Which are the cells that produce that pH? The normal pH of the gastric juice

Why binding motifs regulate gene expression, How do leucine zipper binding ...

How do leucine zipper binding motifs regulate gene expression?

How pathogenic bacteria cause diseases, What are some mechanisms by which p...

What are some mechanisms by which pathogenic bacteria cause diseases? Why is this knowledge important? Pathogenic bacteria have characteristics called as virulence factors that

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd