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

What do adp and atp mean, Q. What do ADP and ATP mean? What are the functio...

Q. What do ADP and ATP mean? What are the functions of these molecules for the cellular energetic metabolism? ADP is an short form of adenosine diphosphate, two molecules of ph

Hardy desert shrubs, Hardy desert shrubs - having short stem, number of br...

Hardy desert shrubs - having short stem, number of branches and thick leaves. The animals of deserts are primarily arthropods, reptiles, birds and mammals. Large animals are unc

Explain the sources of microorganisms, Explain the Sources of Microorganism...

Explain the Sources of Microorganisms? Microorganisms are virtually present everywhere in nature including air, water and soil. The microbial flora is also associated with the

Saturated fatty acids required for dyslipidemia, Q. Saturated Fatty Acids r...

Q. Saturated Fatty Acids required for dyslipidemia? Saturated Fatty Acids (SFA): These are found mostly in animal fats as white marble-like solid at room temperature. Red meats

Tissue, what is the location of connective tissues in our body

what is the location of connective tissues in our body

What is phylum hemichordata, What is Phylum Hemichordata ? The name "he...

What is Phylum Hemichordata ? The name "hemi"; (meaning "half") provides a clue to these animals, which have some of the features of chordates, and some features that are chara

Explain reproduction rates variation in bacterial gene, Antibiotic resistan...

Antibiotic resistance is the result of natural selection mutations, the only source of new genetic information available for bacteria. Rapid reproduction rates variation in bacteri

Tricuspid stenosis-tricuspid valve disease, Tricuspid Stenosis :  Acquired...

Tricuspid Stenosis :  Acquired tricuspid stenosis is most often due to chronic rheumatic carditis. Rarely could it be due to right atrial tumors or carcinoid syndrome producing mi

Illustrate the metabolic processes of vitamin B, Illustrate metabolic proce...

Illustrate metabolic processes of vitamin B In the human and animal metabolism, they form a functional unit, since, as components of the various coenzymes, they are essential

Why do protease-supplying cells of the stomach, Q Why do protease-supplying...

Q Why do protease-supplying cells of the stomach and of the pancreas make only precursors of the active proteolytic enzymes? The stomach and the pancreas make zymogens of the p

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