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

Planning of diabetes counselling, Q. Planning of diabetes counselling? ...

Q. Planning of diabetes counselling? You have helped the client to find out various solutions to a problem and understand the coping skills, ensured support from the family  su

Development of fruit, Development of Fruit Concurrent with the develo...

Development of Fruit Concurrent with the development of the seed(s), the ovary is transformed into a fruit. The fruit protects the seeds and allows their release or germinati

Proteins, what is he importance of proteins for living beings

what is he importance of proteins for living beings

Hypertension, Define hypertension, discuss its causes and explain its effec...

Define hypertension, discuss its causes and explain its effects on the body. What role, if any, does medical imaging play in hypertensive patients? Explain and give examples.

Pasteur''s experiment, Louis Pasteur (1860-1862) French): Even after th...

Louis Pasteur (1860-1862) French): Even after the experiments of Spallanzani, the conflict of a biogenesis and biogenesis continued well into the middle of 19 th century till

Explain nelfinavir, Explain Nelfinavir (NFV, Viracept)  Nelfinavir is a...

Explain Nelfinavir (NFV, Viracept)  Nelfinavir is a commonly used protease inhibitor because it is well tolerated. It appears to be less potent than lopinavir/ritonavir or efav

Food and diet, could you survive on a diet which contain no carbohydrates

could you survive on a diet which contain no carbohydrates

Bacterial growth medium, how a simple medium can be converted into selecti...

how a simple medium can be converted into selective differential and enriched medium?

Pericardial valves: carpentier edwards, Pericardial Valves: Carpentier Edwa...

Pericardial Valves: Carpentier Edwards (Perimount Valve) :  Pericardium preserved in gluteraldehyde and mounted on flexible stent is available for mitral and aortic positions

Express the term in brief protonephridia., Express the term in brief - Prot...

Express the term in brief - Protonephridia. An osmoregulatory-excretory structure found in some invertebrates. Also known as a flamecell, this tubule is closed at its distal en

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