Watson-crick Model
Watson-crick Model - Related Videos
02:05
DNA as a Genetic Template
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2020
Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
09:04
Sequence-specific and Selective Recognition of Double-stranded RNAs over Single-stranded RNAs by Chemically Modified Peptide Nucleic Acids
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Cited by 12 •
2017
We report the protocols for the synthesis and purification of Peptide Nucleic Acid (PNA) oligomers incorporating modified residues. The biochemical and biophysical methods for the characterization of the recognition of RNA duplexes by the modified PNAs are described.
11:03
An Overview of Gene Expression
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2023
Gene expression is the complex process where a cell uses its genetic information to make functional products. This process is regulated at multiple stages, and any misregulation could lead to diseases such as cancer. This video highlights important historical discoveries relating to gene expression, including the understanding of how distinct combinations of DNA bases encode the amino acids that make up proteins. Key questions in the field of gene expression research are explored, followed by a...
14:54
Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy
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Cited by 2 •
2015
The goal of this protocol is to photochemically induce ischemic injury to the posterior optic nerve in rat. This model is critical to studies of the pathophysiology of posterior ischemic optic neuropathy, and therapeutic approaches for this and other optic neuropathies, as well as of other CNS ischemic diseases.
06:03
Oropharyngeal Administration of Bleomycin in the Murine Model of Pulmonary Fibrosis
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Cited by 2 •
2025
This protocol demonstrates the oropharyngeal aspiration technique for use in the bleomycin murine model of pulmonary fibrosis.
FAQs
The two DNA strands run in opposite orientations, creating an organized arrangement between the sugar-phosphate backbones and paired bases. This geometry places complementary bases in positions where their hydrogen-bonding relationships can stabilize the double helix. It also allows either strand to provide the sequence information needed to guide formation of a complementary strand during copying.
Complementary pairing creates a predictable relationship between the bases on opposite strands: adenine corresponds to thymine, and guanine corresponds to cytosine. Because each sequence specifies its partner, the strands contain linked versions of the same hereditary information. This correspondence helps preserve sequence information when DNA is copied and provides a basis for understanding how changes can produce mutations.
The bases carry the pairing relationships that encode and reproduce sequence information, whereas the sugar-phosphate groups form the external backbone that supports the strands. This division of roles gives DNA both informational specificity and a stable structural framework. The model therefore connects molecular architecture with the biological need to store hereditary information in an organized, copyable form.
The model makes mutations understandable as changes affecting the ordered base information within DNA. Since each strand is linked to its complementary sequence, an altered base relationship can change the information represented by that region. This structural perspective connects molecular changes with biological inheritance and gives researchers a framework for examining how sequence differences may influence genetic information.
DNA sequencing relies conceptually on the model because complementary base relationships help researchers interpret one strand in relation to the other. A sequence can therefore be examined not as an isolated string of bases, but as part of a paired information system. This framework supports analysis of genetic material and helps connect observed sequences with hereditary information.
The model supplies the structural foundation for approaches that analyze or manipulate DNA. Understanding complementary strands and base pairing helps researchers reason about how genetic information is organized before studying engineered changes or biomedical questions. Its relevance extends from gene transmission and mutation research to modern molecular biology, where DNA structure guides investigations of hereditary information and its alteration.