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HomeHomework HelpbiologyDNA Structure Overview

DNA Structure Overview

DNA structure refers to the double helix formation of deoxyribonucleic acid, where two long strands of nucleotides are intertwined, with each nucleotide consisting of a sugar, a phosphate group, and a nitrogenous base. The specific pairing of the nitrogenous bases (adenine with thymine and cytosine with guanine) stabilizes the helical structure and encodes genetic information.

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Overview

DNA, or deoxyribonucleic acid, is the fundamental molecule that carries genetic information in all living organisms. Its structure is famously known as a double helix, which resembles a twisted ladder. This unique shape allows DNA to store vast amounts of information efficiently. Each rung of the la...

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Key Terms

DNA
Deoxyribonucleic acid, the molecule that carries genetic information.

Example: DNA determines traits like eye color.

Nucleotide
The basic building block of DNA, consisting of a sugar, phosphate, and base.

Example: A nucleotide can be adenine, thymine, cytosine, or guanine.

Double Helix
The twisted ladder shape of DNA formed by two strands.

Example: The double helix structure was discovered by Watson and Crick.

Base Pairing
The specific pairing of nitrogenous bases in DNA.

Example: Adenine pairs with thymine, and cytosine pairs with guanine.

Genetic Code
The set of rules by which information encoded in DNA is translated into proteins.

Example: The genetic code determines how amino acids are sequenced in proteins.

Chromosome
A structure made of DNA and proteins that contains genetic information.

Example: Humans have 23 pairs of chromosomes.

Related Topics

RNA Structure
Learn about the structure and function of RNA, which plays a key role in protein synthesis.
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Protein Synthesis
Explore how DNA is translated into proteins through transcription and translation processes.
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Genetic Engineering
Understand the techniques used to modify DNA for various applications in science and medicine.
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Key Concepts

Double HelixNucleotidesBase PairingGenetic Code