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HomeHomework HelpbiologyDNA Structure Composition

DNA Structure Composition

The DNA structure composition topic involves understanding the specific components of DNA, including the sugar molecules (deoxyribose) that make up the backbone of DNA. This topic covers the identification and role of the third carbon in the sugar molecule, which is crucial for the phosphodiester bond formation and the overall double helix structure of DNA. Understanding DNA composition is significant in Biological Sciences as it underlies the mechanisms of genetic inheritance and expression.

beginner
2 hours
Biology
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Overview

DNA, or deoxyribonucleic acid, is the hereditary material in all known living organisms. It is composed of nucleotides, which include a sugar, a phosphate group, and a nitrogenous base. The unique sequence of these bases encodes genetic information, which is crucial for the development, functioning,...

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Key Terms

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 of nucleotides.

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

Base Pairing
The specific pairing of nitrogenous bases in DNA.

Example: A pairs with T, and C pairs with G.

Sugar-Phosphate Backbone
The structural framework of DNA, consisting of alternating sugar and phosphate groups.

Example: The backbone provides stability to the DNA molecule.

Replication
The process of copying DNA before cell division.

Example: DNA replication ensures each new cell has the same genetic information.

Transcription
The process of converting DNA into RNA.

Example: During transcription, the DNA sequence is copied into messenger RNA.

Related Topics

RNA Structure and Function
Explores the structure of RNA and its role in protein synthesis.
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Genetic Mutations
Covers types of genetic mutations and their effects on organisms.
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Protein Synthesis
Details the processes of transcription and translation in creating proteins.
intermediate

Key Concepts

NucleotidesDouble HelixBase PairingSugar-Phosphate Backbone