Author:
Evaluation:
Published: 07.11.2003.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
  • Essays 'Deoxyribonucleic Acid ', 1.
  • Essays 'Deoxyribonucleic Acid ', 2.
Extract

Extracting DNA from the Bacterium Escherichia coliIntroduction Deoxyribonucleic acid is contained in all
cells. The structure of DNA makes gene transmission possible. Since genes are segments of DNA, DNA
must be able to make exact copies of itself to enable thenext generation of cells to receive the same genes.
The DNA molecule looks like a twisted ladder. Each"side" is a chain of alternating phosphate and
deoxyribose sugar molecules. The "steps" are formed bybonded pairs of purine-pyrimidine bases. …

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