Download Biochemistry I INTRO

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Introduction
Viruses
• Viruses cannot exist independently and are usually not
considered a life-form.
• Viruses are deemed parasites since they are unable to carry out
metabolism or reproduction without the help of a host cell.
• When viruses infect a cell, they take control of the cells
metabolic machinery and force it to synthesize nucleic acids and
proteins for new virus particle.
• Viruses are the cause of many plant and animal maladies and
their presence in the world has resulted in much human
suffering.
• However, enormous amount of biochemistry has been learned
form studies of their actions.
Introduction
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