Lecture18_Viruses - Viruses I What are viruses A Definition...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Viruses I. What are viruses? A. Definition: Viruses are obligate intracellular parasites • "obligate" = they cannot reproduce on their own • "intracellular" = they enter cells to replicate • "parasites" = they take over the host cell's machinery (enzymes and nutrients) to make copies of themselves and … … in the process, they usually Note: Outside of host cells, viruses do B. Are viruses alive? definitions of a living entity (thing): 1) ability to make a 2) metabolism = controlled chemical reactions required for Viruses The cell as the fundamental structural unit of life; viruses are Viruses are not II. Viral diversity A. Genetic material In all organisms, the genetic material consists of paired strands of deoxyribonucleic acid (DNA) = "double-stranded DNA" Viral genomes may be: • double-stranded DNA • single-stranded DNA • double-stranded ribonucleic acid (RNA) • single-stranded RNA … and other variations B. Morphological diversity in viruses NOTE: viruses are TINY … typically
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 3

Lecture18_Viruses - Viruses I What are viruses A Definition...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online