Viruses Name:_________

Introduction to viruses

• Smallest living organisms _________________

• _________________ parasites

• Only reproduce in _________________ cells

• Viruses transferred between cells as inert particles known as _________________

• Virus structure

Different Shapes

Name of shape:

Example:

Functions of capsid and envelope

• _________________ the nucleic acid from enzymes and chemicals when virus is outside host cell

• _________________ to the surface of the host cell

• _________________ in penetration of the host cell

Methods of entry into host cell

Retroviruses

• Have _________________ not _________________

• Use reverse transcriptase to change:

What is a cDNA library

• _________________DNA (cDNA)

• cDNA created from mRNA using _________________ _________________

virus

Host cell membrane

• _________________: complete set of all the molecules contained within a cell or organism