viruses - VIRUSES CHARACTERISTICS : A. Cell type -...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
VIRUSES CHARACTERISTICS : A. Cell type - eukaryotic, prokaryotic ? B. Acellular C. Obligate intracellular parasites D. Nonliving ? Living ? E. Kingdom ? VIRAL STRUCTURE A. Size : 1. Measured in nanometers (nm.) 2. 1000 nm = 1 μ m 3. Average range in size : 20 nm to 300 nm B. Structure : 1. Core a. DNA or RNA b. Contains genetic information 2. Capsid a. Outer protein coat b. Functions 1). Protects core 2). Shape of the virus 3). Attachment to host cell membrane (by means of spikes) c. Envelope 1). Membrane around capsid - enveloped virus (a). Not all viruses have envelope (b). If lack envelope - naked virus 2). Composed of: (a). Bilayer of phospholipids and proteins (b). Derived from host bell membrane during viral multiplication
Background image of page 1

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

View Full DocumentRight Arrow Icon
3). Functions : (a). Protection from drying (enhances transmission) (b). Makes virus more susceptible to chemical agents that dissolve lipids (c). Attachment to host cell membrane (by means of spikes) VIRAL SHAPE : A. Structure of capsid: 1. Subunits – called capsomeres
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

viruses - VIRUSES CHARACTERISTICS : A. Cell type -...

This preview shows document pages 1 - 3. Sign up to view the full document.

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