biology and structure of viruses

Question 1

describe the simple structure of a virus

Answer 1

all contain RNA or DNA (never both)
have a protein coat made up of repeated subunits of virally encoded proteins that are built like lego bricks to build a simple structure
some have a lipid envelope over protein coat

Question 2

what structure do adenoviruses have

Answer 2

they have icosahedral symmetry

Question 3

describe a helical symmetry strutcure

Answer 3

made up of single repeated unit, virus only has code for 1 protein which spiral round viral nucleic acid