D. Capsid

Question 1

define capsid

Answer 1

the protein shell surrounding the genome

Question 2

define nucleocapsid

Answer 2

combination of genome in the capsid. only used in HIV reference

Question 3

How is HIV unusual pertaining to its nucleocapsid

Answer 3

has a nucleocapsid enclosed by a capsid

Question 4

capsid structure

Answer 4

composed of multiple copies of 1 o a few proteins. proteins bond non covalently to each other. bonding occurs in specific way to form a regularly shaped structure

Question 5

most viruses have capsids shaped like

Answer 5

helical or icosahedral symmetry

Question 6

helical capsid eg virues

Answer 6

tobacco mosaic viruses

Question 7

helical capsid structure

Answer 7

proteins bind directly to genome and to all other adjacent subunits. binding winds the genome into helix. overall shape is filamentous

Question 8

icosohedral symmetry stucture

Answer 8

of proteins/sides varies in diff viruses. small virus like polio has 60 copies of 3 diff proteins forming the capsid wall. overall shape is spherical, encloses the genome

Question 9

complex symmetry eg

Answer 9

T4 bacteriophage and adenovirus