Choose the correct order of steps for the synthesis of vitamin d.

a. inactive vitamin d is transported to the liver where it is modified.
b. inactive, chemically altered vitamin d is transported to the kidneys.
c. uv light strikes the skin and converts a steroid molecule into an inactive form of vitamin d.
d. vitamin d is activated under the influence of pth.

a. d, a, c, b
b. a, c,b, d
c. a, b, c, d
d. c, a, b, d
e. c, b, a, d

D. c, a, b, d

Explanation:humans can synthesis vitamin D as cholecalciferol in the skin when the skin is exposed to ultraviolet-B from the sun.this cholecalciferol is modified to calcidiol in the liver.this calcidiol is then modified to calcitrol in the kidney.parathyroid hormone activates the vit D

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

i think its both a and b