Which explains the basis of the biuret test?
a) sudan iii dye binds to lipids and changes color
b) a blue dye binds to protein and changes color
c) under base conditions, copper ions bind to the amino groups of proteins and change color
d) iodine fits into the coils of starch polymers and changes colors

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

hope this mark me brainliest