Which part of a gene codes for protein?
a. exons
b. introns
c. promoter
d. regulatory regions

A. Exons

Explanation:

Exons

It is the coding region of the gene , which have the information to encode the protein .

Exons are composed of DNA which get translated to proteins and amino acids .

In eukaryotes , the arrangement of exons is in a continuous fashion or are separated by introns .

hence ,

the part of gene that codes for protein are A. Exons .

passive transport is a movement of biochemicals and other atomic or molecular substances across cell membranes without need of energy input. unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy.

so, according to what that says, i believe it's hypertonic and hypotonic.

good luck!