Where can membrane proteins be located? a. entirely within the membrane b. on the surface of the membrane c. in either position d. the position of membrane proteins has never been determined

C) in either position

Explanation:

There are two kinds of membrane protein:

a) Integral proteins:  They have a fixed or permanent association with the membrane. They are majorly embedded in the middle layer of membrane.   A kind of integral proteins are transmembrane proteins, they can cross the membrane and are path for transport of ions or molecule in and out cell.

b) Peripheral proteins: The are confined to the surface of membrane and are boned with ionic interactions. they are more in number as compared to integral proteins.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.