Starch differs from cellulose specifically in that (select all that apply):

1. Starch is a branched polymer. Cellulose is not branched.
2. Starch is for energy storage, while cellulose is primarily structural.
3. Starch contains alpha-glycosidic linkages between monomers, while cellulose contains beta-glycosidic linkages.
4. Starch is made by animal cells. Cellulose is made by plants.

option 1, 2, 3

Explanation:

Starch is present in plants and used for energy storage. It is a branched polypeptide and made of two units amylose and amylopectin.

Amylose is linear while amylopectin is branched. Monomer of starch is glucose and two glucose units are joined by aplha-1,4-glycosidic linkages.

Cellulose is a structural polypeptide and present in the cell wall of the plant. It is a linear polymer made of glucose. The two glucose units are joined by the β-glycosidic linkages.

Therefore, among the given, options 1, 2 and 3 are correct.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

it is b that is the answer.