Presence of starch, reducing sugars, lipids, proteins?

Question

This is about identifying biological molecules.

Does milk have

(a) starch

(b) reducing sugars

(c) lipids

(d) proteins

Does oil have

(a) starch

(b) reducing sugars

(c) lipids

(d) proteins

Does bread have

(a) starch

(b) reducing sugars

(c) lipids

(d) proteins

Does banana have

(a) starch

(b) reducing sugars

(c) lipids

(d) proteins

Answer 1

Milk: d. proteins

Oil: c. lipid

Bread: a. starch

banana: b. reducing sugars

Answer 2

Milk usually has prombin, a protein. Oil is broken down into lipids. Bread, when acted upon by amylase shows signs of reducing sugars. Banana's not too sure about, but since it is a sweet fruit, it might have starch.