ACTIVITY NO. 8

Starch is odorless and has a strong characteristic taste.

• TRUE

• FALSE

The ________ _____ of formation of the grain is marked by the hilum.

The starch layers are uniform in composition so they have slightly different refractive indexes thus producing an appearance of concentric rings.

• TRUE

• FALSE

Specimens involved in Activity No. 8 EXTRACTION AND IDENTIFICATION OF CARBOHYDRATES are the following except;

• Sweet potato

• Corn starch

• Potato starch

• Rice starch

• Starch, USP

The starch of the layers consists of microcrystals oriented with their long axes pointing toward the hilum.

• TRUE

• FALSE

What test is being used in order to determine the presence of starch in the samples? State the color identification for both positive and negative results. (5 Points)

Based on your observations, explain the difference or the similarities among the three samples used in the experiment (Potato, corn, rice) - (10-Points)