Biological Molecules

Hello, class!


Do you guys know that ? 
→Our body is made up with thousands and thousands organic molecules such as carbohydrates, proteins, lipids, and nucleic acids. Each of them has different roles in our body and helps our metabolic activities. 

So last week I did an experiment to determine what kind of biological molecules are in our daily products may help to understand chemical process in living organism.    

·      Benedict’s test

First, I added 1mL of test solution into a clean and dry test tube.

Then, I mixed it with 1mL of Benedict’s reagent and made sure both were well mixed together. After that, I heat the test tube in 95-99℃ water bath in 4-5 minutes. 

We chose four different types of foods, almond, pineapple juice, cucumber and bread. In experiment Buiurets, we got the react that pineapple juice did not have protein, so the color after experiment should be blue, however, we got the green color. So we guessed that because the color of pineapple juice is yellow that is why the color was green.

Here is a result.

Experiment 1 (Benedict solution)	Presence reducing sugars?	Positive Control(Glucose)	Negative Control(H2O)	After changing color
Almond	Small amount	Yes	no	Little bit blue green
Juice(Pineapple)	Large amount	Yes	No	Yellow Orange
Cucumber	Large amount	Yes	no	Red Orange
Bread	Large amount	Yes	No	Orange