Test for Monosaccharides:  Clinistix Carbohydrate molecules range from the very simple to the very complex. The word “saccharide” means sugar, while the prefixes “mono”, “di” and “poly” categorize carbohydrates according to how many simple sugar molecules are joined together to form the carbohydrate.   To test for the presence of monosaccharide, we will be using Clinistix (a product that is used to test for the presence of glucose in urine).  See the label (in video) for details.  These test strips are used by dipping the colored end into the solution, then comparing the color to the chart on the bottle.  The positive color(s) is/are __________________________.  The negative color is ________________.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
icon
Related questions
icon
Concept explainers
Question

Test for Monosaccharides:  Clinistix

Carbohydrate molecules range from the very simple to the very complex. The word “saccharide” means sugar, while the prefixes “mono”, “di” and “poly” categorize carbohydrates according to how many simple sugar molecules are joined together to form the carbohydrate.

 

To test for the presence of monosaccharide, we will be using Clinistix (a product that is used to test for the presence of glucose in urine).  See the label (in video) for details.  These test strips are used by dipping the colored end into the solution, then comparing the color to the chart on the bottle.  The positive color(s) is/are __________________________.  The negative color is ________________.

 

Test for Starch (a Polysaccharide):  Povidone Iodide Test

Plant cells manufacture glucose molecules during photosynthesis and store them in large starch molecules.  Because starch is a long chain of many glucose units all joined together, it is a polysaccharide. Povidone Iodide (which is normally amber-brown) will undergo a characteristic color change in the presence of starch.  See the example in the video:  The positive color(s) is/are __________________________.  The negative color is ________________.

 

Test for Protein:  Clinistix

 

Proteins are the building blocks of most tissues.  To test for the presence of protein, we will be using Clinistix (a product that is used to test for the presence of protein in urine).  See the label for details.  These test strips are used by dipping the colored end into the solution, then comparing the color to the chart on the bottle.  The positive color(s) is/are __________________________.  The negative color is ________________.

 

Test for Fats (a Lipid):  Brown Paper Test

 

Fats are large molecules that are used to store energy in cells.  As you know if you’ve ever tried to mix oil and water, lipids do not mix well with water.  (They are hydrophobic.)  We will test for the presence of fats using plain old brown paper.  

 

  1. Place a few drops of oil (whatever you have on hand) on the brown paper bag.  Write “oil” on this area.

 

  1. Place a few drops of water on the brown paper bag.  Write “water” on this area.

 

  1. Let dry.  If you put it under a light (like a desk lamp) it will dry out faster.  

 

  1. Compare the two pieces of paper.  How do they look different?

Positive:

Negative:

Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 3 steps

Blurred answer
Knowledge Booster
Macromolecules
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:
9780134580999
Author:
Elaine N. Marieb, Katja N. Hoehn
Publisher:
PEARSON
Biology 2e
Biology 2e
Biology
ISBN:
9781947172517
Author:
Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:
OpenStax
Anatomy & Physiology
Anatomy & Physiology
Biology
ISBN:
9781259398629
Author:
McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:
Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:
9780815344322
Author:
Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:
W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:
9781260159363
Author:
Martin, Terry R., Prentice-craver, Cynthia
Publisher:
McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Inquiry Into Life (16th Edition)
Biology
ISBN:
9781260231700
Author:
Sylvia S. Mader, Michael Windelspecht
Publisher:
McGraw Hill Education