Bio Webquest

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BASIC CHEMISTRY 
1. What is the difference between being ionized and being polar?

When ionized the atom will either lose or gain electrons. A polarized molecule has an overall neutral charge with positive and negative sides such as H2O.
2.     Compare macromolecules to Monomers; complete the chart below Example of a Macromolecule| Corresponding Monomer|
polysaccharide|  monosaccharide|
 lipids| glycerol, fatty acid|
protein| Amino acids |
nucleic acid|  necleotides|
 CARBOHYDRATES
1. List the three main groups of carbohydrates.

The three main group of carbohydrates are monosaccharides, disaccharides, and polysaccharides

2. Play the animation of dehydration synthesis. What two monosaccarides did you start with? What disaccharide was produced? What molecule was created as a bi-product?

The dehydration synthesis started with two glucose molecules, an H+ ion and an OH- ion were released creating Maltose and water as a bi-product.

3. Four types of polysaccarides are mentioned on this page, name them. Which are found in animals?

The four types of polysaccaries are starch, glycogen, cellulose, and chitin.
Glycogen is found in animals, chitin is found in arthropods.
Starch and cellulose is found in plants.
LIPIDS
Neutral Fats:
1. Play the animation of fatty acids being attached to the glycerol backbone by dehydration synthesis. When making one (lipid) triglyceride, how many molecules of water are formed?
The process of making a triglyceride results in the release of a H+ ion and an OH- ion creating one molecule of water.  Phospholipids and the Cell Membrane
1. Name the four parts to a phospholipid molecule
A phospholipid contains a polar head group and two hydrophobic hydrocarbon tails, which are usually fatty acids. 2. Play the animation of phospholipids being immersed in water. Why do the tails float in the water pointing up? What happens when a second layer of...
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