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Water and Molecules
AP Extra Credit
| Question | Answer |
|---|---|
| What are the four unusual properties of water? | Adhesion/cohesion/surface tension, moderation of temperature, expansion upon freezing, and versatility as a solvent |
| What number on the pH scale stands for neutral? | 7 |
| What is the difference between saturated and unsaturated fats? | Saturated are solids at room temperature while unsaturated fats are liquids at room temperature |
| What common parts do all amino acids share? | carboxyl group, amino group, R group and a single hydrogen atom |
| Proteins have four levels of structure. What are they? | primary, secondary, tertiary, and quaternary |
| What is the difference between DNA and RNA? | DNA is a double helix shaped molecule formed from two strands of nucleotides. RNA is a single strand of nucleotides. |
| What allows water to have its four unique properties? | Hydrogen Bonds |
| What are the three sizes carbohydrates come in? | monosaccharides, disaccharides, and polysaccharides |
| Why is waters ability to moderate temperature necessary to life? | Keeps temp. of bodies of water constant over short periods of time. warms air near large bodies of water in winter; cools air near them in the summer keeps your internal temp. constant carries away heat when water evaporates from your body when you sweat |
| At what temperature does water begin expanding as it freezes? | 4 degrees Celsius. |
| What does each full step away from a neutral on the pH scale mean? | It represents a 10-fold increase in strength of that acid. |
| What is the difference between condensation/dehydration reactions and hydrolysis reactions | Condensation/dehydration reactions join two monomers together to form a polymer. Hydrolysis reactions break apart a polymer into smaller fragments by adding a water molecule back in |
| What makes up a nucleotide? | a nitrogenous base, a pentose sugar, and a phosphate group |
| What are the different kinds of proteins? | structural protein, storage protein, transport protein, defensive proteins, and enzymes. |
| Why are lipids united as a class? | because they all share the characteristic of being hydrophobic, or not mixing with water. |
Created by:
kaylhughes
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