5 Written questions
5 Matching questions
- Do the functional groups have an impact on life? Give an example.
- How do acids and bases affect pH?
- What are the differences between a hydrophilic and hydrophobic substance?
- What is heat of vaporization? How does it relate to evaporative cooling? What affect does it have on living organisms?
- Organic molecules must always contain what?
- a Heat required to convert 1g of liquid into a gaseous state (high); Evaporative cooling is the warmest molecules of a liquid leave as a gas; allows us to sweat, or release heat so we don't die
- b Hydrophilic - attracted to water; polar or ionic; has charge
Hydrophobic - repels water; nonpolar; no charge
- c Yes. Ex: tiny tag from a functional group determines whether we are males or females
- d Carbon and Hydrogen
- e Acids raise the concentration of H⁺ ions in an aqueous solution (decreases the pH number)
Bases lower the concentration of H⁺ ions (increases the pH number)
5 Multiple choice questions
- Phosphate (−OPO₃²⁻) (acid: DNA, cell membrane, ATP); P double to O, single to O, 2 O⁻
Ex: glycerol phosphate
- Hydroxyl, Carbonyl, Carboxyl, Amino, Sulfhydryl, Phosphate, and Methyl
- Hydrogen bonds are the bonds between two polar molecules - one with a partial positive charge and one with a partial negative charge; water is perfect for this because it has the partial negative of Oxygen and the partial positive of Hydrogen.
- Resistance to change in temperature
5 True/False questions
Draw functional group structure and give molecular formula for: Carboxyl.
Example? → Carbonyl (>CO) (ketones, aldehydes, sugars); C double bonded to O
Ex: Acetone, the simplest ketone
What are the different types of isomers (changes) and how are they different? → 1.) Structural - changes structural form; same formula, different structure
2.) Geometric - differ in spatial arrangement due to inflexibility of double bond (two types: cis and trans) 3.) Enantiomers - mirror images of each other
Does form impact function? → Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH
Draw functional group structure and give molecular formula for: Sulfhydryl.
Example? → Hydroxyl (polar, form hydrogen bonds, polar solvents)
−OH (may be written HO-)
Ex: Alcohols, such as Ethanol
What is the pH scale? → Buffers are molecules that resist change in pH; they either release H⁺ to lower the pH or take up H⁺ to raise the pH