Water, Miraculous Water
Macro...macro what?
Chemical reactions
Enzymes
The whole shebang
100
High specific heat allows for more heat to be absorbed by water before its temperature rises. What does this property do for the earth?
It keeps the temperature moderate since water absorbs the heat all day and releases it at night.
100
How many bonds can carbon have? And is this unique?
4. yes, carbon only has 4 valence electrons
100
In a graph of a reaction, what does the hill represent?
activation energy
100
What does a catalyst do to a reaction?
It lowers the activation energy so the reaction is faster.
100
Describe how an ionic bond is formed and how a covalent bond is formed.
Ionic is a transfer of electrons. Covalent is a sharing of electrons.
200
What gives water the properties of specific heat, cohesion, adhesion, and universal solvent?
Hydrogen bonds.
200
What are the four types of macromolecules? Are these monomers or polymers? WHY?
carbohydrates, lipids, proteins and nucleic acids. POLYMERS...the polymers are built by the monomers.
200
Bonds form and break. Which of these needs energy?
Bonds breaking require energy. think separating a magnet.
200
What term refers to the speed of a reaction?
Reaction Rate
200
When an ion is formed is it more stable or less stable? WHY?
more stable. all valence electrons are paired.
300
Where on a pH scale has the highest concentration of H ions?
acidic 1-6 with 1 being the highest.
300
What is the monomer for a lipid? and what is a lipid?
fatty acids...so fats and oils.
300
What is an exothermic reaction?
RELEASES energy
300
What does an enzyme (or catalyst) do the bonds of a reactant?
weakens or strains them.
300
If an ion loses an electron is it a positive ion or a negative ion?
positive ion
400
Give an example of surface tension. What property of water creates surface tension?
Water creating dome as paper clips are added to graduated cylinder. COHESION.
400
What type of molecule is formed by amino acids?
Proteins
400
What is an endothermic reaction?
absorbs energy
400
In the enzyme lock-and-key model there are 3 pieces. One is the enzyme, what are the other two?
substrates
400
What is the bond between amino acids?
Peptide bond
500
Which has a more adhesion: Mercury clinging to itself, or water clinging to the side of a graduated cylinder?
water clinging to the side of a graduated cylinder.
500
Is a saturated fatty acid solid or liquid? How does it get that shape?
Solid. It is saturated in hydrogens which don't allow it to get close to itself, so it can't pack closely enough to create a solid.
500
What does an ENDOTHERMIC reaction look like as a graph?
The reactants have lower bond energies than the products?
500
What changes the shape and function of an enzyme?
pH or temperature.
500
What happens if an amino acid is changed in a protein?
The function and shape changes
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