EO2
Define electronegativity
Electronegativity is a chemical property that describes the tendency of an atom or a functional group to attract electrons toward itself. The electronegativity of an atom is affected by both its atomic number and the distance that its valence electrons reside from the charged nuclei.
What is 3000 mm in cm?
300 cm (divide by 10)
Which biomacromolecule is responsible for storing genetic information?
Nucleic acid
What type of reaction has a positive change in free energy?
Endergonic
What does the cell membrane do?
The cell membrane regulates the transport of materials entering and exiting the cell.
250 m to nm
2.5e+11 (multiply by 1e+9)
How can you tell if a molecule will be hydrophobic or hydrophilic?
Non-polar: hydrophobic (no partial charges to interact)
Polar: hydrophilic (partial charges are attracted to partial charges on water)
How does an enzyme lower the activation energy?
Stabilizes the transition state
What is the most electronegative atom we discuss in this class?
Oxygen
You need to create a protein standard curve with 7 tubes, each 1/2 the concentration of the previous, how would you do this?
Set up 7 tubes. Pipette in 50% solute and 50% solution from the previous tube, the resulting tube will be half the concentration of the previous tube.
Is a protein considered active or passive? Why?
Active- This versatile class of macromolecule is involved in virtually every cellular process: proteins replicate and transcribe DNA, and produce, process, and secrete other proteins. They control cell division, metabolism, and the flow of materials and information into and out of the cell.
Draw and label a rate diagram for a reaction with and without an enzyme present.
Drawn
How would a polar molecule interact with water? How could you represent that in a drawing?
A polar molecule will bond to water. This can be demonstrated by drawing a dotted line from one atom with a partial charge to another atom with a partial positive charge. (Ex: Dotted line between partially positive hydrogen on a polar molecule to partially negative oxygen on a water molecule)
In a dilution with 4 tubes where each is 1/4 the concentration of the previous if your first tube had a concentration of 100 mg/mL, what would the concentration of the fourth tube be?
100, 25, 6.25, 1.56
How could you identify if a molecule is a protein by looking at it's structure? What is unique to proteins?
The R group is unique
Proteins are the only group that could contain sulfur (in the R group)
Draw and label a diagram of an endothermic reaction with and without an enzyme present
Drawn
Draw a water molecule including all subatomic particles
Drawing
In a dilution with 9 tubes where each is 1/2 the concentration of the previous if your first tube had a concentration of 150 mg/mL, what would the concentration of the sixth tube be?
150, 75, 37.5, 18.75, 9.38, 4.69
Draw an example of each biomacromolecule and explain how you know that each one is the biomacromolecule you are demonstrating.
Drawn
Draw and label a diagram of an exothermic reaction with and without an enzyme present
Drawn