Gen Chem<3<3<3
what is the formula for percent yield?
actual yield/theoretical * 100%
explain why the actual mass of a nucleus is a bit smaller than the sum of the protons and neutrons
mass defect is due to the binding energy of the nucleus
what are desmosomes? where are they primarily found?
Desmosomes
◦ bind adjacent cells by anchoring to their cytoskeletons
◦ formed by interactions between transmembrane proteins that are associated with intermediate filaments
◦ primarily found at the interface between two layers of epithelial tissue
define chemotaxis
the cells ability to detect chemical stimuli and move toward or away from them
what is the difference between medicare & Medicaid? what are the qualifying ages for each?
for bonus 100 each:
what year were medicare & Medicaid created? & by which president?
what year was the ACA passed?
what year did the ACA fully come into effect?
medicare = 65+
medicaid = poor, defined differently by state, no qualifying age
M&M created in 1965, LBJ
ACA passed 2010, full effect in 2014 (main thing was marketplaces)
what is the difference between adiabatic and isobaric processes?
adiabatic = no heat exchanged
isobaric = constant pressure
what is the equation for the energy of a photon?
E = hf
how does the presence of cholesterol in the cell membrane influence fluidity at high and low temps?
inc fluidity at low
dec fluidity at high
what does the hematocrit test determine?
for an extra 200:
approx what is the expected range?
the proportion of red blood cells in your blood.
males: 41-50%ish
females: 36-46% ish
what is the fundamental unit of charge?
1.6 x 10^-19 C
Zn2+ (aq) + 2e- --> Zn(s) V = -0.76
Cu2+ (aq) + 2e- --> Cu(s) V = +0.34
which reaction takes place at the anode, which at the cathode?
Zn --> Zn2+ at anode
Cu2+ at cathode
neither :)
gamma rays are high energy photons that carry no charge and simply lower the energy of the parent nucleus without changing the mass or atomic number
daily triple🥵🤪🥳🧠
(1) differentiate between integral proteins and membrane-associated/peripheral proteins.
(2)describe the 2 kinds of integral proteins.
(3)what kind of protein is the G protein (that interacts with the GPCR)?
integral = associate with the interior of plasma membrane
- transmembrane = pass completely thru bilayer. eg. transporters, channels, receptors
- embedded proteins = associate only with interior (cytoplasmic) or exterior (extracellular) surface of the membrane
peripheral = bound via electrostatic interactions to the bilayer
g protein is peripheral
pls give the reactions for the bicarbonate buffer system <3
CO2 + H2O <--> H2CO3 <--> H+ + HCO3-
when the body is deprived of sustinance, it goes into starvation. there are different stages.
what does the body rely on for energy after about 24hrs of not eating?
what does the body rely on after several days/a week of fasting?
24 hrs, gluconeogenesis
days later, 2/3 ketone bodies, 1/3 glucose
I like to salt my pasta water. To 2L of water, I add 15 grams of salt (NaCl, MM = 58.44 g/mol).
At what temperature will the water boil?
Kb of water is 0.51
∆T = k m i
∆T = (0.51)*(0.128)*2 = 0.058 = 0.131 degrees
molal = moles/kg = 0.25/2kg = 0.128
100.13 degrees C
Daily Triple: (for 1200)
I create a vaccine that has a half-life of 100 days. The FDA declares that when 40% has decayed the vaccine must be disposed of, as it is no longer of an acceptable efficacy level.
How many days can I store the vaccine before I need to dispose of it?
60% left
after 100 days, there is 50% left. So it will be less than 100 days.
need to use: N = No e^-0.693/T1/2*t
the exponential decay formula
answer = 73.71 days (73)
what is a lipid raft?
• lipid rafts are collections of similar lipids with or without associated proteins that serve as attachment points for other biomolecules -- often serve roles in signaling
describe the difference between lysogenic and lytic cycles
lysogenic: viral DNA gets embedded in host cell's genome.
lytic: only machinery is used to reproduce the virus, cell is lysed and virions are released
what is meant by the term "second sickness"
the worsening of health conditions based on socioeconomic disparities in healthcare.
Daily double:
I create a buffer with 100mL of 0.10M acetic acid (CH3COOH, Ka = 1.8x10^-5) and 100 mL of 0.10M CH3COONa.
What is the starting pH of the buffer?
Then I add 10 mL of 0.1M HCl. What is the new pH of the solution?
4.75
4.66
solution on another doc
how does IR spectroscopy work?
allows you to determine chemical structure because different bonds will absorb different wavelengths of light
describe the differences between the outer mitochondrial membrane and inner mitochondrial membrane
Outer is highly permeable, has many pores
Inner is much more restricted in terms of permeability. It has many foldings (cristae) that increase SA for integral proteins. Does not contain cholesterol.
In what location/structure do sperm gain mobility and are stored?
what kind of cell nourishes sperm?
epididymis
sertoli cells
a patient complains of persistant and strong worry about a variety of things-- returning phone calls, doing well in school. They also have increased fatigue, muscle tension and sleep problems. This has all lasted 6 months.
what would you diagnose the patient with?
generalized anxiety disorder