Chem/Phys
-oate is the IUPAC suffix ending of what class of compounds?
______ cells form the barrier between the cerebrospinal fluid and interstitial fluid of the CNS.
Ependymal cells
The backbone of DNA is formed by what type of linkage?
phosphodiester
What is a [cultural] symbol?
A symbol (in regards to culture) is a non-material which people attach meaning to and/or what people use to communicate.
What is avogadros number?
6.0 x 1023
What are the 4 factors that effect nucleophilcity?
EN, charge, steric hinderance, solvent
What does pepsin do and where is it secreted from?
the stomach and breaks down proteins
__________ the pH of an acidic solution will __________ the pKa of the acid.
a. Decreasing . . . not change
b. Increasing . . . decrease
c. Decreasing . . . increase
d. Increasing . . . increase
a. Decreasing . . . not change
The acidity of the solution results from the amount of hydrogen ions present in the solution. We can increase or decrease the pH of the solution by decreasing or increasing the amount of hydrogen ions present, respectively. pKa is a measure of the strength of an acid (meaning how easily it can dissociate into hydrogen ions and its conjugate base). Altering the pH of the solution will have no effect on the strength, and subsequently pKa, of the acid.
As explained by social facilitation, people tend to perform ______ on simple tasks and _______ on complex or new tasks, when in the presence of others.
a) better & better
b) better & worse
c) better & the same
d) the same on both
b) better & worse
What is the formula for absolute pressure? (Hint: The absolute pressure is defined as the sum of all pressures at a certain point within a fluid.)
Pabsolute = P0 + ρgz
where P0 = Pressure at the surface of the fluid
ρ = density
z = depth of object (distance from surface)
Which hydrocarbon has the highest melting point?
a.) C2H4
b.) C11H24
c.) C6H14
d.) C3H8
b.) C11H24
Is H2O2 the oxidizing or reducing agent in the following reaction?
2HCl + H2O2 + MnO2 → O2 + MnCl2 + 2H2O
O is oxidized from -1 in H2O2 to 0 in O2; therefore, H2O2 is the reducing agent
Which Vitamin is necessary for the successful production of clotting factor, prothrombin, in the blood?
Vitamin K
Mnemonic Trick: Vitamin K is for Koagulation
What are the 7 steps of the visual pathway?
1. eye
2. optic nerve
3. optic chiasm
4. optic tract
5. LGN (lateral geniculate nucleus)
6. visual radiations
7. visual cortex
What is the speed of light?
C = 3.0 x 108 m/s
What are tautomers?
Isomers that can be interconverted by moving a hydrogen and a double bond. Keto / Enol are tautomers.
In which stage of Meiosis do the spindle fibers connect to the centromeres of the chromosomes and align them along the middle of the cell?
Metaphase I
What are the approximate pKa's of the carboxy and amino groups of an amino acid? (Doesn't have to be exact, just whole number value.)
Carboxy pKa = ~1-2
Amino pKa = ~8-10
Define: fertility rate
Fertility rate is the average number of children born to a woman during her lifetime in a population
What is the Michaelis-menten equation?
V0 = Vmax [S]/([S]+Km)
Carboxylic acids are reduced to what, in the presence of a strong reducing agent?
primary alcohols
What do parietal cells secrete?
Intrinsic factor and HCL
What is the pKa of acetic acid? (Ka = 1.8 * 10–5)
a. 4.2
b. 2.1
c. 4.7
d. 5.3
c. 4.7
pKa is equal to –log(Ka). pKa of acetic acid is –log(1.8 * 10–5).
We know that 1 * 10–4 > 1.8 * 10–5 > 1 * 10–5, and we know that –log(1 * 10–4) = 4 and –log(1 * 10–5) = 5. Now we can conclude that the pKa is somewhere between 4 and 5.
Two answer choices fall in this range: 4.2 and 4.7.
1.8 * 10–5 is closer to 1 * 10–5 than it is to 1 * 10–4, so we can pick the answer closer to 5 than to 4 : 4.7.
What is Gesellschaft?
Gesellschaft emphasizes the larger society in which importance is placed on secondary relationships that are based on impersonal ties
What is Faraday's constant (F)?
F = 96,485 C