Test 3 review Flashcards
(32 cards)
if something is in static equilibrium what happens to electric and grav. forces?
in static equilibrium (like oil drop), the electric force (qE) = gravity force . hence qE= mg
What type of molecule is a leptin receptor? Which method used to detect proteins?
Leptin receptor is a protein.
Western blotting can be used to detect proteins
What occurs during Oxidative phosphorylation ? Where does it occur?
there is a proton gradient across the inner mitochondrial membrane, where formation of ATP occurs by ATP synthase.
Why is ATP a good energy carrier ?
ATP a good energy carrier b/c it has an intermediate transfer potential. This allows higher energy phosphate carriers (like creatine phosphate) to drive the synthesis of ATP by transferring their phosphate groups to ADP
What determines the polarity of a bond ?
The polarity of a bond depends on the difference in electronegativity between the two bonding atoms:
The larger the difference, the more unequal the sharing of electrons, and the more polar the bond.
ex: the Si—Cl bond (Cl is more EN than Si by large difference) hence it is polar
what is the relationship between decibel (sound) level and intensity of sound?
For each increase by 10 in the decibel level, the intensity of the sound increases by a factor of 10.
ex: if sound level changes from 35 db to 55 db, decibel level has increased by two units of 10 (since 55 – 35 = 20 = 10 + 10), so the sound intensity increases by two factors of 10, that is, by a factor of 10^2 = 100.
How do you change an equilibrium constant ?
Change the Temperature
How does a catalyst (enzyme) increase reaction rate ?
it decreases activation energy
What is the difference in pressure between two points in a static fluid ?
The difference in pressure between two points in a static fluid is given by the expression ρfluidgy, where y is the vertical distance between the two points.
what is equation for volume flow rate?
Volume flow rate; F= Av
A: cross sectional area
V: average speed of flow
How many L is one 1 m^3
1000 L = 1 m^3
What is a lewis base?
A Lewis base functions as an electron donor in an acid-base reaction
-lewis base aka ligand
What is a Bronsted acid vs base ?
A Brønsted acid acts as a proton donor
Brønsted base acts as a proton acceptor;
What is Snell’s law equation
Snell’s Law: n1sintheta1 = n2 sin theta 2
what is relationship between H+ concentration and pH
The higher the H+ concentration, the Lower the pH
Where does post translational modification occur? What happens after that?
Posttranslational modification occurs in the ER . T
hen transportation to the plasma membrane via vesicles occur
Where does translation of proteins occur?
cytosol
What is role of signal recognition particle in translation ?
The signal recognition particle identifies Partially translated mRNA-ribosome complexes with a targeting sequence in the cytosol and targets them to the rough ER, at which point translation continues and post-translational modifications
When can hydride shifts occur?
Hydride shifts can occur only from a CARBOCATION intermediate
Is methyl iodide (Ch3I) a nucleophile or electrophile ?
Ch3I is a electrophile (since double bond will attack it and substitute I )
how do imines vs Examines form ?
Enamines form when an aldehyde or ketone combines with a secondary amine
Imines form when an aldehyde or ketone combines with a primary amine
What happens to atom in Beta - decay?
Each β– decay increases the number of protons by 1, but leaves the total number of protons and neutrons (mass number) unchanged.
What happens to atom in alpha decay ?
Each αlpha decay DECREASES the number of protons by 2 and decreases the total number of protons and neutrons (mass number) by 4.
What is the equation that relates momentum (p) to kinetic energy (K) ?
equation relating momentum, p, to kinetic energy, K, is p = square root of 2 x Kinetic energy (K) x mass
