Practice test 2 flashcards
What happens when you put a cell inside an ocean water?
Ocean water is heavily concentrated with salt (hypertonic) so cell would shrink and loose water to the ocean.
What happens when you put a cell inside distilled water?
Distilled water is not concentrated at all (hypotonic) so cell would grow and gain water to dilute its inner contents
What is the formula for the sulfate ion?
SO42-
During distillation, what is the purpose of introducing boiling chips and providing nucleation sites?
These two techniques help prevent super heating (aka heating a soln. past its boiling point)
What is the purpose of distillation?
Separating compounds by their boiling points, the one with the least H bonds will be boiled off first
Know how to calculate gravitational potential energy and kinetic energy
https://jackwestin.com/khan-academy-mcat/rollercoasters-are-energy-at-work
What is the electron configuration of the elements on the periodic table determined by?
It is determined by their nearest noble gas
- Know the eqn of torque: τ = rFsin(Ɵ) and how to apply it
: if they say a force is applied perpendicular to….(put in 90 degrees for the angle) likewise if they say a parallel force is applied to…(put in 180 degrees for the angle)
- Know how to apply formula for average velocity V = d/t
lookup practice probs
What are the charges of:
Thiol
Ester
Carbonyl
Carboxyl
Thiol ( - )
Ester ( + )
Carbonyl ( -/+ )
Carboxyl ( - )
Molar units?
mol / L
Convert grams to mols by using the molar mass of the molecule
What are the units for:
picograms
micrograms
milligrams
pico: 10^-12g
micro: 10^-6g
milli: 10^-3g
Recite newton’s 3 laws of gravity,
- Object will not move until outside force acts on it
- Force = mass * acceleration
- For every action there is an equal and opposite reaction
Why would N2 make a good artificial atmosphere when working with reagents that might react with oxygen?
N2 is a very inert gas that makes up 80% of the air we breathe
What are the bond angles associated with
sp hybridization
sp2 hybridization
sp3 hybridization
SP: 180 degrees
SP2: 120 degrees
SP3: 109 degrees
To refresh on organic chem reagents what do the 4 below do?
- H2 w/ Pd
- KMnO4
- O3
- LiAlH4
- very strong reduction agent - converts alkynes all the way down to alkanes
- strong oxidation agent, makes acids
- Ozonolysis; aka oxidation using O3 to cleave double bonds
- Strong reduction agent: makes alcohols
What are the IR spectroscopy peaks for:
Alcohol
Carboxylic bonds
O=C=O bonds
- 3700-3584
- 3300-2500
- 2349
Review orbital hybridization
find practice problems
When discussing the ETC, are electrons passed from species with less reduction potential to more reduction potential or vice versa?
From less reduction potential (aka NADH) to more red potential (aka O2)
What pathway (ascending or descending) takes motor signals from the brain to the lower motor neurons? Is it afferent or efferent?
Descending & efferent
What pathway (ascending or descending) transport sensory information from the body to the brain? Is it afferent or efferent?
Ascending & afferent
Why is it crucial to establish a baseline in research studies?
So that you have a neutral line of data to compare results against
True or false: RBC’s possess a membrane bound nucleus?
False: RBC’s DO NOT have a nucleus
What is the purpose of sympathetic nerves?
They innervate the body’s “fight or flight” fxns
