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Answer then ask a question.
Question 1:
What type of solvent would be best for favoring Sn1?
Question 1:
What type of solvent would be best for favoring Sn1?
Originally posted by Cerberus
Question 1:
What type of solvent would be best for favoring Sn1?
Originally posted by Cerberus
Answer then ask a question.
Question 1:
What type of solvent would be best for favoring Sn1?
Originally posted by LUBDUBB
Ok, let's play...
Polar protic solvents tend to stabilize the carbocation intermediate, increasing the rate of reaction.
Question 2:
Which one is more soluble in water, Oxygen or Carbon dioxide, and why?
Originally posted by farleyisgod
polar protic.
3:
What's the difference in total ATP production from a molecule of glucose between prokaryotes and eukaryotes?
Originally posted by Cerberus
This is just a guess but I am going to guess that it is CO2 because CO2+H2O <-> H2CO3<->H+ + HCO3-
A defect in nervous system formation could most likely be attributed to a defect in which germ layer?
Originally posted by farleyisgod
What's the difference in total ATP production from a molecule of glucose between prokaryotes and eukaryotes?
Originally posted by farleyisgod
the ectoderm gives rise to the nervous system.
hmm...
reduction of a ketone to an alcohol will be marked by an appearance of ______ and disappearance of ______ on an IR spectrum.
Originally posted by Nuel
dissappearance of carbonyl stretch at approx. 1700cm-1 and and appearance of OH stretch at 3500cm-1. this was too easy. the question on bacterial vs. eukaryotic oxidative respiration was more interesting.
Originally posted by Nuel
In response to cerb:
What is the sufficient condition for chirality?
Originally posted by sdnstud
4 different substituents attached to a sp3 atom
Originally posted by sdnstud
how does an increase in temperature affect the tone played on the piano?
Originally posted by Nuel
Your answer is wrong. An sp3 chiral center is only a necessary condition for chirality, not sufficient.
Originally posted by jhk43
thats a cheapie!
if a fetus lacks just testosterone receptor, but has an XY genotype, what is its internal (m or f or none) and external (m or f or none) genitalia?
Originally posted by Nuel
No difference is expected. Bacterial plasma membrane performs the same function as mitochondria.
Originally posted by Cerberus
This is just a guess but I am going to guess that it is CO2 because CO2+H2O <-> H2CO3<->H+ + HCO3-
Originally posted by jhk43
thats a cheapie!
if a fetus lacks just testosterone receptor, but has an XY genotype, what is its internal (m or f or none) and external (m or f or none) genitalia?
Originally posted by LUBDUBB
36 for eukaryotes, 38 for prokaryotes.
In Eukaryotes, the two NADH made in glycolysis must be passed across the mitochondrial membrane actively. This yields 2 ATP per NADH for a total of 4 ATP, instead of 3 atp per NADH as is expected of the NADH generated in the mitochondria.
In prokaryotes, because the two NADH do not have to cross any mitochondrial membrane, they yield 3 atp per NADH.
Originally posted by DrSal
If the fetus lacks testoesterone receptors it will have female genitalia (external and internal, perhaps underdevelopped) and will be sterile...cuz it'll be almost equivalent to XO and will develop by default as female b/c the testerone isn't sensed.
Ok, here's a rather lengthy Q
Who can explain beat frequencies, harmonics and all that jazz?
Originally posted by DrSal
If the fetus lacks testoesterone receptors it will have female genitalia (external and internal, perhaps underdevelopped) and will be sterile...cuz it'll be almost equivalent to XO and will develop by default as female b/c the testerone isn't sensed.
Ok, here's a rather lengthy Q
Who can explain beat frequencies, harmonics and all that jazz?
Originally posted by DrSal
If the fetus lacks testoesterone receptors it will have female genitalia (external and internal, perhaps underdevelopped) and will be sterile...cuz it'll be almost equivalent to XO and will develop by default as female b/c the testerone isn't sensed.
Originally posted by Nuel
I knew someone was to comment on this. I wanted to add to this but desisted.
The eukaryotic yield is theoretically 36 or 38 ATP depending at what level NADH will deliver its electrons on the ETC. Even this is contested among scientists. MCAT won't test this detail.
Originally posted by LUBDUBB
No testosterone --> no wolffian ducts --> no internal male genitals.
If the testis still produce MIS, then Mullerian system (internal female genitalia) are also inhibited.
As for external genitalia, if no testosterone, then xy will develop into incomplete female.
Hope I'm right.
Originally posted by krull
Q: If a rocket take off at an initial velocity of 100 m/s, 75 degrees of the horizontal, and its engine stops working after 11 seconds, what is the maximum height the rocket achieves? (had a similar problem like this on real deal last year :O)
Originally posted by krull
Here is another one I had.
What is the length constant found in cells due to a local depolarization?
Originally posted by krull
Q: If a rocket take off at an initial velocity of 100 m/s, 75 degrees of the horizontal, and its engine stops working after 11 seconds, what is the maximum height the rocket achieves? (had a similar problem like this on real deal last year :O)
Originally posted by Cerberus
My guess is this, in the first 11 seconds the acceration due to gravity can be neglected due to the engine.
So
y=11*sin75*100
y=1062
then after that point,
v^2=v^2(initial)+2ad
0=(sin75*100)^2-2*10*y
y=466
So the total distance achieved is
1062+466 = 1528m
Originally posted by krull
heh, never heard of the length constant? That's the length a typical conductance length a local response in cells typically has
Originally posted by sdnstud
Nope...never heard of it...
Q: which requires a greater escape velocity (to escape earth)? when rocket is launched at the equator, north pole or somewhere in between?
This was on the actual mcat i took 2 years back
Originally posted by jhk43
Consider the rxn between an Ester and NaOH. Will the reaction favor nuc. substitution (COOH) or aldol addition/condensation? what about between ketone and NaOH? What about Acid Chloride and NaOH?
Originally posted by krull
A) nuc sub?
B) aldol addition
c) nuc sub
Q: This was a wierd one I had. Easy but weird. If an object is traveling a 100,000 m/s and it emits a flash of light which travels at a velocity of 186,000 m/s, what is the speed of the particle within the flash of light? (something similar to this)
Originally posted by jhk43
Consider the rxn between an Ester and NaOH. Will the reaction favor nuc. substitution (COOH) or aldol addition/condensation? what about between ketone and NaOH? What about Acid Chloride and NaOH?
Originally posted by LUBDUBB
Ester +NaOH is a saponification (base catalyzed hydrolysis)
R-COOR' + NaOH --> R--0-:Na+
Acid Chlroide + NaOH will hydrolzye the acid chloride back to the carboxylic acid.
Ketone + NaOH ...hmmmmm..well adding NaOH to an aldehyde/ketone forms the enolate ion. Now if we've got an aldehyde we can have an aldol condensation. I guess the Ketone will also undergo aldol condesation but the eq concentrations will be minimal.
Originally posted by jhk43
NaOH + Aldehyde/Ketone, does it ever form a COOH via substution? or just aldol addition?
Originally posted by jhk43
E1 vs. Sn1. in which conditions does E1 win? Sn1 win?
Originally posted by jhk43
i believe Radius is max at the equator, min at the N pole..
F=GMm/R^2
g~M/R^2
since g~1/R^2, g is max at smaller radius, so escape velocity max @ north pole?
Okay, here's one:
If you are farsighted then your _____ point is too ______. You fix with a _________ lens.
If you are nearsighted, your ________point is too _______, and you fix it with a ________ lens.
Bonus: What is the sign of the power of the lens you use to fix each problem, respectively? [/B]
Originally posted by Persistence101
According to EK, elimination occurs when the nucleophile acts like a base. To avoid this, use a less bulky base.