Take this test part 2

osimsDDS · Jun 13, 2008

Ok so I am putting up some question for bio and maybe gchem, i will wait a lil longer to post the answers.

Ill start off easy:

What key hormone is produced by the corpus luteum after ovulation?
a) LH
b) FSH
c) estrogen
d) progesterone
e) GnRH

Which is the stronger base?
a) KBr
b) NaI
c) NaF
d) Na2S

What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

What hormone stimulates the production of FSH and LH when estrogen and progesterone levels are low in the blood?
a) Renin
b) Posterior Pituitary
c) Anterior Pituitary
d) HCG
e) GnRH

What is a difference between gymnosperms and angiosperms?
a) gymnosperms are fruit bearing
b) Angiosperms disperse their seeds via animals and the wind
c) gymnosperms disperse their seeds via animals and the wind
d) gymnosperms are gametophyte dominant
e) angiosperms are gametophyte dominant

Where do RBC develop in the fetus?
a) thymus
b) liver and spleen
c) bones consisting of the axial skeleton
d) bones consisting of the appendicular skeleton
e) kidney's

Where is red bone marrow found in an adult human?
a) bones of the appendicular skeleton
b) bones of the axial skeleton
c) femur bone
d) cranial bones
e) radius bone

Which are not vertebrates but are duterostomes?
a) Tunicates, planaria
b) Tunicates, Amphioxus
c) Tunicates, Roundworms

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

*no multiple choice for the last one just give answer*

pistolpete007 · Jun 14, 2008

Ok so I am putting up some question for bio and maybe gchem, i will wait a lil longer to post the answers.

Ill start off easy:

What key hormone is produced by the corpus luteum after ovulation?
a) LH
b) FSH
c) estrogen
d) progesterone
e) GnRH

Which is the stronger base?
a) KBr
b) NaI
c) NaF...not sure
d) Na2S

What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7 SOMEONE HELP ME WITH THESE KINDS OF PROBS. ARE THEY IN THE DESTROYER WHICH NUMBER IF SO?

What hormone stimulates the production of FSH and LH when estrogen and progesterone levels are low in the blood?
a) Renin--stimulates angiotensin 1--->angio. II--> prod aldosterone that increases the bloodpressure
b) Posterior Pituitary--adh and oxytocin
c) Anterior Pituitary---flat peg
d) HCG--something to do with prg
e) GnRH

What is a difference between gymnosperms and angiosperms?
a) gymnosperms are fruit bearing
b) Angiosperms disperse their seeds via animals and the wind
c) gymnosperms disperse their seeds via animals and the wind
d) gymnosperms are gametophyte dominant
e) angiosperms are gametophyte dominant

Where do RBC develop in the fetus?
a) thymus
b) liver and spleen
c) bones consisting of the axial skeleton
d) bones consisting of the appendicular skeleton
e) kidney's

Where is red bone marrow found in an adult human?
a) bones of the appendicular skeleton
b) bones of the axial skeleton
c) femur bone
d) cranial bones
e) radius bone

Which are not vertebrates but are duterostomes?
a) Tunicates, planaria
b) Tunicates, Amphioxus
c) Tunicates, Roundworms

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus not sure
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

All of the following are globular proteins except?
a) Hemoglobin---i wanna say this bc this has quant.structure rather than the tertiary of globular proteins
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

i more than likely got this wrong...bc i think this is a trick question, i this ksp part is excess info so i just did:

3L*0.75M*84.32 and i got 18.90grams

*no multiple choice for the last one just give answer*

Zerconia2921 · Jun 14, 2008

What key hormone is produced by the corpus luteum after ovulation?
a) LH
b) FSH
c) estrogen
d) progesterone
e) GnRH

Answer is D

Which is the stronger base?
a) KBr
b) NaI
c) NaF
d) Na2S

C

What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

MV = M2V2
V= M2V2/M
V = 3x50/.5 = 300ml

MiVi = MfVf
Mi = .5 M
Vi = x
Mf= 0.001
Vf= 300+x
solfe for x
x = (0.001(300+x))/.5
x = .3+.001x/5
x= 0.6
300+ .6 = 300.6 ml
answer E

What hormone stimulates the production of FSH and LH when estrogen and progesterone levels are low in the blood?
a) Renin
b) Posterior Pituitary
c) Anterior Pituitary
d) HCG
e) GnRH

Answer C

What is a difference between gymnosperms and angiosperms?
a) gymnosperms are fruit bearing
b) Angiosperms disperse their seeds via animals and the wind
c) gymnosperms disperse their seeds via animals and the wind
d) gymnosperms are gametophyte dominant
e) angiosperms are gametophyte dominant

Answer D

Where do RBC develop in the fetus?
a) thymus
b) liver and spleen
c) bones consisting of the axial skeleton
d) bones consisting of the appendicular skeleton
e) kidney's

Answer C ? not sure

Where is red bone marrow found in an adult human?
a) bones of the appendicular skeleton
b) bones of the axial skeleton
c) femur bone
d) cranial bones
e) radius bone

B ?

Which are not vertebrates but are duterostomes?
a) Tunicates, planaria
b) Tunicates, Amphioxus
c) Tunicates, Roundworms

C?

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

D

All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

?

How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

bumpski20 · Jun 14, 2008

What key hormone is produced by the corpus luteum after ovulation?
a) LH
b) FSH
c) estrogen
d) progesterone
e) GnRH

D

Which is the stronger base?
a) KBr
b) NaI
c) NaF
d) Na2S

D- A and B are conjugates of strong acids so def not those

What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

? still need to look up these questions

What hormone stimulates the production of FSH and LH when estrogen and progesterone levels are low in the blood?
a) Renin
b) Posterior Pituitary
c) Anterior Pituitary
d) HCG
e) GnRH

E- A stimulates aldasterone (spelling?) to increase salt which increases blood pressure. B and C are glands

What is a difference between gymnosperms and angiosperms?
a) gymnosperms are fruit bearing
b) Angiosperms disperse their seeds via animals and the wind
c) gymnosperms disperse their seeds via animals and the wind
d) gymnosperms are gametophyte dominant
e) angiosperms are gametophyte dominant

C

Where do RBC develop in the fetus?
a) thymus
b) liver and spleen
c) bones consisting of the axial skeleton
d) bones consisting of the appendicular skeleton
e) kidney's

A?

Where is red bone marrow found in an adult human?
a) bones of the appendicular skeleton
b) bones of the axial skeleton
c) femur bone
d) cranial bones
e) radius bone

A- contains long bones and long bones contain a marrow cavity in the diaphysis

Which are not vertebrates but are duterostomes?
a) Tunicates, planaria
b) Tunicates, Amphioxus
c) Tunicates, Roundworms

B? amphioxus are chordates but not vertebrates

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

D

All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

B? globular proteins act and carriers and enzymes

How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

this is tough...
1) 3L * 0.075M = .225 moles Mg(NO3)2 = .225 moles Mg
2) 0.225 moles Mg = 0.225 moles MgCO3?
3) 0.225 moles MgCO3 * 84.32 amu = 19ish g's?

doc toothache · Jun 14, 2008

osimsDDS said:
How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

*no multiple choice for the last one just give answer*

This is a common ion effect problem.
Total molar concentration of Mg+2 [from Mg(NO3)2] = 0.75
Then

[Mg+2][CO3-2]=4.0 x 10^-5
[CO3-2]=4.0 x 10^-5/0.075
[CO3-2]=5.33 x 10^-3
since [CO3-]=[MgCO3], then
g of MgCO3= (5.33 x 10^-4)(84.32)= 0.0449g.53/Liter
for 3 L = .0449 x 3= .1347

Zerconia2921 said:
What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

MV = M2V2
V= M2V2/M
V = 3x50/.5 = 300ml

MiVi = MfVf
Mi = .5 M
Vi = x
Mf= 0.001
Vf= 300+x
solfe for x
x = (0.001(300+x))/.5
x = .3+.001x/5
x= 0.6
300+ .6 = 300.6 ml
answer E

You could simply the calculations.

Since you need 300 ml of 0.001M solution and we have a 0.5 M HCl, then

M1V1=M2V2
(300)(0.001)=0.5V2
V2= 0.3/0.5=0.6ml

TexasDent · Jun 14, 2008

Hey OsimsDDS what are the answers here... I think the replies have some wrong answers, hope you can clear this up with all the correct ones.

osimsDDS · Jun 14, 2008

yea i will, if more people want to see the answers then ill post them up but im giving ppl time since last time i made a test ppl got frustrated that the answers were put up to early not giving ppl time to think and answer haha

osimsDDS · Jun 14, 2008

osimsDDS said:
Ok so I am putting up some question for bio and maybe gchem, i will wait a lil longer to post the answers.

Ill start off easy:

What key hormone is produced by the corpus luteum after ovulation?
a) LH
b) FSH
c) estrogen
d) progesterone
e) GnRH

Ans: D, also estrogen but not the key hormone, progesterone is the key hormone...the key word here is KEY haha

Which is the stronger base?
a) KBr
b) NaI
c) NaF
d) Na2S

Ans: D, these are all salts formed from either weak acids or strong acids, as we know weak acids give rise to strong conjugate bases but the trick is between choices C & D, NaF is the conj base of HF weak acid and so is Na2S which is HS^1-, so you just need to know which one is a weaker acid...and its HS^1- making choice D correct....

What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

I think I screwed up on this one, its supposed to be 250.6ml because you get 300.6 but you have to subtract 50ml of the NaOH, right???

What hormone stimulates the production of FSH and LH when estrogen and progesterone levels are low in the blood?
a) Renin
b) Posterior Pituitary
c) Anterior Pituitary
d) HCG
e) GnRH

Ans: E, GnRH from the Hypothalamus

What is a difference between gymnosperms and angiosperms?
a) gymnosperms are fruit bearing
b) Angiosperms disperse their seeds via animals and the wind
c) gymnosperms disperse their seeds via animals and the wind
d) gymnosperms are gametophyte dominant
e) angiosperms are gametophyte dominant

Ans: B, Gymnosperms are vascular plants like angiosperms but the main diff is that they disperse seeds via the wind...angiosperms are fruit bearing and disperse their seeds via animals and the wind...

Where do RBC develop in the fetus?
a) thymus
b) liver and spleen
c) bones consisting of the axial skeleton
d) bones consisting of the appendicular skeleton
e) kidney's

Ans: B

Where is red bone marrow found in an adult human?
a) bones of the appendicular skeleton
b) bones of the axial skeleton
c) femur bone
d) cranial bones
e) radius bone

Ans: B, just the axial skeletons...the rest of the bones have yellow bone marrow not red..

Which are not vertebrates but are duterostomes?
a) Tunicates, planaria
b) Tunicates, Amphioxus
c) Tunicates, Roundworms

Ans: B, easy one...also Lancelets are invertebrates

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

Ans: D, negative feedback via anterior pituitary which stops LH production...

All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

Ans: Its none of these, they are all globular proteins..haha

How many grams of magnesium carbonate (MgCO3) (MW= 84.32) will dissolve in 3 L of .075M Mg(NO3)2....ksp MgCO3 = 4.0x10^-5

*no multiple choice for the last one just give answer*

Ans: Common ion effect here, .13 g MgCO3 will dissolve...

MgCO3 -----> Mg2+ + CO3^2-

Mg CO3
Initial .075M 0M
Change +x +x
Equillibrium .075+x x

So basically Ksp of MgCO3= 4.0x10^-5 = [Mg][CO3]
4.0x10^-5 = [.075][x]
x= about 5x10^-4

Then easy stoicheometry to find grams of MgCO3 using L giving in problem...answer is 0.13g

bumpski20 · Jun 14, 2008

nice test

very tricky! btw when are you taking the DAT? it seems like you can go in 2mrw and beast it.

osimsDDS · Jun 14, 2008

mid july, haha no way i suck at Math and I havent even started studying for ochem yet...

pistolpete007 · Jun 14, 2008

Ans: Common ion effect here, .13 g MgCO3 will dissolve...

MgCO3 -----> Mg2+ + CO3^2-

Mg CO3
Initial .075M 0M
Change +x +x
Equillibrium .075+x x

So basically Ksp of MgCO3= 4.0x10^-5 = [Mg][CO3]
4.0x10^-5 = [.075][x]
x= about 5x10^-4

Then easy stoicheometry to find grams of MgCO3 using L giving in problem...answer is 0.13g
I DONT know about this one....all u got was the molar concentration of X which is equal to CO3 not MgCO3...so can u expalin why my thinking is wrong if i am wrong

also
Ans: B, Gymnosperms are vascular plants like angiosperms but the main diff is that they disperse seeds via the wind...angiosperms are fruit bearing and disperse their seeds via animals and the wind

are u basically saying gymnosperm can disperse seed only by wind whre as animal can by wind and animal?

osimsDDS · Jun 14, 2008

yea basically because they are cone bearing....its a protective mechanism against animals...so their seed are dispersed by wind...angiosperms think about bee's they carry pollen to other flowering plants...

wkawk2416 · Jun 14, 2008

osimDDS, nice test!

some are tricky which made me go thru cambell book again

Thanks alot man.

seems like we are on the same boat.

and i been studying for the DATs for about 1 month.

and how did you approach g chem section, I just did a sample test on ADA ( only g chem section). is test a lot like that or more information or difficult concepts?

osimsDDS · Jun 14, 2008

I have no idea how gchem is, ive been hearing its alot more conceptual but maybe someone who has taken the test recently can help us on that and hwat to study...ANYBODY OUT THERE???? HELP...thanks

wkawk2416 · Jun 14, 2008

lol, have you gone thru kaplan book?

i had no idea when i was on tht book and i missed about 90 percent of

the question on destroyer.

damn, and also kaplan subject tests kicked my ass.

dont' know what to do.

osimsDDS · Jun 14, 2008

yea ive gone through kaplan subject test for the class...the last one was hard but the first two i was getting 80% or so...they are tough

wkawk2416 · Jun 14, 2008

yeah, last one is hard, i stopped doing that after number 15.

TexasDent · Jun 14, 2008

It is also important to know that gymnosperms spread their seeds through fire, as well as wind.

pistolpete007 · Jun 15, 2008

An increase in estrogen by the corpus luteum inhibits which gland?
a) Medulla
b) Hypothalmus
c) posterior pituitary
d) anterior pituitary
e) Adrenal Cortex

ok i've read that High levels of estradiol inhibit the FSH stimujlating center of the hypothalmus.....so i know that FSH is secreted in the anterior pit. but the fsh releasing factor is made in the hypothalmus.....which goes to the ant. pit to tell them to release the fsh which causes a rise in the estrogen......so for negative feed back sys to work wouldnt it inhibit the hypothalmus?

osimsDDS · Jun 15, 2008

I think its one of those tricky questions where you have to think hard...yes a high rise in estrogen from the corpeus luteum stimulates the Hypothalmus to inhibit the anterior pituitary via a hormone sequence, BUT the gland that is being inhibited itself is the anterior pituitary...the hypothalmus isnt being inhibited its just used as an intermediary between anterior pituitary and the corpeus luteum, neg feedback manner...

rooney09 · Jun 16, 2008

All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

All of them are globular!? this must be a trick question because you can immediately eliminate A, D, E

B= antibodies= globular

and C I wikipedia-ed and is also globular!

mlv2148 · Jun 16, 2008

Can someone please common ion effect problems like this one. I do not have anything that I can find in Kaplan, my text book does not have an example like the problem here. Also, doc toothache and osimsDDS have two different ways and two different answers anyone mind explaining?

osimsDDS · Jun 16, 2008

ok, so common ion effect is when you have a solution of lets say MgCO3 and and your adding to the solution MgNO3, what is the common ion?? Mg of course...so the Ksp or solubility will decrease because you already have the same ions in solution...

mlv2148 · Jun 16, 2008

I meant explanation with regards to doing the question, sorry, forgot to clarify. Is your answer or doc toothaches right?

doc toothache · Jun 16, 2008

mlv2148 said:
I meant explanation with regards to doing the question, sorry, forgot to clarify. Is your answer or doc toothaches right?

0.13 is the correct answer. Calculations need to be done on the molar concentration of 0.075M and the answer multiplied by 3 for the 3 liters rather than multiplying the concentration of 0.075M by 3. The corrections were made in the post.

http://forums.studentdoctor.net/showpost.php?p=6783541&showpost=5

doc toothache · Jun 17, 2008

osimsDDS said:
What is the volume of .5M HCl if it is added to 50ml of 3M NaOH to make the solution pH=3?
a) 300.1ml
b) 500.1ml
c) 400.5ml
d) 300.3ml
e) 300.7

I think I screwed up on this one, its supposed to be 250.6ml because you get 300.6 but you have to subtract 50ml of the NaOH, right???

It would help if the questions/answer choice were written correctly.

osimsDDS said:
All of the following are globular proteins except?
a) Hemoglobin
b) immunoglobulins
c) Myoglobin
d) Alpha globulin
e) gamma globulin

Ans: Its none of these, they are all globular proteins..haha

Let us hope the DAT testmakers do not have the same sense of humor.

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