1. Dismiss Notice
  2. Guest, be sure to check out How To Get Into Dental School, our free downloadable PDF with step-by-step details for dental school applicants!
    Dismiss Notice
  3. Dismiss Notice
  4. Download free Tapatalk for iPhone or Tapatalk for Android for your phone and follow the SDN forums with push notifications.
    Dismiss Notice

Take this test part 2

Discussion in 'DAT Discussions' started by osimsDDS, Jun 13, 2008.

  1. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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*
     
  2. Note: SDN Members do not see this ad.

  3. pistolpete007

    2+ Year Member

    Joined:
    May 18, 2008
    Messages:
    318
    Likes Received:
    0
    Status:
    Pre-Dental
    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*
     
  4. Zerconia2921

    Zerconia2921 Bring your A-game!
    2+ Year Member

    Joined:
    Mar 24, 2008
    Messages:
    207
    Likes Received:
    0
    Status:
    Pre-Pharmacy
    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
     
  5. bumpski20

    2+ Year Member

    Joined:
    Sep 2, 2007
    Messages:
    125
    Likes Received:
    0
    Status:
    Pre-Dental
    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? :rolleyes:
     
  6. doc toothache

    10+ Year Member

    Joined:
    Jan 17, 2006
    Messages:
    8,050
    Likes Received:
    2,183
    Status:
    Dentist
    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
    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
     
    #5 doc toothache, Jun 14, 2008
    Last edited: Jun 16, 2008
  7. 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.
     
  8. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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
     
  9. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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
     
    #8 osimsDDS, Jun 14, 2008
    Last edited: Jun 14, 2008
  10. bumpski20

    2+ Year Member

    Joined:
    Sep 2, 2007
    Messages:
    125
    Likes Received:
    0
    Status:
    Pre-Dental
    nice test :thumbup: very tricky! btw when are you taking the DAT? it seems like you can go in 2mrw and beast it.
     
  11. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    mid july, haha no way i suck at Math and I havent even started studying for ochem yet...
     
  12. pistolpete007

    2+ Year Member

    Joined:
    May 18, 2008
    Messages:
    318
    Likes Received:
    0
    Status:
    Pre-Dental
    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?




     
  13. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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...
     
  14. wkawk2416

    7+ Year Member

    Joined:
    Mar 14, 2007
    Messages:
    229
    Likes Received:
    0
    Status:
    Dental Student
    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?
     
  15. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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
     
  16. wkawk2416

    7+ Year Member

    Joined:
    Mar 14, 2007
    Messages:
    229
    Likes Received:
    0
    Status:
    Dental Student
    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.
     
  17. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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
     
  18. wkawk2416

    7+ Year Member

    Joined:
    Mar 14, 2007
    Messages:
    229
    Likes Received:
    0
    Status:
    Dental Student
    yeah, last one is hard, i stopped doing that after number 15.
     
  19. It is also important to know that gymnosperms spread their seeds through fire, as well as wind.
     
  20. pistolpete007

    2+ Year Member

    Joined:
    May 18, 2008
    Messages:
    318
    Likes Received:
    0
    Status:
    Pre-Dental
    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?
     
  21. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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...
     
  22. rooney09

    rooney09 sardines in the sea
    7+ Year Member

    Joined:
    Dec 26, 2005
    Messages:
    57
    Likes Received:
    0
    Status:
    Dental Student
    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!
     
  23. mlv2148

    Joined:
    Apr 23, 2008
    Messages:
    6
    Likes Received:
    0
    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?
     
  24. osimsDDS

    5+ Year Member

    Joined:
    Jun 8, 2007
    Messages:
    925
    Likes Received:
    2
    Status:
    Pre-Dental
    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...
     
  25. mlv2148

    Joined:
    Apr 23, 2008
    Messages:
    6
    Likes Received:
    0
    I meant explanation with regards to doing the question, sorry, forgot to clarify. Is your answer or doc toothaches right?
     
  26. doc toothache

    10+ Year Member

    Joined:
    Jan 17, 2006
    Messages:
    8,050
    Likes Received:
    2,183
    Status:
    Dentist
    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
     
    #25 doc toothache, Jun 16, 2008
    Last edited: Jun 16, 2008
  27. doc toothache

    10+ Year Member

    Joined:
    Jan 17, 2006
    Messages:
    8,050
    Likes Received:
    2,183
    Status:
    Dentist
    It would help if the questions/answer choice were written correctly.


    Let us hope the DAT testmakers do not have the same sense of humor.
     
    #26 doc toothache, Jun 16, 2008
    Last edited: Jun 17, 2008

Share This Page