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Biology practice questions

Discussion in 'DAT Discussions' started by nt4reall, Jun 17, 2008.

  1. nt4reall

    nt4reall New Member

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    Now , it's my turn ,
    1) Gibberellins all of the following except which of the following :
    a) Rapid stem elongation
    b. Inhition of root growth
    c. Division in cells of the phloem
    d. Termination of dormancy of seeds and buds
    e. All of the anove are caused by gibberellins

    2)Which of the following is false of the anterior pituitary gland ?
    a. It is also called the adenohypophysis
    b. It does not realease oxytoxin or ADH
    c. It release of hormones is independent of any other organ or structure
    d. It is situated by the intermediate and posterior lobes
    e. Two of the above are false.

    3) Which of the following is a false statement about the process of blood clotting ?
    a. Platelets and damaged tissue release the clotting factor thromboplastin.
    b. Thromboplastin converts thrombin to prothrombin
    c. A vitain K defficiency would cause poor clotting.
    d. Fibrinogen is converted to fibrin
    e. Fibrin is insoluble in the blood , where as fibrinogen is blood soluble

    4) Which of the following statement is false ?
    a. Erythocytes are also called red blood cells, and don't conain any organelles
    b. Erythocytes utilize anaerobic respiration via the process of glycoglysis
    c. Erythocytes contain a nucleus and DNA
    d. Leukocytes have both a nucleus and organelles .
    e. Two of the above false

    5) WHich is true of protosomes?
    a. Protosomatic cells can differentiate into any type of blood cell
    b. Humans are protosomes
    c. THe head of a protosome develops from the blastospore
    d. The head of a protosome develops from the archenteron
    e. None of the above

    Which of the following is true concerning a sex linked disorder that is lethal in infancy ?
    a. Females are unable to carry the gene
    b. It will cause death in both males and females
    c. Make chidren of make carriers will be carriers
    d. It will cause death only in males

    Nucleotides are linked by :
    a. Hydrogen bonds
    b. Phosphodiester bonds
    c. Covalent bonds
    d. Vander waals bond
    e. Glycosidic bond

    How many ATP are produced from 2 molecules of glucose using only substrate phosphorylation ?
    a. 4
    b. 8
    c.36
    d.48
    e.40

    Enough for now , i will post answer and more questions later . Enjoy studying DAT.:)
     
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  3. osimsDDS

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    Nice test, dunno if i did well tho
     
  4. HoangDDS

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    I got all the same answers as osimsDDS. I wasn't sure about the gibberellins question though. I would've went with all of the above. After a quick check on wiki, I couldn't find any connection between gibberellins and phloem, so I think osimsDDS, you're right.

    Go Sharks! -maybe next year...again
     
  5. theedaddy77

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    yeah gibbernalls thingy also does stem elongation so it has to be E or a...
     
  6. TarheelKid24

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    From what I read in Schaum's, Gibberellins do all of the above. Auxins stimulate the production of Xylem.
     
  7. Glycogen

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    2)Which of the following is false of the anterior pituitary gland ?
    a. It is also called the adenohypophysis
    b. It does not realease oxytoxin or ADH
    c. It release of hormones is independent of any other organ or structure
    d. It is situated by the intermediate and posterior lobes
    e. Two of the above are false.

    I think this is not the case because AP is indirectly is under control of hypothalamus.This is what wiki says:

    Under the influence of the hypothalamus, the anterior pituitary produces and secretes several peptide hormones that regulate many physiological processes including stress, growth, and reproduction.

    I might be wrong but what about wiki!?
     
  8. Glycogen

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    The other thing,I read somewhere that RBC actually has mito and therefore DNA which will be inherited from mother!
    I don't know how this can be true since we know for sure RBC doesn't have any organelle!!
    Any explanation!
     
  9. osimsDDS

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    I just used my knowledge of menstraul cycle to figure this one out, since GnRH is produced by the hypothalamus and stimulates the anterior pituitary to secrete FSH or LH, then the anterior pituitary must be dependent on the hypothalamus...im not saying it is for every single hormone but it is at least for FSH and LH...so thats why its false because it is not independent, its dependent on the hypothalamus...hope that made sense
     
  10. DRHOYA

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    Now , it's my turn ,
    1) Gibberellins all of the following except which of the following :
    a) Rapid stem elongation
    b. Inhition of root growth
    c. Division in cells of the phloem
    d. Termination of dormancy of seeds and buds
    e. All of the anove are caused by gibberellins

    2)Which of the following is false of the anterior pituitary gland ?
    a. It is also called the adenohypophysis (never heard of this name??)
    b. It does not realease oxytoxin or ADH
    c. It release of hormones is independent of any other organ or structure
    d. It is situated by the intermediate and posterior lobes
    e. Two of the above are false.

    3) Which of the following is a false statement about the process of blood clotting ?
    a. Platelets and damaged tissue release the clotting factor thromboplastin.
    b. Thromboplastin converts thrombin to prothrombin
    c. A vitain K defficiency would cause poor clotting.
    d. Fibrinogen is converted to fibrin
    e. Fibrin is insoluble in the blood , where as fibrinogen is blood soluble

    4) Which of the following statement is false ?
    a. Erythocytes are also called red blood cells, and don't conain any organelles
    b. Erythocytes utilize anaerobic respiration via the process of glycoglysis
    c. Erythocytes contain a nucleus and DNA
    d. Leukocytes have both a nucleus and organelles .
    e. Two of the above false

    5) WHich is true of protosomes?
    a. Protosomatic cells can differentiate into any type of blood cell
    b. Humans are protosomes
    c. THe head of a protosome develops from the blastospore
    d. The head of a protosome develops from the archenteron
    e. None of the above

    Which of the following is true concerning a sex linked disorder that is lethal in infancy ?
    a. Females are unable to carry the gene
    b. It will cause death in both males and females
    c. Make chidren of make carriers will be carriers (??? what does this mean)
    d. It will cause death only in males

    Nucleotides are linked by :
    a. Hydrogen bonds
    b. Phosphodiester bonds
    c. Covalent bonds
    d. Vander waals bond
    e. Glycosidic bond

    How many ATP are produced from 2 molecules of glucose using only substrate phosphorylation ?
    a. 4
    b. 8
    c.36
    d.48
    e.40


    Pretty cool test, although I think your wording was difficult to understant. Also, the protostome question, should be referring to mouth and anus, not "head/tail". :thumbup: Post the answers man so we can check ourselves.
     
  11. wkawk2416

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    Now , it's my turn ,
    1) Gibberellins all of the following except which of the following :
    a) Rapid stem elongation
    b. Inhition of root growth
    c. Division in cells of the phloem
    d. Termination of dormancy of seeds and buds
    e. All of the anove are caused by gibberellins

    2)Which of the following is false of the anterior pituitary gland ?
    a. It is also called the adenohypophysis
    b. It does not realease oxytoxin or ADH
    c. It release of hormones is independent of any other organ or structure
    d. It is situated by the intermediate and posterior lobes
    e. Two of the above are false.

    3) Which of the following is a false statement about the process of blood clotting ?
    a. Platelets and damaged tissue release the clotting factor thromboplastin.
    b. Thromboplastin converts thrombin to prothrombin
    c. A vitain K defficiency would cause poor clotting.
    d. Fibrinogen is converted to fibrin
    e. Fibrin is insoluble in the blood , where as fibrinogen is blood soluble

    4) Which of the following statement is false ?
    a. Erythocytes are also called red blood cells, and don't conain any organelles
    b. Erythocytes utilize anaerobic respiration via the process of glycoglysis
    c. Erythocytes contain a nucleus and DNA
    d. Leukocytes have both a nucleus and organelles .
    e. Two of the above false

    5) WHich is true of protosomes?
    a. Protosomatic cells can differentiate into any type of blood cell
    b. Humans are protosomes
    c. THe head of a protosome develops from the blastospore
    d. The head of a protosome develops from the archenteron
    e. None of the above

    Which of the following is true concerning a sex linked disorder that is lethal in infancy ?
    a. Females are unable to carry the gene
    b. It will cause death in both males and females
    c. Make chidren of make carriers will be carriers
    d. It will cause death only in males

    Nucleotides are linked by :
    a. Hydrogen bonds
    b. Phosphodiester bonds
    c. Covalent bonds
    d. Vander waals bond
    e. Glycosidic bond

    How many ATP are produced from 2 molecules of glucose using only substrate phosphorylation ?
    a. 4
    b. 8
    c.36
    d.48
    e.40
     
  12. DRHOYA

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    Ahh crap, I forgot to count a few ATP's from the substrate level phorphorylation in Kreb's cycle before ETC.
     
  13. osimsDDS

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    also base linkage is hydrogen, nucleotide linkage is phosphodiester bond....glycosidic linkage is 2 sugars...
     
  14. nt4reall

    nt4reall New Member

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    U guys are so smart , most of you did good jobs.Thanks
     
  15. phungy

    phungy Account Terminated

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    Hmm..wiki says phosphodiester bonds are covalent bonds. A nucleotide is a nitrogenous base, a sugar, and a phosphate group. The backbone has phosphodiester bonds but the bases are held by hydrogen bonding. Bad question? :p
     
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  17. DRHOYA

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    yeah thats what I was thinking. I didn't even think on that question, just went right to H-bond. ?? Anyone else.
     
  18. sweetpea2

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    Yea i think nucleotides are definitely connected by phosphodiester bonds, this forms the backbone. THe bases, however, are held together by hydrogen bonds
     
  19. osimsDDS

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    1000000000000% sure nucleotides are connected by phosphodiester bonds, only the bases are connected via H-bonds...
     
  20. DRHOYA

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    Ok, so when say....C is bound to G in a triple bond and A to T in a double bond in DNA, those bonds are H-bonds. But the sugar-phosphate backbone is connected by phosphodiester bonds. Ok got it. Thanks so much!

    This is b/c the question said "nucleotides" and not the individual bases.
     
  21. Well you have to think about it... How could a male carry the allele(XY) if it is fatal...It would kill him before he could reproduce. So this means that the allele could only be passed on by the mother. So, a daughter could get one recessive allele from her mother but she would only get the normal dominant allele from her father and survive as a carrier.
    Great question though!
     
  22. wkawk2416

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    so, not only palelete or whatever

    but damaged tissue also produce components that are nessesary to clot the blood.

    wasn't sure about that
     
  23. theedaddy77

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    nucleotides is a whole unit therefore the units are connected by phosphodiester bond. NUCLEOSIDE notice it is different is just the the unit minus the phosphate therefore phosphdiester bond not possible therefore talking about hydrogen bonding......
     

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