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  1. #1
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    Why is it that RNA can catalyze reactions but DNA cannot? --- HELP A,B,C, or D

    Why is it that RNA can catalyze reactions but DNA cannot?


    A. The bases of RNA are much more reactive than the bases of DNA.
    B. The RNA has a secondary structure but DNA does not
    C. RNA can assume complex tertiary structures but DNA cannot.
    D. The phosphate groups of RNA are much more reactive than the phosphate groups of DNA.
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  2. #2
    Registered User iron_monster's Avatar
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    C is the answer
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  3. #3
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    Originally Posted by iron_monster View Post
    C is the answer
    Why?
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    Originally Posted by Biblical_Death View Post
    Why?
    because DNA can only fold into a secondary structure.
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    Wow, this is a bull**** question if I ever saw one. They're all arguable. It's not A because the bases of DNA and RNA are the same (except the interchange of uracil and thymine - which there's nothign exceptionally reactive about either). DNA and RNA both have secondary and tertiary structure. And the phosphate groups of RNA and DNA are the same.

    I'm guessing your teacher is a stupid twat CC professor, so in that case I would definitely go with B (secondary structure) since RNA has more possible arrangements of secondary structure than DNA.
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  7. #7
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    Ok Im getting several responses, this is due in a little while. Can someone please clear this up and refute what the others are saying.
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    i thought it was because RNA is way less stable than DNA
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    D is the answer, most enzymes rely on phosphate for energy
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  10. #10
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    :/ help
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    Originally Posted by Biblical_Death View Post
    Ok Im getting several responses, this is due in a little while. Can someone please clear this up and refute what the others are saying.
    After consideration, go with C
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  12. #12
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    is this one of those 'pick the least wrong' or 'pick the most correct' answer?
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  13. #13
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    its C
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  14. #14
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    RNA IS more reactive than DNA since it has a hydroxyl group, an OH on the 2' carbon whereas DNA only has an H on the 2' carbon. BUT I'm not sure if that's why RNA can catalyze reactions in comparison to DNA

    edited: I meant to put H on the 2' carbon not O hence the name DEoxyribose so DNA only has an H whereas RNA has an OH
    Last edited by lefizzet; 09-24-2012 at 09:05 PM.
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    my gut instinct tells me d
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  16. #16
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    Originally Posted by Biblical_Death View Post
    Why is it that RNA can catalyze reactions but DNA cannot?


    A. The bases of RNA are much more reactive than the bases of DNA.
    B. The RNA has a secondary structure but DNA does not
    C. RNA can assume complex tertiary structures but DNA cannot.
    D. The phosphate groups of RNA are much more reactive than the phosphate groups of DNA.
    Alrite, molecular biology graduate here.

    A. Nope, share 3/4 of the same bases (DNA has A,G,T,C while RNA has A,G,U,C)
    B. Nope, Both assume secondary structures (A-Helix/B-Sheet are examples of DNA secondary)
    C. Nope, DNA can assume secondary, tertiary, and quartenary structures
    D. Most likely yes, b/c DNA has a phosphate backbone which is unreactive
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  17. #17
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    Answer is A. RNA is much more unstable then DNA - DNA = deoxyribonucleic Acid and is missing the oxygen at the 3' carbon which is replaced by a hydrogen therefore can't participate in many reactions. This is why DNA is our permanent genetic material because its relatively nonreactive. RNA on the other hand is Ribonucleic Acid and has and OH on both carbons 3 and 6. These OH's can particpate in many reactions. They can also form hydrogen bonds and stabilzie structures for chemical reactions in Enzymes.

    B is wrong - they both have secondary structures. C is wrong - DNA has a teritary structure - the double helix - RNA usually doesn't. D is wrong - the phosphate groups are the exact same. Also RNA and DNA do not have the same bases even RNA has ribonucelotides and DNA has deoxyribonucleotides. Second year Medical student here.
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    Originally Posted by lefizzet View Post
    RNA IS more reactive than DNA since it has a hydroxyl group, an OH on the 2' carbon whereas DNA only has an O on the 2' carbon. BUT I'm not sure if that's why RNA can catalyze reactions in comparison to DNA
    The right answer, but not one of the options.
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    Originally Posted by NikoBello View Post
    Answer is A. RNA is much more unstable then DNA - DNA = deoxyribonucleic Acid and is missing the oxygen at the 3' carbon which is replaced by a hydrogen therefore can't participate in many reactions. This is why DNA is our permanent genetic material because its relatively nonreactive. RNA on the other hand is Ribonucleic Acid and has and OH on both carbons 3 and 6. These OH's can particpate in many reactions. They can also form hydrogen bonds and stabilzie structures for chemical reactions in Enzymes.

    B is wrong - they both have secondary structures. C is wrong - DNA has a teritary structure - the double helix - RNA usually doesn't. D is wrong - the phosphate groups are the exact same. Also RNA and DNA do not have the same bases even RNA has ribonucelotides and DNA has deoxyribonucleotides. Second year Medical student here.
    Do you even base (answer doesn't say anything about the ribose - ribose does not equal base)?
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    It's D because RNA's 2nd and 3rd carbon each have oxygen, while DNA's 3rd carbon only has oxygen. Oxygen is used to make phosphodiester bonds.
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    None of thoes are right ansewers. Email your teacher before its due.
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    Originally Posted by DFINC View Post
    It's D because RNA's 2nd and 3rd carbon each have oxygen, while DNA's 3rd carbon only has oxygen. Oxygen is used to make phosphodiester bonds.
    Do you see any mother lovin, dick suckin difference between the phosphates, holmes?

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    Originally Posted by Biblical_Death View Post
    Why is it that RNA can catalyze reactions but DNA cannot?
    lolwut?

    Why is it that cats are psychic, but dogs are not?:

    A. Rainbows.
    B. Cthulhu.
    C. Aliens.
    D. Sasquatch.

    The answer is obviously A. rainbows, as none of the others are real.
    I am not no religious bastard and shyt.

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    Originally Posted by JigglyWhip View Post
    Do you even base (answer doesn't say anything about the ribose - ribose does not equal base)?
    Idiot Ribose is the name of the sugar in RNA and DNA hence the names Ribo - nucleic acid.
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    Originally Posted by ec2690 View Post
    Alrite, molecular biology graduate here.

    A. Nope, share 3/4 of the same bases (DNA has A,G,T,C while RNA has A,G,U,C)
    B. Nope, Both assume secondary structures (A-Helix/B-Sheet are examples of DNA secondary)
    C. Nope, DNA can assume secondary, tertiary, and quartenary structures
    D. Most likely yes, b/c DNA has a phosphate backbone which is unreactive
    SRS brah? A. They don't share the same bases because DNA does not have the OH on the 3' OH therefore not ribose as the sugar but deoxy ribose this is true for A, C, G, ect...B. Alpha helix and Beta sheet a protein structures.
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    Lift, Lust, Lulz ec2690's Avatar
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    Originally Posted by NikoBello View Post
    SRS brah? A. They don't share the same bases because DNA does not have the OH on the 3' OH therefore not ribose as the sugar but deoxy ribose this is true for A, C, G, ect...B. Alpha helix and Beta sheet a protein structures.
    that doesn't have anything to do with the bases, yes DNA doesn't have a hydroxyl group but they still bind 3/4 of the same bases (Adenine, Guanine, Cytosine, Thymine/Uracil)
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    Op, what level is this course? This will help in figuring out what the most suitable answers is.


    If it isn't a 400 level course, I imagine your prof would be thinking that C is the correct answer, so go with that one. (Although DNA catalysis does occur with DNA ribyozymes, but this is relatively new; mid to late 90s discovery).
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    Originally Posted by NikoBello View Post
    Idiot Ribose is the name of the sugar in RNA and DNA hence the names Ribo - nucleic acid.
    Bro, don't phuck with me at my game



    No **** ribose is the sugar, but none of the answers have anything to do with ribose/sugar - so obviously that can't be the answer. Ya dig?
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    Originally Posted by NikoBello View Post
    SRS brah? A. They don't share the same bases because DNA does not have the OH on the 3' OH therefore not ribose as the sugar but deoxy ribose this is true for A, C, G, ect...B. Alpha helix and Beta sheet a protein structures.
    I doubt the question is referring to 'base sugar'. It's most likely referring to nucleobases.

    And ^^^lol
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