Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    7
    ReputationRep:
    okay so I have some biology HW and I'm just really stuck on this question. I don't know if I'm over thinking it but idk

    the Question is:
    The sequence of bases on a piece of mRNA was:

    mRNA AUGGUAGUGCAUCUUUGA

    What would have been the sequence of bases on the,
    1 - DNA template strand
    2 -on the non-coding cDNA strand
    3-the sequence of tRNA anticodons
    4-the final amino acid sequence

    It also comes with a table of what a triploid of bases would be. IDK how to explain it.Attachment 699716


    Normally I would just leave it blank and fill it in in class once I understand it, but my new teacher has a rule that if you leave a question blank, you get minus the marks, so if I leave it blank ill get -4 marks. like its good to catch out the lazy students but he's not a very approachable guy and tends to set work for the next day so it's hard to talk to him if I have a problem. Because of this stupid rule, I have been getting minus marks in HW tests and now I'm just desperate not to do that again.
    Offline

    16
    ReputationRep:
    (Original post by atomicplaty)
    okay so i have some biology hw and i'm just really stuck on this question. I don't know if i'm over thinking it but idk

    the question is:
    The sequence of bases on a piece of mrna was:

    Mrna augguagugcaucuuuga

    what would have been the sequence of bases on the,
    1 - dna template strand
    2 -on the non-coding cdna strand
    3-the sequence of trna anticodons
    4-the final amino acid sequence

    it also comes with a table of what a triploid of bases would be. Idk how to explain it.Attachment 699716


    normally i would just leave it blank and fill it in in class once i understand it, but my new teacher has a rule that if you leave a question blank, you get minus the marks, so if i leave it blank ill get -4 marks. Like its good to catch out the lazy students but he's not a very approachable guy and tends to set work for the next day so it's hard to talk to him if i have a problem. Because of this stupid rule, i have been getting minus marks in hw tests and now i'm just desperate not to do that again.
    2/3)taccatcatgtagaaact
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    17
    ReputationRep:
    1) ATGGTAGTGCATCTTTGA (because the whole reason the coding DNA strand is called the 'template strand' is that the mRNA sequence is identical to it, other than the Thymine in the case of mRNA which is swapped for Uracil)
    2) TACCATCACGTAGAAACT (the non-coding strand must be complementary to the coding strand)
    3) TACCATCACGTAGAAACT (the tRNA sequence must be complementary to the mRNA strand)
    4) Unsure but if I had to guess I'd say TGA...
    Offline

    17
    ReputationRep:
    (Original post by "RED")
    1) taccatcatgtagaaact
    This is a common mistake to make - the sequence you've given is that of the non-coding DNA strand. You need to rememeber that mRNA and the coding DNA strand (template strand as OP has called it) have the same sequence other than the Uracilm which is replaced by Thymine in the DNA coding strand sequence.
    Offline

    16
    ReputationRep:
    It has 6 triploids
    Tac
    Cat
    Cat
    Gta
    Gaa
    Act

    I believe
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    16
    ReputationRep:
    (Original post by Wolfram Alpha)
    This is a common mistake to make - the sequence you've given is that of the non-coding DNA strand. You need to rememeber that mRNA and the coding DNA strand (template strand as OP has called it) have the same sequence other than the Uracilm which is replaced by Thymine in the DNA coding strand sequence.
    Oh yeah meant to put it for 2 and 3 sos 😂
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    7
    ReputationRep:
    omg thank you for the quick replies

    tbh i originally put the same as "RED" for no.1 but wasn't 100% so thanks for explaining it Wolfram Alpha

    thank you both!!!!!!!!
    Offline

    16
    ReputationRep:
    (Original post by AtomicPlaty)
    omg thank you for the quick replies

    tbh i originally put the same as "RED" for no.1 but wasn't 100% so thanks for explaining it Wolfram Alpha

    thank you both!!!!!!!!
    No problem- you're doing a-level right / AS?
    Posted on the TSR App. Download from Apple or Google Play
    Offline

    7
    ReputationRep:
    The others have already been answered but for Q4 I think they want you to translate the mRNA into amino acid using the table you're given.

    You should get:
    DNA: AUG-GUA-GUG-CAU-CUU-UGA
    which translates to
    AA: Start -Val-Val-His-Leu- Stop
    • Thread Starter
    Offline

    7
    ReputationRep:
    - yeah I'm in my second year

    - thanks lillydew
    Offline

    16
    ReputationRep:
    (Original post by AtomicPlaty)
    - yeah I'm in my second year

    - thanks lillydew
    I'm in first year but our teacher hasn't covered it yet I just tried using what I already knew from GCSE and some slight reading ahead 😂😊😎
    Posted on the TSR App. Download from Apple or Google Play
    • Thread Starter
    Offline

    7
    ReputationRep:
    oh gawd yes do that. i have so manny regrets from first year about not really revising anything at all.
    tbf im wasnt good at biology in the first place and everyone in my class are like doctor material so i got behind real quick because of the fast pace.
    good luck with everything though, with the way your already handling the subject, your gonna do well
    Offline

    11
    ReputationRep:
    (Original post by AtomicPlaty)
    okay so I have some biology HW and I'm just really stuck on this question. I don't know if I'm over thinking it but idk

    the Question is:
    The sequence of bases on a piece of mRNA was:

    mRNA AUGGUAGUGCAUCUUUGA

    What would have been the sequence of bases on the,
    1 - DNA template strand
    2 -on the non-coding cDNA strand
    3-the sequence of tRNA anticodons
    4-the final amino acid sequence

    It also comes with a table of what a triploid of bases would be. IDK how to explain it.Attachment 699716


    Normally I would just leave it blank and fill it in in class once I understand it, but my new teacher has a rule that if you leave a question blank, you get minus the marks, so if I leave it blank ill get -4 marks. like its good to catch out the lazy students but he's not a very approachable guy and tends to set work for the next day so it's hard to talk to him if I have a problem. Because of this stupid rule, I have been getting minus marks in HW tests and now I'm just desperate not to do that again.
    (Original post by Wolfram Alpha)
    This is a common mistake to make - the sequence you've given is that of the non-coding DNA strand. You need to rememeber that mRNA and the coding DNA strand (template strand as OP has called it) have the same sequence other than the Uracilm which is replaced by Thymine in the DNA coding strand sequence.
    The coding strand (or sense strand) is not the same as the template strand. The template strand refers to the non-coding strand (or antisense strand) which RNA polymerase II uses as a template to synthesise a complementary mRNA strand; the coding strand is exactly the same as the mRNA strand (except it contains thymine instead of uracil).
    Offline

    17
    ReputationRep:
    (Original post by Jpw1097)
    The coding strand (or sense strand) is not the same as the template strand. The template strand refers to the non-coding strand (or antisense strand) which RNA polymerase II uses as a template to synthesise a complementary mRNA strand; the coding strand is exactly the same as the mRNA strand (except it contains thymine instead of uracil).
    Ahhh I see, I had read somewhere that coding strand and template strand are the same thing but thanks for the calrification
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Will you be richer or poorer than your parents?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.