Find worked solutions for different exam papers, ask questions and connect with
medical aspirants and students from all over the world.

Home Forums Examen IMAT imat biology questions Répondre à: imat biology questions

  • Yuan Moshi

    mai 13, 2021 à 11:03
    0 Replies
    15570 XP
    Contributions: EnterMedSchool Donor
    Réputation: Niveau 4

    Hello, as you know, the answer is A, so look at P and Q, you’ll see the different base pair starting from 8th base pair (G-A).

    – If it is addtion type: in Q, it must be …GGGAT or GGAGT but it is GGAT => deletion type.

    – Because it is deletion type, so the nucleotide subsequence after 8th base pair are pushed forward, but you can see that the length of P and Q are the same => there is also addition type.

    – Then, you can see in 11th and 13th base of Q are different from P (after …ATT in P is CCCT whilst in Q is GCAT)

    + 11th base of Q is substitution (substition is replaced by a base of the same kind: G, C)

    * If 11th base of Q is addtion => it must be GCCT (!!!)

    + 13th base of Q is addtion as we mentioned above, and also there is ONLY ONE addtion type in Q (if there are two => the length of two is not the same)