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  • #25884

    Nicolas Sanchez

    Which of the following statements is/are correct for a healthy human?

    1 A protein section coded for by part of a gene consisting of 500 base pairs will have a
    maximum of 166 amino acids.
    2 A liver cell and a mature red blood cell from the same person will both have a chromosome number of 46.
    3 The number of adenine bases in an allele must be the same as the number of guanine bases.

    A. none of them
    B. 1 only
    C. 2 only
    D. 3 only
    E. 1 and 2 only
    F. 1 and 3 only
    G. 2 and 3 only
    H. 1, 2 and 3

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  • BMAT 2019 Section 2 Q21

  • Paris

    July 21, 2021 at 5:42 pm
    Down Accepted answer

    1. Each amino acid is coded by three bases. Therefore, we can divide 500 by 3 to see if 166 is the closest round result, and it is. This is correct.

    2. Mature RBCs have no nucleus. So there are no chromosomes. So, false.

    3. Adenine forms bonds with thymine. Not guanine. Guanine forms bonds with cysteine. This is false.

    The answer is A.