SDN members see fewer ads and full resolution images. Join our non-profit community!

mRNA reading...

Discussion in 'MCAT Study Question Q&A' started by sps27, May 20, 2014.

  1. sps27

    sps27 5+ Year Member

    Sep 1, 2012
    Which statement regarding protein synthesis is false?

    A. tRNA molecules shuttle amino acids that are incorporated into the protein.
    B. tRNA molecules have the amino acid bound to the 3' end of the molecule.
    C. The process does not require energy.
    D. Ribosomal RNA is needed for proper binding of the mRNA message.
    E. The message is read from the 5' end to the 3' end.

    So I missed this Kaplan discreet. I thought that there were 2 false answers. I know for sure that the process requires energy and I also thought that mRNA is read in 3' to 5' direction (one codon at a time) and proteins are synthesized in 5' to 3' direction. Researching a bit on the Internet I found that the mRNA codon is read in the 5' to 3' direction. And since Proteins are also synthesized in the 5' to 3' direction, so is it true that basically both the reading of the mRNA codon and synthesizing of proteins take place in 5' to 3' direction ?
  2. SDN Members don't see this ad. About the ads.
  3. tdod

    tdod 5+ Year Member

    Oct 30, 2011
    You have unnecessarily confused yourself. You said yourself that you know that "the process requires energy." Therefore, the correct answer choice, which is the FALSE answer choice, is C.
  4. dyspareunia


    Mar 6, 2014
    mRNA is read 5' to 3'. Proteins are synthesized starting at the N-terminus.
  5. sps27

    sps27 5+ Year Member

    Sep 1, 2012
    Thanks guys. I appreciate it. Yes you are correct. I got confused unnecessarily by the 5' to 3' issue. I thought that mRNA is read in 3' to 5' and that was my mistake.....

Share This Page