113lecture1206 - BIOLOGY 113 MICROBIOLOGY Lecture 12...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
BIOLOGY 113 - MICROBIOLOGY Lecture 12: Microbial Genetics - RNA and protein synthesis, the genetic code Transcription can be defined as the synthesis of a complementary strand of RNA from a DNA template (Tortora Fig 8.8) - There are three kinds of RNA is cells. In order of abundance, these are = ribosomal RNA (rRNA) is an important structural and functional component of ribosomes, the site of protein synthesis = transfer RNA (tRNA) is the "adapter" molecule that links nucleotide base sequence to amino acid sequence = messenger RNA (mRNA) encodes proteins - Although we tend to think of mRNAs in discussing transcription (since they then go on to be translated), synthesis of rRNAs and tRNAs occurs by the same mechanism - Synthesis of RNA by transcription is very similar to leading strand synthesis of DNA during replication = Free ribonucleotides are added to a growing strand in a 5' to 3' direction = The identity of the nucleotides added is determined by base pairing with nucleotides in the DNA template strand = In RNA synthesis, uracil is added to a growing strand to pair with adenine, rather than thymine, which pairs with adenine in DNA -
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern