DNAReplicationNotes - Adenine(A pairs with...

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

View Full Document Right Arrow Icon
Replication of DNA DNA replication makes sure each daughter cell has the genetic  information it needs to carry out its activities! Rosalind Franklin used an X-Ray method to photograph DNA molecules,  and her photographs helped James Watson and Francis Crick figure out  the structure of DNA in 1953 DNA molecules look like a twisted ladder or spiral staircase The two side of the DNA ladder are made up of molecules of sugar called  deoxyribose and alternates with molecules of phosphates  (look at Figure  23 on page 101 in your textbook) Each rung is made up of a pair of molecules called  nitrogen bases Nitrogen Bases  – are molecules that contain the element nitrogen and  other elements DNA has 4 kinds of nitrogen bases: adenine (A), thymine (T), guanine  (G) and cytosine (C) The bases on one side of the ladder pair with bases on the other side
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.

Unformatted text preview: Adenine (A) pairs with Thymine (T) - - - - - (A) & (T) Guanine (G) pairs with Cytosine (C) - - - - - (G) & (C) The Replication Process: • DNA replication beings when the two sides of the DNA molecule unwind and separate, similar to a zipper unzipping – the molecules separate between the paired nitrogen bases • Nitrogen bases that are floating in the nucleus pair up with the bases on each half of the DNA molecule Each new DNA molecule exactly matches the order in the original DNA molecule because the way in which the nitrogen bases pair with one another - - A always with T - - - G always with C Once the new bases are attached, two new DNA molecules are formed!...
View Full 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