DNA by Muneera Ali Kanoo https://padlet.com/m_kanoo_2163/xi5hr6pczlip Muneera, Lulwa, Daniah, Mariam M en-us 2019-04-15 05:40:19 UTC 2024-12-14 16:05:28 UTC hello@padlet.com https://imgglb.padletcdn.com/v13/image?t=g_auto&url=https%3A%2F%2Fpadlet.net%2Ficons%2Fpng%2F1f9ec.png What is DNA? m_almaskati_2160 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568611 DNA stores and transmits genetic information from one generation of living things to the next.


]]> 2019-04-15 05:56:47 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568611 Structure of DNA m_almaskati_2160 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568820 The structure of DNA includes Nucleotides joined into long strands to make up nucleic acids. The structure consists of a Phosphate group, deoxyribose (5-carbon sugar), and a nitrogenous base (Adenine, Thymine, Guanine, or Cytosine).]]> 2019-04-15 05:58:11 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568820 Role of DNA in heredity d_alaali_2122 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568932 The DNA that makes up genes must be able to store, copy, and transmit the genetic information in a cell.

]]> 2019-04-15 05:59:11 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351568932 The Double Helix Model d_alaali_2122 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569359 - Two strands are anti-parallel.
- The nitrogen bases on both strands are in contact.
- Hydrogen bonds are between the nitrogen bases.
- Adenine pairs with Thymine and Guanine pairs with Cytosine.]]> 2019-04-15 06:03:39 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569359 DNA Timeline m_kanoo_2163 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569587 1866
Gregor Mendel published the results of his investigations of the inheritance of "factors" in pea plants.

1869
Friedrich Miescher discovers "nuclein" in the pus of discarded surgical bandages.

1952
Rosalind Franklin & Raymond Gosling produce single X-ray diffraction image.

1953
James Watson & Francis Crick suggest the first correct double-helix model of DNA structure.

1958 
Meselson-Stahl experiment confirms replication mechanism as implied by the double-helical structure.
]]> 2019-04-15 06:05:52 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569587 CHARGAFF’S RULE d_alaali_2122 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569671 Chargaff discovered that the percentages of Adenine [A] and Thymine [T] bases are equal in a sample of DNA and the same was true for Guanine [G] and Cytosine [C]]]> 2019-04-15 06:06:43 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569671 What did Watson and Crick do? d_alaali_2122 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569991 - Used Rosalind Franklin's notes to build a 3D model of the molecule, taking advantage of her work.
- They were not able to explain DNA's properties.]]> 2019-04-15 06:09:59 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351569991 Who is Roslind Franklin l_almansoori_2161 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351570043 - Started studying DNA in 1950.
- She purified DNA then stretched the fibers in a thin tube so that most of the strands were parallel.
- Aimed an X-ray beam at DNA and recorded the scattering pattern X- shaped pattern shows that DNA is twisted around each other like coils of a spring (Helix) ]]> 2019-04-15 06:10:19 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351570043 m_kanoo_2163 https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351570567 2019-04-15 06:16:09 UTC https://padlet.com/m_kanoo_2163/xi5hr6pczlip/wish/351570567