DNA (Deoxyribonucleic Acid) by Lori McBride https://padlet.com/lori_mcbride/ng5xy6asutof Made with panache en-us 2018-01-24 17:50:14 UTC 2025-12-18 12:35:38 UTC hello@padlet.com A. DNA instructs cells on which types of protein molecules to make. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224354558 Proteins are important for building blocks and controlling metabolism.]]> 2018-01-24 18:00:12 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224354558 B. DNA is found on chromosomes and contains thousands of genes, which determine how traits are expressed. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224355887 2018-01-24 18:02:20 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224355887 C. DNA's Structure lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224357320 DNA is a "double helix"; it resembles a twisted ladder.

The sides of the ladder are made of alternating sugars and phosphates; the steps are made of nitrogen bases.]]> 2018-01-24 18:04:55 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/224357320 E. A nucleotide is a subunit of DNA that consists of a sugar, a phosphate, and a base. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225158198 2018-01-26 17:39:14 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225158198 F. A gene is a long strand of nucleotides. A gene contains the code for a whole protein molecule. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225159408 one gene = one protein]]> 2018-01-26 17:42:21 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225159408 G. Rosalind Franklin was the first to discover DNA's spiral shape using x-ray diffraction. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225160886 2018-01-26 17:45:55 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225160886 D. The bases GUANINE and CYTOSINE pair together, and ADENINE and THYMINE pair together. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225161497 GCAT]]> 2018-01-26 17:47:26 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225161497 H. Erwin Chargaff discovered which bases pair together - known as Chargaff's Rules. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225164579 2018-01-26 17:53:51 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225164579 I. James Watson and Francis Crick were the first to build a model of DNA in the 1950's. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225165381 2018-01-26 17:55:35 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225165381 J. DNA must make copies of itself, or replicate, before a cell reproduces. This ensures that the new "daughter" cells have the right amount. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225166051 2018-01-26 17:57:06 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225166051 K. To replicate, DNA "unzips" and free nucleotides in the nucleus come and pair with the "dangling" nucleotides, forming 2 new strands. lori_mcbride https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225168505 2018-01-26 18:01:31 UTC https://padlet.com/lori_mcbride/ng5xy6asutof/wish/225168505