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Unlocking DNA: Exploring Structure, Blocks, and Replication

Dive deep into the world of DNA with this comprehensive review of its structure, building blocks, and replication processes. Discover how nucleotides form the basis of DNA, the double-stranded helix shape, and the intricate steps of DNA replication. Watch engaging video demonstrations and practice matching complementary strands. Unravel the mysteries of DNA with this informative resource.

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Unlocking DNA: Exploring Structure, Blocks, and Replication

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  1. All about DNA Structure, Building Blocks, and Replication

  2. DNA Structure-Review • REVIEW! • Which type of organic molecule is DNA? • NUCLEIC ACID!! • DNA stands for DEOXYRIBONUCLEIC ACID • Building Blocks of Nucleic Acids = • NUCLEOTIDES • Or subunits

  3. DNA Structure- Nucleotides • Each nucleotide is made of 3 parts: • Sugar (Deoxyribose) • Phosphate • 1 of 4 Nitrogenous Bases: • A = adenine • T = thymine • C = cytosine • G = guanine • So which part of a nucleotide changes?? • THE NITROGEN BASE!!!!! • So how many different nucleotides are there for DNA? • Four (4)

  4. Label a nucleotide!

  5. DNA Shape and Form • DNA IS DOUBLE STRANDED • STRANDS TWIST TO FORM DOUBLE- HELIX • NITROGEN BASES BIND TOGETHER TO MAKE TWO STRANDS • Aalways binds with T • Calways binds with G ****THIS IS CALLED THE BASE-PAIR RULE!**** • Now, on your notesheet, fill in the COMPLEMENTARY strand using the BASE-PAIR rule!

  6. Answer to Notesheet Practice

  7. DNA Structure • Let’s Practice Again! • One strand of DNA has the sequence you see. What is the complimentary strand’s sequence???

  8. Replication: The Video Clip http://www.youtube.com/watch?v=z685FFqmrpo

  9. DNA Replication (Copying) CLICK HERE FOR DEMO • When does DNA need to be copied???? • BEFORE any CELL DIVISION! • DNA acts as a PATTERN or TEMPLATE to make copies of itself! • Steps of DNA Replication: • First, two (2) strands are “unzipped” by enzymes • Second, other enzymes bring new subunits (nucleotides) to these separated strands • Each strand acts as a template to build a new DNA molecule • Third, you end up with 2NEW identical double helices CLICK HERE FOR DEMO #2

  10. DNA Replication Diagram Parent Strands New complimentary strands Free Floating Nucleotides

  11. Replication Practice- Step 1 “Unzip” Enzymes UNZIP

  12. Replication Practice- Step 2 Add Subunits using Base-Pair Rule

  13. THE DNA RAP!!!! • http://www.youtube.com/watch?v=d1UPf7lXeO8

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