1 DNA Replication copyright cmassengale Vyi4.

Slides:



Advertisements
Similar presentations
DNA and Replication.
Advertisements

1 DNA and Replication. 2 History of DNA Early scientists thought protein was the hereditary material –Protein is more complex than DNA –Proteins are composed.
DNA Replication DNA is replicated before cell division, when a cell divided into two cells.
1 DNA Replication copyright cmassengale. 2 Replication Facts DNA has to be copied before a cell dividesDNA has to be copied before a cell divides DNA.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
1 DNA and Replication copyright cmassengale. 2 Antiparallel Strands One strand of DNA goes from 5’ to 3’ (sugars) The other strand is opposite in direction.
copyright cmassengale
1 Aim #16: How does a DNA molecule replicate itself?
1 History of DNA. 2 DNA Structure Rosalind Franklin took diffraction x-ray photographs of DNA crystals In the 1950’s, Watson & Crick built the first model.
History Of DNA and Replication
1 2 DNA DNA.DNA is often called the blueprint of life. In simple terms, DNA contains the instructions for making proteins within the cell.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
1 DNA and Replication ubyIRiN84 DNA replication…3 min. WATCH, LISTEN AND COMPREHEND!!!!!!!
1 DNA Replication copyright cmassengale. 2 Replication Facts DNA has to be copied before a cell dividesDNA has to be copied before a cell divides DNA.
copyright cmassengale
1 DNA and Replication 2 History of DNA 3 Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins.
1 DNA Replication. 2 Video 3 Replication Facts DNA has to be copied before a cell dividesDNA has to be copied before a cell divides DNA is copied during.
1 DNA and Replication. 2 DNA Structure 3 DNA Stands for Deoxyribonucleic acid nucleotidesMade up of subunits called nucleotides Nucleotide made of:Nucleotide.
1 DNA and Replication. SCI.9-12.B [Indicator] - Compare DNA and RNA in terms of structure, nucleotides, and base pairs. 2.
DNA and Replication 1. History of DNA 2  Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA 
1 DNA Structure and Replication. 2 DNA Two strands coiled called a double helix Sides made of a pentose sugar Deoxyribose bonded to phosphate (PO 4 )
1 DNA Replication Preparing for mitosis or meiosis copyright cmassengale.
copyright cmassengale
1 DNA and Replication. 2 Chargaff’s Rule Adenine ThymineAdenine must pair with Thymine Guanine CytosineGuanine must pair with Cytosine The bases form.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
DNA. History of DNA Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins were composed of.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
1 History of DNA copyright cmassengale. 2 History of DNA Early scientists thought protein was the cell’s hereditary material because it was more complex.
DNA Replication - copying DNA molecule. Why does DNA need to copy? Every time a cell divides (mitosis), an EXACT copy of DNA must go into new cells! Growth.
1 DNA Structure copyright cmassengale. 2 DNA Nucleotide O=P-O OPhosphate Group Group N Nitrogenous base (A, G, C, or T) (A, G, C, or T) CH2 O C1C1 C4C4.
DNA Replication. Definition: The DNA within the nucleus is Replicated Before a cell can go through mitosis or meiosis the DNA MUST be replicated, or the.
DNA Replication and Repair Chapter 13.3 AP Biology Fall 2010.
History of DNA. Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins were composed of 20.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
1 DNA and Replication copyright cmassengale. 2 History of DNA Early scientists thought protein was the cell’s hereditary material because it was more.
{ DNA Replication.  When DNA makes an exact copy of itself.  Required step before cell division (making new cells).  DNA is the template / Enzymes.
1 DNA and Replication. 2 History of DNA 3 Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins.
DNA: Structure and Replication DNA DNA. DNA is often called the blueprint of life. DNA contains the instructions for making proteins within the cell.
Bell Work DNA replication is the process of making a copy of DNA. DNA replication occurs before a cell divides so each cell has a copy of DNA. Grab science.
1 DNA and Replication. 2 History of DNA 3 Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins.
1 DNA Structure copyright cmassengale. 2 DNA Two strands coiled called a double helix Sides made of a pentose sugar Deoxyribose bonded to phosphate (PO.
1 DNA and Replication. 2 Discovery of DNA Structure Erwin Chargaff showed the amounts of the four bases on DNA ( A,T,C,G) In a body or somatic cell: A.
1 DNA and Replication. 2 History of DNA 3 Transformation Fred Griffith worked with virulent S and nonvirulent R strain Pneumoccocus bacteria He found.
1 DNA and Replication. 2 History of DNA 3 Early scientists thought protein was the cell’s hereditary material because it was more complex than DNA Proteins.
1 DNA and Replication copyright cmassengale. 2 History of DNA copyright cmassengale.
DNA and Replication.
copyright cmassengale
DNA and Replication.
DNA and Replication.
copyright cmassengale
DNA All life on earth uses a chemical called DNA to carry its genetic code or blueprint. In this lesson we be examining the structure of this unique molecule.
DNA Replication Making New DNA Molecules
DNA Replication.
copyright cmassengale
copyright cmassengale
copyright cmassengale
copyright cmassengale
copyright cmassengale
copyright cmassengale
DNA vs RNA DNA 1- Deoxyribose sugar
DNA Replication Essential Question: How do enzymes help ensure DNA is copied correctly?
DNA and Replication.
DNA = Deoxyribonucleic Acid
DNA Replication.
DNA and Replication.
copyright cmassengale
Presentation transcript:

1 DNA Replication copyright cmassengale Vyi4

What is replication? The process of making an EXACT copy of DNA. Why does the copy need to be EXACT? copyright cmassengale2

3 When does replication occur? DNA has to be copied before a cell dividesDNA has to be copied before a cell divides New cells will need identical DNA strandsNew cells will need identical DNA strands When do you need new cells? Growth, healing, making sex cells…When do you need new cells? Growth, healing, making sex cells… copyright cmassengale

Replication video v=4jtmOZaIvS0&feature=relatedhttp:// v=4jtmOZaIvS0&feature=related copyright cmassengale4

5 DNA Replication Helicase (a protein called an ENZYME) unwinds and separates the 2 DNA strands by breaking the weak hydrogen bondsHelicase (a protein called an ENZYME) unwinds and separates the 2 DNA strands by breaking the weak hydrogen bonds Single-Strand Binding ProteinsSingle-Strand Binding Proteins attach and keep the 2 DNA strands separated and untwisted copyright cmassengale

6 DNA Replication DNA polymerase can then add the new nucleotides What chemical reaction is this? copyright cmassengale

7

8 Proofreading New DNA DNA polymerase initially makes about 1 in 10,000 base pairing errors (MUTATIONS)DNA polymerase initially makes about 1 in 10,000 base pairing errors (MUTATIONS) If you have about 3 billion base pairs, how many errors is this?If you have about 3 billion base pairs, how many errors is this? copyright cmassengale

Telephone – the written version One side of the room versus the other. You need a scrap piece of paper and something to write with. copyright cmassengale9

DNA polymerase proofreads and correct these mistakesproofreads and correct these mistakes The new error rate for DNA that has been proofread is 1 in 1 billion base pairing errorsThe new error rate for DNA that has been proofread is 1 in 1 billion base pairing errors Much better!!!Much better!!! copyright cmassengale10

11 Semiconservative Model of Replication Idea presented by Watson & CrickIdea presented by Watson & Crick TheThe two strands of the parental molecule separate, and each acts as a template for a new complementary strand New DNA consists of 1 PARENTAL (original) and 1 NEW strand of DNA Parental DNA DNA Template New DNA copyright cmassengale

12 DNA Damage & Repair Chemicals & ultraviolet radiation damage the DNA in our body cells Cells must continuously repair DAMAGED DNA Excision repair occurs when any of over 50 repair enzymes remove damaged parts of DNA DNA polymerase and DNA ligase replace and bond the new nucleotides together copyright cmassengale

<3 copyright cmassengale13

14 Question: What would be the complementary DNA strand for the following DNA sequence? DNA 5’-CGTATG-3’ copyright cmassengale

15 Answer: DNA 5’-CGTATG-3’ DNA 3’-GCATAC-5’ copyright cmassengale

16copyright cmassengale

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.