Introducing 

Prezi AI.

Your new presentation assistant.

Refine, enhance, and tailor your content, source relevant images, and edit visuals quicker than ever before.

Loading…
Transcript

What is DNA?

Double Helix

  • AKA Deoxyribonucleic acid is a molecule that stores our genetic instructions, and programs all of our cell’s activity.
  • Each strand is connected to a complimentary strand through hydrogen bonding, and is made up of 4 possible bases:
  • DNA is a linear chain that has 3 Nucleotides that form its strand shape. Many atoms combined together form the shape of the spiraling ladder.

What are the Three Steps in DNA Replication?

1. ADENINE

2. GUANINE

3. CYTOSINE

4. THYMINE

1. PHOSPHORIC ACID

2. A PENTOSE SUGAR

3. A NITROGEN BASE

Step 3: Termination

  • Last step of DNA replication

Step 1: Initiation

  • Termination of the RNA primer in the leading strand occurs in the tolomere section

  • Starts in certain locations called "origins"
  • Enzymes called nucleases travel the new strands removing any misbased pairs and filling any gaps with DNA polymerase
  • Two strands of DNA are separated
  • The enzyme Helicase helps separate(unwind) the DNA strands
  • This is done by Helicase breaking down hydrogen bonds. During this time an RNA primer prevents these 2 strands from rejoining

Step 2: Elongation

  • At the replication fork, the leading and lagging strands separate into different directions
  • The enzyme polymerase controls replication in the leading strand, while okazaki fragments are created in small sections and paired to the lagging strand

How does DNA Work? and Where is it Located?

  • DNA acts as a blueprint for all living things.
  • Instructs amino acids how to line up and form themselves into the perfect protein shapes
  • DNA spends most of its life coiled up like a noodle living inside the nucleus; amino acids however live outside the nucleus in what’s called the cytoplasm
  • To help DNA interact with the cytoplasm and convert those amino acids into proteins special chemicals inside the nucleus make partial copies of the DNA code. These partial copies are called RNA. They look a lot like DNA but they’re shorter and missing one of their sides.

DNA Replication

What is DNA Replication?

  • Is a semi-conservative replication that occurs in the nucleus of a cell.
  • Is the process of copying one DNA helix into two identical double helics

Why is DNA Replication considered a semi-conservative process?

  • New double helix has one conserved old strand and one new strand
  • Each helix that is made contains one strand from the helix in which it was copied from
  • Replication of one helix results in two daughter helics each in which contains one of the original parental helical strands

References

Banks, E. (2017). Three Main Steps in the Process of DNA Replication. Retrieved May 28,

2017, from http://education.seattlepi.com/three-main-steps-process-dna-replication- 4361.html

DNA Structure/ (n.d.). Retrieved May 28, 2017, from http://theinvestigation.yolasite.com/dna- structure.php

DNA Replication Info. (2006-2012). Retrieved May 28, 2017, from http://www.dnareplication.info/stepofdnareplication.php

Kumar, P. (2015, October 16). 3 Phases of DNA Replication Process (With Diagram). Retrieved

May 28, 2017, from http://biologydiscussion.com/dna/dna-replication-process/3-phases-of-dna-replication-process-with-diagram/11686

Mader, S. S. (2014). Inquiry into life (4th ed.). New York, NY: McGraw-Hill.

What is DNA replication? (2016, January 25). Retrieved May 28, 2017, from http://www.yourgenome.org/facts/what-is-dna-replication

Where does DNA replication occur? (n.d.). Retrieved May 28, 2017, from http://www.reference.com/science/dna-replication-occur-3e9f904499184c4f

Presentation by: Mack's Angels

Taylor, Laura, Cheyanne,

Ariel, Megan and Mack.

Where does DNA Replication Occur?

  • Occurs in the Nucleus
  • Is the process in which one DNA double helix is copied into two identical double helices
  • This occurs when the body is growing or healing itself
  • Cells divide
  • New cell requires an exact copy of DNA contained in the chromosomes
Learn more about creating dynamic, engaging presentations with Prezi