Enzymes involved in DNA Replication & Transcription

Slides:

Advertisements

Similar presentations

DNA Review What does DNA store that is important? If a DNA strand read AGT-CCG-GTA what would the complimentary strand read? What holds the nitrogen bases.

Advertisements

DNA Replication DNA is replicated before cell division, when a cell divided into two cells.

PROTEIN SYNTHESIS. DNA RNA Protein Scientists call this the: Central Dogma of Biology!

AP Biology DNA Replication Ch.12.2 AP Biology DNA Replication  Purpose: cells need to make a copy of DNA before dividing so each daughter.

DNA, AND IN SOME CASES RNA, IS THE PRIMARY SOURCE OF HERITABLE INFORMATION Genetic information is transmitted from one generation to the next through DNA.

DNA Replication. What is DNA replication? When does it happen? DNA replication is the process by which the DNA molecule duplicates itself to create identical.

Replication of DNA Objectives: 1. Summarize the roles of the different enzymes involved in replication of DNA. 2. Explain how the leading and lagging strands.

DNA Replication!.

PROMOTER REGION REGION TRANSCRIPTION REVIEW RNA POLYMERASE.

 Helicase enzyme binds to the replication initiation site and begins to unwind and separate the DNA helix into single strands.

III. DNA Replication A. Each chain of nucleotides of the DNA double helix has all the information needed to reconstruct the complementary chain of nucleotides.

DNA Replication. When and why must the DNA molecule be copied? Before cell division the DNA must be copied so that any new cells will have an identical.

Temporary break to allow uncoiling

Figure 8.2 Objectives: Identify the key molecular players involved in DNA replication Construct a sequence of events that summarizes the process of DNA.

DNA REPLICATION. WHAT IS DNA? The hereditary material responsible for passing genetic information from cell to cell and generation to generation. It’s.

DNA Replication. Genes as Information Transfer A gene is the sequence of nucleotides within a portion of DNA that codes for a peptide or a functional.

Fig Cytosine (C) Adenine (A)Thymine (T) Guanine (G)

{ DNA Replication.  When DNA makes an exact copy of itself.  Required step before cell division (making new cells).  DNA is the template / Enzymes.

Do Now  What is replication?  Where does this take place?

DNA REPLICATION. Replication Facts DNA has to be copied before a cell divides DNA has to be copied before a cell divides DNA is copied during the S or.

DNA Replication. Beginning of DNA Replication Begins at Origins of Replication Two strands open forming Replication Forks (Y-shaped region) New strands.

Answers to Homework Tasks

BIOLOGY 12 DNA Replication.

21.4 DNA Replication The function of DNA in the cells is to

DNA Replication.

2A. Distinguish between DNA and RNA.

DNA Replication Making New DNA Molecules

2A. Distinguish between DNA and RNA.

KEY CONCEPT DNA replication copies the genetic information of a cell.

DNA Replication.

Bell Work What are the base pairs?

KEY CONCEPT DNA replication copies the genetic information of a cell.

2A. Distinguish between DNA and RNA.

DNA Replication.

DNA REPLICATION Overview Information Chromosome Structure.

IB Topics3.4 & 7.2- DNA Replication

DNA Replication.

5.3 DNA Replication.

DNA Replication Essential Question: How do enzymes help ensure DNA is copied correctly?

Section 8-3 “DNA Replication”

DNA Replication pp

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

BIOLOGY 12 DNA Replication.

KEY CONCEPT DNA replication copies the genetic information of a cell.

4.1: DNA, and in some cases RNA, is the primary source of heritable information. N4.02 DNA Replication Unit 4: Pod 1 DNA.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

DNA Replication Essential Question: How do enzymes help ensure DNA is copied correctly?

KEY CONCEPT DNA replication copies the genetic information of a cell.

DNA Replication Chapter 12 Section 2.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

Steps of DNA Replication

DNA Replication Notes.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

DNA Replication.

DNA REPLICATION NOTES.

DNA Replication.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

KEY CONCEPT DNA replication copies the genetic information of a cell.

Dna replication SBI4U.

Presentation transcript:

Enzymes involved in DNA Replication & Transcription Function Helicase (DNA replication) “molecular zipper” – unwinds double helix; breaks hydrogen bonds that holds base pairs together Topoisomerase (gyrase) (DNA replication) “molecular swivel”- relieves overwinding stress on DNA strands by working ahead of helicase and breaking, swiveling and rejoining small sections of the DNA molecule DNA polymerase (DNA replication) Using a parent DNA strand, adds free-floating nucleotides (A, T, G, & C’s) covalently to the new strand being constructed. Ligase (DNA replication) “molecular glue” – joins fragments of the New DNA strand together RNA polymerase (used in transcription) Uses one strand of DNA as a template to construct mRNA – adds free-floating nucleotide Editase (DNA replication) Fixes mistakes on DNA molecule