RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ Transcription in Procaryotes.

Slides:

Advertisements

Similar presentations

20,000 GENES IN HUMAN GENOME; WHAT WOULD HAPPEN IF ALL THESE GENES WERE EXPRESSED IN EVERY CELL IN YOUR BODY? WHAT WOULD HAPPEN IF THEY WERE EXPRESSED.

Advertisements

Gene Regulation Prokaryotes (no nucleus). Lac operon System of genes that can turn on and off in E. coli (bacteria). These genes make enzymes that break.

THE LAC OPERON TANVI BAGTHARIA I P O Z Y.

Gene Regulation. Levels of Regulation DNA rearrangement –Immune System rearranges DNA Bacteria can change DNA in chromosomes Not as common as other methods.

Biotechnology 01 central dogma. RNA polymerase σ σ 2 ββ’ Core enzyme σ σ 2 ββ’ promoter DNA σ 2 ββ’

TRANSCRIPTION AND TRANSLATION: THE ROAD TO MAKING PROTEINS Part 1: Transcription (p 424) Investigative Question: What is RNA? What is Transcription?

2.7 DNA Replication, transcription and translation

Transcription and Translation

Gene Expression and Regulation

RNA. ________ are coded DNA instructions that control the ___________ of proteins. Genetic ______________ can be decoded by copying part of the ___________.

Transcription & Translation Do Now: 1.Get out yesterday’s homework (10-1 review) 2.If a DNA strand has the nucleotide sequence TCC-GAT-AAT, what will the.

For the following replication fork, which strand would be leading? 5’ Top Strand Bottom Strand.

RNA Chapter Structure of RNA Ribose- the sugar molecule of every RNA nucleotide Uracil- nitrogen-containing pyrimidine base (replaces thymine) Uracil.

RNA and Protein Synthesis

Trp Operon A brief description. Introduction a repressible system In this system, though, unlike the lac operon, the gene for the repressor is not adjacent.

The Lac Operon An operon is a length of DNA, made up of structural genes and control sites. The structural genes code for proteins, such as enzymes.

Prokaryotic Transcription Eukaryotic Transcription Both.

Gene Expression. Remember, every cell in your body contains the exact same DNA… …so why does a muscle cell have different structure and function than.

Prokaryotic cells turn genes on and off by controlling transcription.

Complexities of Gene Expression Cells have regulated, complex systems –Not all genes are expressed in every cell –Many genes are not expressed all of.

5-4 Notes: TRANSCRIPTION (DNA  RNA)

TRANSCRIPTION AND TRANSLATION: THE ROAD TO MAKING PROTEINS Part 1: Transcription (p 424) Investigative Question: What is RNA? What is Transcription?

What is RNA, anyways? How is it different than DNA?

Gene Expression & Regulation Chapter 8.6. KEY CONCEPT Gene expression is carefully regulated in both prokaryotic and eukaryotic cells.

DNA, RNA, and Gene Expression Chapter 14. Remember DNA’s structure allows it to do 3 things… DNA’s structure allows it to do 3 things… - But….the structure.

DNA -> RNA -> Proteins The basic language of all living things.

Answers to Homework Tasks

Chapter 21 Nucleic Acids and Protein Synthesis

How does your body know when to make proteins?

DNA Transcription.

Protein Synthesis.

Genetic Engineering and Gene Expression

RNA carries DNA’s instructions.

RNA carries DNA’s instructions.

Notes – Protein Synthesis: Transcription

Gene Regulation.

Prokaryotic cells turn genes on and off by controlling transcription.

Prokaryotic cells turn genes on and off by controlling transcription.

Regulation of Gene Expression

RNA carries DNA’s instructions.

Concept: Explain Transcription Using Models of DNA and RNA

Gene regulation Section Pages

RNA carries DNA’s instructions.

RNA carries DNA’s instructions.

HOW PROTEINS ARE MADE BY THE CELL

DNA Transcription.

Protein Synthesis Lecture 5

Daily Warm-Up Dec. 11th -What are the three enzymes involved with replication? What is the function of each? Homework: -Read 13.1 Turn in: -Nothing.

Prokaryotic cells turn genes on and off by controlling transcription.

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

The transcription process is similar to replication.

Gene Expression Activation of a gene to transcribe DNA into RNA.

Friday NOTES: Transcription.

GENE REGULATION = REGULATION OF TRANSCRIPTION

RNA carries DNA’s instructions.

= DNA Nucleotide Phosphate Nitrogen Base Pairs:

Have your clickers ready!

DNA -> RNA -> Proteins

Prokaryotic cells turn genes on and off by controlling transcription.

RNA carries DNA’s instructions.

Prokaryotic (Bacterial) Gene Regulation

Transcription Using DNA to make RNA.

Transcription Protein Synthesis.

Biology II Study Guide for Unit Test on Operons and Transformation Lab 2013 You should be able to … 1. describe gene expression by explaining the following:

Prokaryotic cells turn genes on and off by controlling transcription.

Transcription and the RNA code

TRANSCRIPTION DNA mRNA.

Prokaryotic cells turn genes on and off by controlling transcription.

Prokaryotic cells turn genes on and off by controlling transcription.

Presentation transcript:

RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ Transcription in Procaryotes

RNA polymerase σ α 2 ββ’ Core enzyme σ promoter DNA α 2 ββ’ σ factor ： rpoD rpoH rpoN… 等 Regulation

Figure 9.03

Heat shock proteins

lac operon

araBAD operon

What do we mean by the 5´ end of a gene? Since DNA has two antiparallel strands it has no actual polarity. mRNA does have polarity since it is single stranded. The 5´ end refers to the mRNA molecule and since it is copied from the DNA by standard base pairing the 5´ end of a gene is the 3´ end of the template strand.