BELL WORK: Summarize the process of DNA replication in 27 words. Make sure you include the following terms: base pair complementary unzip

BELL WORK: Answer the following questions: 1.Which enzyme brings new bases to create a new strand of DNA during replication? 2.Which biomolecule is the main component of cell membranes? 3.What monomer is made up of a sugar, phosphate, and nitrogen base?

Science Fact of the Day: An Octopus has three hearts.

CO: I will understand and explain the process and purpose of transcription. LO: I will write notes and create a mind map about transcription.

Transcription Preview

Let’s get some things straight… Replication- to make an exact copy – Replication is like making a photocopy Transcription- to transfer from one recording form to another – Transcription is like taking notes (same information, different form)

Why bother making copies? 1.Copies are good to have as a backup—it’d be bad if something happened to DNA 2.You can just put down the part of the information you need—shorter/simpler Think of it like this: DNA = master copy RNA = blueprints…you don’t need the blueprints for the whole house to build the foundation

Central Dogma We’re only talking about the first part today DNARNAProtein Ribosome Translation Transcription Nucleus

Transcription (big ideas) Is the first step in making a protein (polypeptide) Occurs in the nucleus DNA is used to make RNA – RNA is then sent out into the cell to make proteins – It’s usually just a section of the DNA strand (gene) that codes for one specific protein

There are three main differences between DNA and RNA: 1) The sugar in RNA is ribose instead of deoxyribose. 2) RNA is single- stranded. 3) RNA contains uracil instead of thymine.

Comparing base pairing rules DNA to DNA C  G G  C T  A A  T DNA to RNA C  G G  C T  A A  U

Summarize the DNA to RNA base pairing rules in exactly 8 words.

Messenger RNA (mRNA) carries copies of instructions from DNA in the nucleus to the ribosome to make proteins.

Transcription Recap

Practice Replication and Transcription We’re going to make a paper foldable to practice. You’ll have 7 minutes to replicate and transcribe DNA after we fold the paper

Mind Map Example Word bank: lipid, fatty acid, biomolecule, protein, enzyme, carbohydrate, ring, chain, Nitrogen, monosaccharide, amino acid, polypeptide Biomolecule lipid Fatty acidchain carbohydrate monosaccharide polypeptide nitrogen Amino acid enzyme protein ring =

Create your own mind map Explain connection on the arrows transcription nucleus DNA mRNA Gene helicase replication adenine guanine cytosine thymine uracil nucleotide nucleic acid