Catalyst 1.In what form is DNA during interphase? 2.In what form is DNA during mitosis? 3.How many cells are produced in mitosis? How many are produced.

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Presentation transcript:

Catalyst 1.In what form is DNA during interphase? 2.In what form is DNA during mitosis? 3.How many cells are produced in mitosis? How many are produced in meiosis? 1.How do the daughter cells in mitosis compare to the parent? What about in meiosis?

Agenda Cell Cycle Review Hand back tests (comparison chart) Notes – Protein Synthesis (Transcription) DNA and RNA baggies Independent Practice Exit Ticket

Cell Cycle Review

REVIEW

Agenda Cell Cycle Review Hand back tests (comparison chart) Notes – Protein Synthesis (Transcription) DNA and RNA baggies Independent Practice Exit Ticket

Protein Synthesis h5mJbP23Buo

Transcription I can explain transcription.

DNA provides the instructions for making proteins. The Central Dogma of Biology tells us how proteins are made from DNA instructions. The process of copying DNA’s instructions into RNA is called transcription.

RNA Ribonucleic acid (RNA) is a long chain of nucleotides. ribose sugar nucleotides contain ribose sugar (instead of deoxyribose) nitrogen bases: AUCG single-stranded molecule

Always remember… RNA loves U

Types of RNA Messenger RNA (mRNA) carries the message of DNA from the nucleus to the ribosome Ribosomal RNA (rRNA) makes up the ribosome Transfer RNA (tRNA) carries an amino acid to the ribosome and binds to mRNA

DNA and the instructions it contains is trapped in the nucleus because it is too large to get out. DNA is too big…but mRNA is small enough to leave the nucleus!

DNA’s instructions must be copied into a smaller form: messenger RNA (mRNA). This process is called transcription. RNA polymerase breaks the hydrogen bonds in DNA and uses it as a template to create a single strand of mRNA.

mRNA leaves the nucleus with its message and heads for a ribosome.

Base-pairing During Transcription Because RNA has the base uracil (U) instead of the thymine (T) in DNA, it has slightly different base-pairing rules.

Guided Practice What is the RNA message created from the following sequence of DNA? T A C G A T T G A A U G C U A A C U DNA RNA

Guided Practice What is the sequence of mRNA that is made from the following strand of DNA? A A C T G C C T A U U G A C G G A U DNA RNA

Agenda Cell Cycle Review Hand back tests (comparison chart) Notes – Protein Synthesis (Transcription) DNA and RNA baggies Independent Practice Exit Ticket

DNA and RNA baggies 4 minutes with a partner

Independent Practice 15 minutes

Exit Ticket