question of the day 4-19 1. dna replication and transcription occur in the _______, while...
TRANSCRIPT
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Question of the Question of the DayDay
4-191. DNA replication and
transcription occur in the _______, while translation occurs in the _______.
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REVIEWREVIEW1. The 3 parts of a nucleotide = …
2. Cytosine pairs with _____ in DNA.
3. Monomer of a protein =
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REVIEWREVIEW Peptide BondPeptide Bond – –
– Covalent bond (sharing Covalent bond (sharing electrons) formed between two electrons) formed between two amino acidsamino acids
What holds nitrogenous bases What holds nitrogenous bases together?together?
– – hydrogen bondshydrogen bonds
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DNADNA
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The process of copying DNA = …The process of copying DNA = …
– – DNA replicationDNA replication
REVIEWREVIEW
Enzyme that breaks hydrogen bonds between nitrogenous bases = …
Enzyme that adds nucleotides to form a new strand of DNA = …
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REVIEWREVIEWHelicaseHelicase – –
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Replication ForkReplication Fork – – – location where the DNA is splitting location where the DNA is splitting
apartapart
REVIEWREVIEW
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Question of the Question of the DayDay
4-201. Transcription makes ________
from DNA and then _________ makes proteins from _________.
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AnnouncementAnnouncement4-20
Unit # 8 Test will NOT be Friday 4-29 but sometime the following week!
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AssignmentsAssignments4-20
Skim (read over) section 10.3 and complete questions #s 1-8 at the bottom of page 202 – my.hrw.com. – due NOW
Webquest – DNA Transcription and Translation – due NOW
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What is a codonWhat is a codon??Codon = Codon = Three nitrogen bases that Three nitrogen bases that
code for an amino acidcode for an amino acid There are “There are “startstart” and “” and “stopstop” ”
codonscodons The code is the exact same as The code is the exact same as in in
humans as in a virus or a skunkhumans as in a virus or a skunk Scientist see this as evidence that Scientist see this as evidence that
we all share a common ancestorwe all share a common ancestor
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PracticePractice:: What is UUU?What is UUU? What is the start codon?What is the start codon?
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PracticePractice::What is UGA?What is UGA?What are the stop What are the stop codons?codons?
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Translation – Step by StepTranslation – Step by Step
A ribosome attaches to the mRNA strand and tRNA molecules bring specific amino acids to the ribosome.
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Translation – Step by StepTranslation – Step by Step
AUG (methionine) signals the start of protein synthesis.
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Translation – Step by StepTranslation – Step by Step
tRNA molecules continue along the mRNA strand bringing with them the corresponding amino acids. The amino acids are connected by peptide bonds
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After the peptide bond is formed, the ribosome slides along to the next codon. The tRNA no longer carrying an amino acid is released, and a new tRNA carrying another amino acid can attach.
TranslatioTranslation – Step n – Step by Stepby Step
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Translation – Step by StepTranslation – Step by Step
A chain of amino acids is formed until a stop codon is reached on the mRNA strand.
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Translation SummaryTranslation Summary
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http://www.youtube.com/watch?v=d1UPf7lXeO8
http://www.youtube.com/watch?v=FUA6_Ucw3i4
DNA SONGS:DNA SONGS:
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Question of the Question of the DayDay
4-261. What is a codon? Where
is it found?
2. What is an anticodon? Where is it found?
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AnnouncementAnnouncement4-26
Unit # 8 Test will be Tuesday 5-3!
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Transcription and TranslationTranscription and Translation
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AssignmentsAssignments4-26
Handout with book assignment at the end – due Thursday 4-28
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AssignmentAssignment4-18
Handout
Skim (read over) section 10.3 and complete questions #s 1-8 at the bottom of page 202 – my.hrw.com.
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A ribosome attaches to the mRNA strand and tRNA molecules bring specific amino acids to the ribosome.
A ______________ attaches to the mRNA strand and _______________________ bring specific amino acids to the ribosome.
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AUG (methionine) signals the start of protein synthesis.
_________ (_______________) signals the start of protein synthesis.
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tRNA molecules continue along the mRNA strand bringing with them the corresponding amino acids. The amino acids are connected by peptide bonds
____________________________________________________________ bringing with them the corresponding amino acids. The amino acids are connected by ___________________
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After the peptide bond is formed, the ribosome slides along to the next codon. The tRNA no longer carrying an amino acid is released, and a new tRNA carrying another amino acid can attach.
After the peptide bond is formed, ________ ____________________________________. The tRNA no longer carrying an amino acid is released, and ______________________ ____________________________________.
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A chain of amino acids is formed until a stop codon is reached on the mRNA strand.
A chain of amino acids is formed until a ______________________ is reached on the mRNA strand.