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DNA and Protein Synthesis
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Transformation
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What does it mean to be transformed? How did Griffith’s experiment give clues about the role of genes?
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Avery’s Experiment
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What is the significance of DNase?
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Hershey - Chase
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What would have it meant if they found Sulfur inside the cells and not phosphorus?
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What are the three roles of DNA?
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The Role Of DNA Store information in the form of genes Copy information during mitosis Transmit information from one generation to the next
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What are the 3 parts of a nucleotide? Can you draw a nucleotide?
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What type of bonds are between the sugar and the phosphate group? What type of bond hold the nitrogen bases together?
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Nucleotides
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Can you show me that you understand Chargaff’s rule?
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Chargaff’s Rule Go to page 345 “Analyzing Data”to review Chargaff’s rule.
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Using 4 nucleotides, can you draw DNA being double sided and anti- parallel?
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DNA Structure Go to page 348 to review your understanding of the key concepts.
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What is the role of the following enzymes involved in DNA replication? Helicase Polymerase Ligase
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DNA Replication
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Leading End- DNA is added continuously towards the replication fork Lagging End – DNA is added discontinuously away from the replication fork using primers and Okazaki fragments
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Chapter 12 Assessment Review the question from pages 356 – 357 (# 1-6 & 9-11) Review question 1-5 and question 10 on page 359
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Chapter 17 Protein Synthesis
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Types of RNA
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DNA & RNA Master Plan vs Blue Print How is RNA different from DNA?
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Protein Synthesis Transcription o Takes place in the nucleus o Makes a strand of mRNA from _____ o Promoters tell the enzyme RNA ____________ where to transcribe the DNA template strand. o The mRNA is spliced keeping the _________ and removing the ____________. RNA splicing allow on gene to code for more than one _____________
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Translation o Takes place in the ___________ o Starts with a start _________ o Termination occurs at the stop ________ o Molecules involved; mRNA, tRNA, ribosomes, amino acids o The end product of translation is a _____________ o The central dogma states that ________ makes _________ which codes for a _________.
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Translation mRNA has a series of codons that specify the certain amino-acid sequence A codon codes for a specific _________ which is a subunit of a ____________ Codon ACC codes for __________ (use your codon table on page 367)
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Translation tRNA has __________ that are complementary to codons on mRNA tRNA – CCU is complementary to ____ - mRNA tRNA has an attachment site so it can transport amino acids to the __________
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Translation Ribosomes are made of the large and small sub units The sub units are composed of ______ and proteins Ribosomes read the ______ strand and allow the _____ to bring in the proper amino acid to the growing polypeptide chain
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Translation 3 steps of translation include: Initiation – the ______ attaches to the mRNA strand Elongation – the ribosome allows the polypeptide chain to grow one _______ at a time. Termination – when a _______ codon is reached the polypeptide chain is complete
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13.2 Assessment Go to page 371 and answer questions 1-3
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Table of Codons
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Quick Lab Go to page 367 and lets review “How Does a Cell Interpret Codon”
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Gene Mutations
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Mutations Chromosomal
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13.3 Assessment Go to page 376 to review key concepts question #1
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Mutations and Evolution Slight variations in populations are due to changes in the DNA (genes) Leads to some individuals having more favorable traits than others and gives them a better chance at survivalindividuals
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Chapter 13 Review Review questions on pages 386 – 387 o 13.1 questions 1-5 o 13.2 questions 8-14 o 13.3 questions 18-23 Standardized Test Prep on page 389 o Questions 1-8
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