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Category: A1 Water and Nucleic Acids

  • Biology A1.2.4 [AHL] Further About DNA

    Biology A1.2.4 [AHL] Further About DNA

    Learning Objectives Part 1: Directionality of RNA and DNA Directionality of RNA and DNA in Enzymatic Processes Replication Transcription Translation Part 2: Maintaining DNA Helical Structure Purine-pyrimidine Chargaff’s rules Part 3: What are Nucleosomes? DNA is packed (condensed) in the nucleus in a form of chromosomes. To do this, the DNA must wrap around many…

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  • Biology A1.2.3 DNA as Universal Genetic Materials

    Biology A1.2.3 DNA as Universal Genetic Materials

    Learning Objectives Part 1: Importance of Base Complimentary Role of Complementary Base Pairing in DNA Replication and Gene Expression DNA Replication Gene Expression Part 2: DNA as Universal Genetic Materials Diversity of DNA Base Sequences and Limitless Information Storage Conservation of the Genetic Code and Universal Common Ancestry

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  • Biology A1.2.2 Structures of RNA and DNA

    Biology A1.2.2 Structures of RNA and DNA

    Learning Objectives Part 1: Condensation of Nucleotides Part 2: Structure and Roles of RNA Roles of RNA Part 3: Structure of DNA Structure of DNA as a Double Helix Part 4: Differences of DNA and RNA Ribose sugar is the sugar of RNA Deoxyribose sugar is the sugar of DNA

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  • Biology A1.2.1 Nucleotides Make Nucleic Acid

    Biology A1.2.1 Nucleotides Make Nucleic Acid

    Learning Objectives Part 1: Roles and Features of Nucleic Acids DNA as genetic materials for all living organisms Types of nucleic acids What are nucleotides? Part 2: DNA Backbone and Genetic Bases When there are many nucleotides linked together, they will look like a long strand of thread with the nitrogenous bases sticking out. This…

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  • Biology A1.1.2 Water on Earth and Beyond

    Biology A1.1.2 Water on Earth and Beyond

    Learning Objectives Part 1: Origin of Earth’s Water Earth’s Water Hypothesis of Earth’s Water Origin Part 2: Factors of Earth’s Water Retention Two key factors contributed to Earth’s ability to retain water after its delivery by asteroids: Part 3: Goldilocks Zone In the fairy tale Goldilocks and the Three Bears, a young girl tries three…

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  • Biology A1.1.1 Water

    Biology A1.1.1 Water

    Learning Objectives Part 1 Theory of Water Hydrogen Bonding in Water Due to the high electronegativity of O, it pulls the shared electrons towards it making H atoms to be an area of electron deficit (δ+). The O side as the result is now δ– as it is an electron rich region When two water…

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