LEARNING OBJECTIVES
• Differentiate between classic and sophisticated scientific methods.
• Explain how methods extend human cognition.
• Discuss observation, experimentation, and exploration in inquiry.
• Analyze how tools influence discovery.
• Define living systems' characteristics.
• Explain system organization and regulation.
• Describe energy conversion and metabolism.
• Relate life properties to macromolecules.

KEY CONCEPTS

I. Introduction to the Scientific Method
• Science is a systematic approach.
• Traditional view includes:
• Observation
• Question formation
• Hypothesis development
• Experimentation
• Data analysis
• Conclusion

II. Krauss’ Redefinition of the Scientific Method
Reference: Krauss A. Redefining the Scientific Method: As the Use of Sophisticated Scientific Methods That Extend Our Mind. PNAS Nexus, 2024.
• Traditional method: structured steps.
• Sophisticated method: integrates complex tools.
• Example: Statistical analysis, advanced instruments, exploratory research.

III. The Role of Scientific Tools in Modern Research
• Technology extends observation, measurement, analysis.
• Discoveries don't always follow rigid steps.
• Key takeaway: Science is defined by logic and evidence.

IV. Implications for Science Education and Practice
• Students may focus too much on rigid steps.
• Science is about asking questions and applying logic.
• Recognizing diverse approaches broadens understanding.

DEFINING LIFE: THE PROPERTIES OF LIVING SYSTEMS

2. Organization
   • Life is structured from molecules to ecosystems.
   • Cellular level: atoms → molecules → organelles → cells.
   • Multicellular organisms: tissues → organs → organ systems → organisms.

3. Membrane Containment
   • Cells are enclosed by a membrane that regulates conditions.
   • The membrane separates the cell.
   • Related macromolecule: Lipids.

4. Replication and Genetic Information
   • All life must reproduce.
   • Genetic material (DNA/RNA) contains instructions.
   • Related macromolecule: Nucleic acids.

5. Energy Conversion and Metabolism
   • Living systems require energy.
   • Organisms convert energy.
   • Metabolism includes catabolism and anabolism.
   • Related macromolecule: Carbohydrates.

6. Regulation and Response to Environment
   • Life responds to stimuli (homeostasis).
   • Proteins play a crucial role in cellular function.
   • Related macromolecule: Proteins.

II. THE FOUR MACROMOLECULES AND THEIR ROLE IN LIFE
• Carbohydrates – Provide energy and support.
• Nucleic Acids – Store genetic information.
• Proteins – Serve as enzymes and regulators.
• Lipids – Form membranes and store energy.

Unit 2- Basic chemistry of life

LEARNING OBJECTIVES
By the end of this lecture, you should be able to:
• Describe atom structure.
• Explain valence electrons.
• Interpret the periodic table.
• Identify atomic interactions.
• Differentiate bond types.
• Explain water properties.
• Describe how water supports life.
• Define pH, acids, and bases.

Key Concepts
• Structure of an Atom
• Protons, Neutrons, and Electrons
• Atomic Number and Mass Number
• Electron Shells and Valence Electrons
• Valence Electrons and Reactivity
• Understanding the Periodic Table
• Trends in Electronegativity and Reactivity
• Biochemical Relevance of Atoms
• Ions and Their Biological Importance
• Review of Different Bond Types
• Covalent Bonds
• Ionic Bonds
• Hydrogen Bonds
• Properties of Water
• Introduction to pH, Acids, and Bases

Unit 3- macromolecules

LEARNING OBJECTIVES
By the end of this unit, students should be able to:
• Review macromolecules and monomers.
• Define carbohydrates.
• Explain types of saccharides.
• Discuss carbohydrate roles.
• Identify carbohydrate examples.
• Explain isomers.
• Describe protein structure.
• Explain protein structure levels.
• Identify protein functions.
• Understand enzymes.
• Discuss protein misfolding.
• Define lipids.
• Differentiate lipid types.
• Explain lipid roles.
• Discuss lipid impact on health.
• Describe phospholipid structure.
• Explain phospholipid role in membranes.
• Identify steroid structure.
• Discuss wax properties.

KEY CONCEPTS

Review of Biological Macromolecules
• Carbohydrates: Structure, function
• Lipids: Hydrophobic, energy storage
• Proteins: Amino acids, diverse functions
• Nucleic Acids: DNA & RNA
• Biochemical Tests for Macromolecules
• Benedict’s Test for sugars
• Iodine Test for starch
• Biuret Test for proteins
• Grease Spot Test for lipids
• Macromolecules Lab Pre-Lab Activity
• IMRaD Scientific Report Format

Carbohydrates
• Define carbohydrates.
• Explain saccharides.
• Discuss roles.
• Identify examples.
• Explain isomers.
• Carbohydrates are C, H, and O molecules.
• Types of Carbohydrates
• Monosaccharides (Simple Sugars)
• Disaccharides (Two Monosaccharides Linked by Glycosidic Bonds)
• Polysaccharides (Complex Carbohydrates)
• Functions:
• Energy Storage:
• Structural Support:
• Carbohydrates and Metabolism
• Hydrolysis vs. Dehydration Synthesis:
• Energy Release:
• The Importance of Carbohydrates in Biology
• Dietary Significance:
• Role in Cell Communication:

Proteins
• Introduction to Proteins
• Proteins are polymers of amino acids.
• Levels of Protein Structure
• Primary Structure
• Secondary Structure
• Tertiary Structure
• Quaternary Structure
• Functions of Proteins
• Structural Support:
• Transport:
• Enzymes: Biological catalysts
• Defense:
• Cell Signaling:
• Movement:
• Enzymes: Biological Catalysts
• Factors affecting enzyme activity:
• Temperature:
• pH:
• Substrate Concentration:
• Inhibitors:
• Protein Misfolding and Disease
• Denaturation:
• Misfolded proteins can lead to diseases:
• Alzheimer’s Disease:
• Parkinson’s Disease:
• Prion Diseases:

Lipids
• Structure and Function of Triglycerides
• Saturated vs. Unsaturated Fats
• Saturated Fats:
• Unsaturated Fats:
• Cis vs. Trans Fats
• Cis Fats:
• Trans Fats:
• Polyunsaturated vs. Monounsaturated Fats
• Monounsaturated Fats:
• Polyunsaturated Fats:
• Omega-3 and Omega-6 Fatty Acids
• Omega-3 Fatty Acids:
• Omega-6 Fatty Acids:
• Phospholipids: Structure and Function
• Steroids: Structure and Biological Importance
• Examples:
• Steroid Hormones:
• Vitamin D:
• Waxes: Structure and Functions

Unit 4- photosynthesis

LEARNING OBJECTIVES
By the end of this unit, you should be able to:
• Describe photosynthesis and respiration.
• Identify stages within the cell.
• Summarize the steps.
• Explain energy capture.
• Compare photosynthesis and respiration.

🧩 KEY CONCEPTS

I. Overview of Energy in Living Systems
• Importance of ATP.
• Autotrophs vs. Heterotrophs.
• Photosynthesis and respiration relationship.

II. Photosynthesis
• Overall Equation:
$6CO2+6H2O+light energy→C6H12O6+6O2$
• Where: In chloroplasts.
• Stages of Photosynthesis:
• Light Reactions:
• Capture light energy.
• Produce ATP and NADPH.
• Release oxygen.
• Calvin Cycle:
• Use ATP and NADPH to fix carbon dioxide into glucose.
• Key Terms: Chlorophyll, Photosystems I and II

III. Cellular Respiration
• Overall Equation:
$C6H12O6+6O2→6CO2+6H2O+ATP$
• Where It Happens:
• Cytoplasm (glycolysis).
• Mitochondria (Krebs cycle and electron transport chain).
• Stages of Cellular Respiration:
• Glycolysis (in cytoplasm):
• Krebs Cycle (Citric Acid Cycle)
• Electron Transport Chain and Oxidative Phosphorylation

Unit 5-Cells

LEARNING OBJECTIVES
By the end of this unit, you should be able to:
• Summarize cell theory.
• Identify cell types.

🧩 KEY CONCEPTS

I. Introduction to Cells
• Definition: Cell is the smallest unit of life.
• Discovery: Hooke, Leeuwenhoek

II. Cell Theory
• Main Tenets:
• All living things are made of cells.
• Cell = basic unit.
• Cells come from pre-existing cells.
• Modern Additions: Energy flow, DNA

III. Basic Structures of All Cells
• Plasma Membrane: Controls movement.
• Cytoplasm: Fluid.
• DNA: Genetic material.