General Biology Study Guide: Core Concepts and Laboratory Skills

CH 1: Foundational Skills, Scientific Method and Tools of Biology

Scientific Method and Experimental Design

• Scientific Method: A systematic approach to inquiry involving observation, hypothesis formation, experimentation, and analysis.

• Variables: Independent variable is manipulated; dependent variable is measured; controls are constants.

• Data Analysis: Use of tables and graphs to interpret experimental results. Understand the difference between qualitative and quantitative data.

• Scientific Reasoning: Drawing logical conclusions from data and evaluating the validity of results.

• Ethics in Science: Consideration of the impact of scientific research on society and the environment.

CH 2: The Chemistry of Life & CH 3: The Molecules of the Cell

Atoms, Molecules, and Chemical Bonds

• Atoms: Basic units of matter, composed of protons, neutrons, and electrons.

• Molecules: Combinations of atoms held together by chemical bonds (ionic, covalent, hydrogen bonds).

• Water: Unique properties due to hydrogen bonding; essential for life.

• pH Scale: Measures acidity/alkalinity; biological systems require specific pH ranges.

Biological Macromolecules

• Carbohydrates: Sugars and starches; energy storage and structure.

• Lipids: Fats, oils, phospholipids; energy storage, membrane structure.

• Proteins: Made of amino acids; enzymes, structure, transport.

• Nucleic Acids: DNA and RNA; genetic information storage and transfer.

Organic Chemistry in Biology

• Functional Groups: Specific groups of atoms within molecules that determine chemical reactivity (e.g., hydroxyl, carboxyl, amino, phosphate).

LAB:

• Identification of macromolecules using chemical tests (e.g., Benedict's for sugars, Biuret for proteins).

CH 4: A Tour of the Cell & CH 5: Membrane Transport

Cell Structure and Function

• Cell Theory: All living things are composed of cells; cells are the basic unit of life.

• Prokaryotic vs. Eukaryotic Cells: Prokaryotes lack a nucleus; eukaryotes have membrane-bound organelles.

• Microscopy: Use of microscopes to observe cell structure and estimate size.

• Organelles: Structure and function of nucleus, mitochondria, chloroplasts, ER, Golgi apparatus, lysosomes, etc.

Membrane Structure and Transport

• Plasma Membrane: Phospholipid bilayer with embedded proteins; selectively permeable.

• Transport Mechanisms: Diffusion, osmosis, facilitated diffusion, active transport.

• Osmosis: Movement of water across membranes; importance in cell volume regulation.

LAB:

• Microscope use, cell size estimation, osmosis and diffusion experiments.

CH 5/10/11: Enzymes and Energy

Enzyme Structure and Function

• Enzymes: Biological catalysts that speed up chemical reactions by lowering activation energy.

• Active Site: Region where substrate binds and reaction occurs.

• Factors Affecting Enzyme Activity: Temperature, pH, substrate concentration, inhibitors.

Energy in Biological Systems

• ATP: Main energy currency of the cell; produced during cellular respiration.

• Metabolism: Sum of all chemical reactions in an organism; includes catabolism and anabolism.

LAB:

• Enzyme activity experiments (e.g., catalase and hydrogen peroxide).

CH 6: Cell Respiration and Fermentation

Overview of Cellular Respiration

• Stages: Glycolysis, Krebs Cycle (Citric Acid Cycle), Electron Transport Chain.

• Equation: $C_6H_{12}O_6 + 6O_2 \rightarrow 6CO_2 + 6H_2O + \text{ATP}$

• Aerobic vs. Anaerobic Respiration: Aerobic uses oxygen; anaerobic (fermentation) does not.

• Fermentation: Produces lactic acid or alcohol; less efficient than aerobic respiration.

LAB:

• Yeast fermentation experiments (e.g., measuring CO2 production).

CH 7: Photosynthesis: Using Light to Make Food

Photosynthesis Process

• Equation: $6CO_2 + 6H_2O + \text{light energy} \rightarrow C_6H_{12}O_6 + 6O_2$

• Light Reactions: Capture solar energy, produce ATP and NADPH.

• Calvin Cycle: Uses ATP and NADPH to synthesize glucose from CO2.

• Chlorophyll: Main pigment involved in capturing light energy.

LAB:

• Experiments with Elodea and indicators to observe photosynthesis.

Additional info:

• This syllabus outlines foundational concepts and laboratory skills for a General Biology course, covering scientific methods, chemistry of life, cell structure, metabolism, and energy transformations.