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Principles of Biology: Study Guide for Unit 1 – Biological Molecules, Chemistry, and Membranes

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Scientific Method

  • Scientific Method Example 1
    01:35
  • Basic Theories of Biology
    03:03
  • Scientific Method
    06:29

Experimental Design

  • Variables
    07:36
  • Experimental Design Example 1
    02:50
  • Negative & Positive Controls
    07:42

Atoms - Smallest Unit of Matter

  • Atoms- Smallest Unit of Matter Example 1
    02:13
  • Atoms- Smallest Unit of Matter Example 3
    03:51
  • Electron Orbitals & Energy Shells
    09:44

Introduction to Chemical Bonding

  • Introduction to Chemical Bonding Example 1
    1:59
  • Intramolecular vs. Intermolecular Bonds
    03:53
  • Map of the Lesson on Chemical Bonding
    02:42

Hydrogen Bonding

  • Hydrogen Bonding
    05:03

Introduction to Water

  • Introduction to Water
    01:54
  • Introduction to Water Example 1
    01:51
  • Emergent Properties of Water
    01:29

Acids and Bases

  • Acids
    02:45
  • Acids and Bases
    01:29
  • Bases
    03:48

pH Scale

  • Buffers
    05:38
  • pH Scale
    11:05

Functional Groups

  • Functional Groups Example 1
    02:00
  • Functional Groups
    06:04

Introduction to Energy

  • Thermodynamics: System vs. Surroundings
    04:21
  • Introduction to Energy
    04:58

Laws of Thermodynamics

  • Second Law of Thermodynamics
    02:53
  • Entropy
    03:21
  • First Law of Thermodynamics
    04:43

Chemical Reactions

  • Chemical Reactions
    01:56
  • Types of Chemical Reactions
    05:48

Proteins

  • Protein Structure
    08:02
  • Amino Acids
    04:37
  • Proteins
    02:50

Enzymes

  • Functions of Enzymes
    02:32
  • Enzymes Example 1
    02:25
  • Enzymes
    02:55

Nucleic Acids

  • Nucleic Acids Example 2
    01:05
  • Formation & Breakdown of Nucleic Acids
    04:07
  • DNA vs. RNA
    05:57

Carbohydrates

  • Formation & Breakdown of Polysaccharides
    03:08
  • Carbohydrates
    04:53
  • Carbohydrate Functions
    05:08

Lipids

  • Steroids & Waxes
    03:30
  • Lipids
    04:19
  • Fatty Acids
    06:59

Biological Membranes

  • Biological Membranes Example 1
    02:21
  • Biological Membranes
    06:04

Concentration Gradients and Diffusion

  • Diffusion
    02:44
  • Concentration Gradients and Diffusion
    04:51

Osmosis

  • Osmosis Example 1
    02:18
  • Osmosis
    05:59
  • Direction of Osmosis
    06:48

Introduction to Membrane Transport

  • Map of the Lesson on Membrane Transport
    02:33
  • Introduction to Membrane Transport
    02:47
  • Which Molecules Freely Cross Membranes?
    07:10

Passive vs. Active Transport

  • Classes of Membrane Transport Proteins
    03:28
  • Passive vs. Active Transport
    04:18

Simple and Facilitated Diffusion

  • Simple and Facilitated Diffusion
    05:10
  • Transport Proteins of Facilitated Diffusion
    04:49

Active Transport

  • Secondary Active Transport
    07:06
  • Active Transport
    02:37
  • Primary Active Transport
    02:53