Biology 101: Intro to Biology

Course Summary

Take Biology 101: Intro to Biology to earn 3 college credits that can be transferred to over 2,000 colleges and universities. You'll learn all about cell division, the human body, ecosystems and the history of life on Earth. The course is conveniently self paced and mobile friendly.
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22 Chapters in Biology 101: Intro to Biology

22 chapters in Biology 101: Intro to Biology

Course Progress Best Score
Lesson 1 - Structure of the Nucleus: Nucleolus, Nuclear Membrane, and Nuclear Pores Score: {{cp.lessonAssetIdToProgress[2631].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2631].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - The Ribosome: Structure, Function and Location Score: {{cp.lessonAssetIdToProgress[2632].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2632].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - The Endomembrane System: Functions & Components Score: {{cp.lessonAssetIdToProgress[2999].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2999].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - The Cytoskeleton: Microtubules and Microfilaments Score: {{cp.lessonAssetIdToProgress[2633].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2633].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Mitochondria Structure: Cristae, Matrix and Inner & Outer Membrane Score: {{cp.lessonAssetIdToProgress[2634].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2634].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Chloroplast Structure: Chlorophyll, Stroma, Thylakoid, and Grana Score: {{cp.lessonAssetIdToProgress[2635].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2635].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Plant Cell Structures: The Cell Wall and Central Vacuole Score: {{cp.lessonAssetIdToProgress[2636].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2636].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Eukaryotic and Prokaryotic Cells: Similarities and Differences Score: {{cp.lessonAssetIdToProgress[2637].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2637].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Viruses: Bacteriophage Lytic and Lysogenic Cycles Score: {{cp.lessonAssetIdToProgress[2638].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2638].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Protein Synthesis in the Cell and the Central Dogma Score: {{cp.lessonAssetIdToProgress[2564].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2564].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Transcription of Messenger RNA (mRNA) from DNA Score: {{cp.lessonAssetIdToProgress[2565].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2565].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Regulation of Gene Expression: Transcriptional Repression and Induction Score: {{cp.lessonAssetIdToProgress[2566].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2566].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - How An Operon Controls Transcription in a Prokaryotic Cell Score: {{cp.lessonAssetIdToProgress[2567].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2567].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - RNA Processing in a Eukaryotic Cell: Splicing of Introns & Exons Score: {{cp.lessonAssetIdToProgress[2568].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2568].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - What Is the Genetic Code That Translates RNA Into Amino Acids? Score: {{cp.lessonAssetIdToProgress[2569].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2569].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Codon Recognition: How tRNA and Anticodons Interpret the Genetic Code Score: {{cp.lessonAssetIdToProgress[2570].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2570].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Translation of mRNA to Protein: Initiation, Elongation & Termination Steps Score: {{cp.lessonAssetIdToProgress[2571].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2571].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Cellular Respiration: Energy Transfer in Cells Score: {{cp.lessonAssetIdToProgress[330].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[330].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Redox Reactions & Electron Carriers in Cellular Respiration: Definitions and Examples Score: {{cp.lessonAssetIdToProgress[329].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[329].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Glycolysis Pathway: Steps, Products & Importance Score: {{cp.lessonAssetIdToProgress[331].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[331].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - The Citric Acid (Krebs) Cycle: Products and Steps Score: {{cp.lessonAssetIdToProgress[332].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[332].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - The Electron Transport Chain: Products and Steps Score: {{cp.lessonAssetIdToProgress[333].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[333].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Lactic Acid & Alcoholic Fermentation: Comparison, Contrast & Examples Score: {{cp.lessonAssetIdToProgress[2461].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2461].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Chlorophyll: Absorbing Light Energy for Photosynthesis Score: {{cp.lessonAssetIdToProgress[334].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[334].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Photolysis and the Light Reactions: Definitions, Steps, Reactants & Products Score: {{cp.lessonAssetIdToProgress[335].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[335].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Dark Reactions of Photosynthesis: The Calvin-Benson Cycle Score: {{cp.lessonAssetIdToProgress[336].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[336].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - The Genome Score: {{cp.lessonAssetIdToProgress[146].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[146].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - The Structure of Chromosomes Score: {{cp.lessonAssetIdToProgress[147].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[147].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - The Cell Cycle Score: {{cp.lessonAssetIdToProgress[148].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[148].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - DNA Packaging and Chromosome Condensation Score: {{cp.lessonAssetIdToProgress[668].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[668].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Physical Features of a Chromosome Score: {{cp.lessonAssetIdToProgress[672].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[672].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Mitosis I: The Mitotic Spindle Score: {{cp.lessonAssetIdToProgress[337].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[337].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Mitosis II: Phases of Chromosome Segregation Score: {{cp.lessonAssetIdToProgress[338].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[338].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Cytokinesis: Animal Versus Plant Cells Score: {{cp.lessonAssetIdToProgress[342].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[342].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Asexual Versus Sexual Reproduction Score: {{cp.lessonAssetIdToProgress[684].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[684].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Overview of Meiosis Score: {{cp.lessonAssetIdToProgress[339].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[339].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - Meiosis I: Reductional Cell Division Score: {{cp.lessonAssetIdToProgress[692].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[692].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - Meiosis II: Equational Cell Division Score: {{cp.lessonAssetIdToProgress[691].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[691].bestScoreQuestions}}  Take Quiz Optional
Lesson 13 - Nondisjunction and Aneuploidy Score: {{cp.lessonAssetIdToProgress[341].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[341].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Multicellular Organisms, Tissues and Epithelium Score: {{cp.lessonAssetIdToProgress[1178].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[1178].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Types of Connective Tissue Score: {{cp.lessonAssetIdToProgress[1179].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[1179].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Skeletal System and Muscular System Score: {{cp.lessonAssetIdToProgress[372].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[372].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - The Human Circulatory System: Parts and Functions Score: {{cp.lessonAssetIdToProgress[3168].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3168].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Gas Exchange in the Human Respiratory System Score: {{cp.lessonAssetIdToProgress[373].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[373].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Digestive System I: The Upper Gastrointestinal Tract Score: {{cp.lessonAssetIdToProgress[377].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[377].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Digestive System II: The Lower Gastrointestinal Tract Score: {{cp.lessonAssetIdToProgress[378].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[378].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Excretory System Score: {{cp.lessonAssetIdToProgress[379].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[379].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - What is Respiration? - Definition, Process & Equation Score: {{cp.lessonAssetIdToProgress[16995].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[16995].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Homeostasis and Temperature Regulation in Humans Score: {{cp.lessonAssetIdToProgress[382].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[382].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Homeostasis of Glucose Levels: Hormonal Control and Diabetes Score: {{cp.lessonAssetIdToProgress[383].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[383].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Functions of the Nervous System Score: {{cp.lessonAssetIdToProgress[1299].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[1299].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - The Structure and Function of Neurons Score: {{cp.lessonAssetIdToProgress[364].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[364].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - The Central and Peripheral Nervous Systems Score: {{cp.lessonAssetIdToProgress[366].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[366].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Parts of the Brain Score: {{cp.lessonAssetIdToProgress[16].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[16].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Innate Immunity: Inflammation, Neutrophils & Natural Killer Cells Score: {{cp.lessonAssetIdToProgress[380].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[380].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Acquired Immunity: T Cells, B Cells and Antibodies Score: {{cp.lessonAssetIdToProgress[381].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[381].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Antibiotics and Vaccines Score: {{cp.lessonAssetIdToProgress[1719].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[1719].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Flu Viruses, HIV and Immune System Evasion Score: {{cp.lessonAssetIdToProgress[2027].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2027].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - Pathogens: Antibiotic Resistance and Virulence Score: {{cp.lessonAssetIdToProgress[2028].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2028].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Overview of Genetics Score: {{cp.lessonAssetIdToProgress[394].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[394].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Properties of Alleles Score: {{cp.lessonAssetIdToProgress[395].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[395].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Mendel's First Law & Its Application Score: {{cp.lessonAssetIdToProgress[50370].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[50370].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Mendel's Second Law: The Law of Independent Assortment Score: {{cp.lessonAssetIdToProgress[398].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[398].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Application of Mendel's Second Law Score: {{cp.lessonAssetIdToProgress[399].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[399].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Exceptions to Simple Dominance: Codominance and Incomplete Dominance Score: {{cp.lessonAssetIdToProgress[665].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[665].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Exceptions to Independent Assortment: Sex Linked and Sex Limited Traits Score: {{cp.lessonAssetIdToProgress[666].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[666].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Chromosomal Linkage and Crossing Over Score: {{cp.lessonAssetIdToProgress[667].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[667].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Human Genetics and Model Organisms Score: {{cp.lessonAssetIdToProgress[1177].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[1177].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Complementary Base Pairing: Definition & Explanation Score: {{cp.lessonAssetIdToProgress[3470].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[3470].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - The Environment, Levels of Ecology and Ecosystems Score: {{cp.lessonAssetIdToProgress[405].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[405].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Ecosystems, Habitats and Ecological Niches Score: {{cp.lessonAssetIdToProgress[410].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[410].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Food Chains, Trophic Levels and Energy Flow in an Ecosystem Score: {{cp.lessonAssetIdToProgress[414].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[414].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Interspecific Competition, Competitive Exclusion & Niche Differentiation Score: {{cp.lessonAssetIdToProgress[2177].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2177].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Predator/Prey Interactions, Camouflage, Mimicry & Warning Coloration Score: {{cp.lessonAssetIdToProgress[2175].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2175].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Symbiotic Relationships: Mutualism, Commensalism & Parasitism Score: {{cp.lessonAssetIdToProgress[413].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[413].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Populations: Density, Survivorship and Life Histories Score: {{cp.lessonAssetIdToProgress[2178].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2178].bestScoreQuestions}}  Take Quiz Optional
Lesson 8 - Carrying Capacity, Migration & Dispersion Score: {{cp.lessonAssetIdToProgress[411].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[411].bestScoreQuestions}}  Take Quiz Optional
Lesson 9 - Dispersal, Colonization, and Island Biogeography Score: {{cp.lessonAssetIdToProgress[417].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[417].bestScoreQuestions}}  Take Quiz Optional
Lesson 10 - Conservation Biology, Habitat Fragmentation, and Metapopulations Score: {{cp.lessonAssetIdToProgress[2369].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2369].bestScoreQuestions}}  Take Quiz Optional
Lesson 11 - Ecological Succession: From Pioneer to Climax Communities Score: {{cp.lessonAssetIdToProgress[416].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[416].bestScoreQuestions}}  Take Quiz Optional
Lesson 12 - How Introduced and Invasive Species Alter Ecological Balance Score: {{cp.lessonAssetIdToProgress[2173].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[2173].bestScoreQuestions}}  Take Quiz Optional
Course Progress Best Score
Lesson 1 - Theory of Evolution Score: {{cp.lessonAssetIdToProgress[419].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[419].bestScoreQuestions}}  Take Quiz Optional
Lesson 2 - Hardy Weinberg Equilibrium: Definition, Equation & Evolutionary Agents Score: {{cp.lessonAssetIdToProgress[50381].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[50381].bestScoreQuestions}}  Take Quiz Optional
Lesson 3 - Natural Selection and Adaptation Score: {{cp.lessonAssetIdToProgress[425].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[425].bestScoreQuestions}}  Take Quiz Optional
Lesson 4 - Types of Natural Selection Score: {{cp.lessonAssetIdToProgress[427].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[427].bestScoreQuestions}}  Take Quiz Optional
Lesson 5 - Speciation I: Allopatric and Sympatric Speciation Score: {{cp.lessonAssetIdToProgress[428].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[428].bestScoreQuestions}}  Take Quiz Optional
Lesson 6 - Speciation II: Prezygotic Barriers Score: {{cp.lessonAssetIdToProgress[429].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[429].bestScoreQuestions}}  Take Quiz Optional
Lesson 7 - Speciation III: Postzygotic Barriers Score: {{cp.lessonAssetIdToProgress[430].bestScoreCorrect}}/{{cp.lessonAssetIdToProgress[430].bestScoreQuestions}}  Take Quiz Optional
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Practice Final Exam
Biology 101: Intro to Biology
Status: Not Started
Practice Chapter Exams
Ch. 1:  Science Basics
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Ch. 2:  Inorganic Chemistry Review for Biology
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Ch. 3:  Organic Chemistry Introduction
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Ch. 4:  Nucleic Acids: DNA and RNA
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Ch. 5:  Enzymatic Biochemistry
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Ch. 6:  Cell Membranes
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Ch. 7:  Cell Structure and Organelles
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Ch. 8:  DNA Replication: Processes and Steps
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Ch. 9:  Transcription and Translation Processes
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Ch. 10:  Genetic Mutations
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Ch. 11:  Metabolic Biochemistry
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Ch. 12:  Cell Division
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Ch. 13:  Physiology I: The Musculoskeletal, Circulatory, Respiratory, Digestive, and Excretory Systems
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Ch. 14:  Physiology II: The Nervous and Endocrine Systems
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Ch. 15:  Reproduction and Development in Animals
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Ch. 16:  Genetics: Principles of Heredity
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Ch. 17:  Ecological Principles
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Ch. 18:  Principles of Evolution
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Ch. 19:  Earth's Timeline and Evolution
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Ch. 20:  Phylogeny and Organism Classification
Chapter too short for exam
Ch. 21:  Molecular Biology Lab Techniques
Chapter too short for exam
Ch. 22:  Studying for Biology 101
Chapter too short for exam