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  - Organic Chemistry
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  - Nuclear Chemistry
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  - Polymer Chemistry
    - Polymerization 5
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  - Theoretical Chemistry
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    - Computational Chemistry 5
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    - Reaction Dynamics 81
    - Electronic Structure 100
    - Molecular Dynamics 19
    - Spectroscopy Theory 5
  - Medicinal Chemistry
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    - Enzyme Inhibition 5
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    - Structure Activity 5
    - Prodrugs 5
    - Natural Products 5
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  - Green Chemistry
    - Sustainable Design 4
    - Renewable Resources 4
    - Waste Prevention 5
    - Energy Efficiency 5
    - Catalysis 4
    - Biodegradable Materials 5
    - Green Synthesis 5
    - Solvent Reduction 5
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  - Materials Chemistry
    - Crystal Structure 6
    - Band Theory 5
    - Materials Polymers 4
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    - Composites 8
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- Biology
  - Cell Biology
    - Cell Theory 12
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    - Cell Membrane 25
    - Cell Wall 5
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    - Cell Division 32
    - Cell Cycle 18
    - Transport Mechanisms 28
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  - Genetics
    - DNA Structure 5
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    - Transcription 5
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    - Mutation 4
    - Mendelian Inheritance 5
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    - Genetic Disorders 7
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    - Genomics 5
    - Epigenetics 5
  - Evolution
    - Origin of Life 9
    - Theories of Evolution 5
    - Natural Selection 6
    - Variation 5
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    - Fossil Record 5
    - Comparative Anatomy 12
    - Molecular Evidence 8
    - Human Evolution 5
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    - Extinction 5
  - Ecology
    - Ecosystem 36
    - Biomes 25
    - Population Ecology 12
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    - Food Chains 16
    - Food Webs 5
    - Ecological Energy Flow 5
    - Nutrient Cycles 13
    - Biodiversity 28
    - Ecological Conservation 47
    - Habitat 5
    - Succession 5
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    - Human Impact 5
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  - Human Anatomy & Physiology
    - Skeletal System 117
    - Muscular System 70
    - Nervous System 124
    - Endocrine System 78
    - Circulatory System 90
    - Respiratory System 44
    - Digestive System 47
    - Excretory System 10
    - Reproductive System 120
    - Immune System 11
    - Integumentary System 21
    - Sensory Organs 56
  - Botany Plant Biology
    - Plant Anatomy 38
    - Plant Morphology 5
    - Plant Physiology 68
    - Photosynthesis 53
    - Plant Reproduction 22
    - Plant Growth 5
    - Plant Hormones 5
    - Plant Taxonomy 43
    - Plant Ecology 19
    - Plant Pathology 6
    - Economic Botany 5
    - Seed Biology 5
    - Plant Genetics 6
    - Plant Adaptations 5
  - Zoology Animal Biology
    - Classification 38
    - Porifera 6
    - Cnidaria 6
    - Platyhelminthes 5
    - Nematoda 6
    - Annelida 7
    - Arthropoda 12
    - Mollusca 5
    - Echinodermata 6
    - Chordata 5
    - Fish 76
    - Amphibians 10
    - Reptiles 14
    - Birds 5
    - Mammals 106
    - Anatomy 2
    - Physiology 27
    - Reproduction 26
    - Development 6
    - Behavior 63
  - Microbiology
    - Microbial Structure 5
    - Bacteriology 33
    - Virology 34
    - Mycology 16
    - Parasitology 59
    - Microbial Genetics 5
    - Microbial Physiology 5
    - Microbial Ecology 11
    - Pathogenic Microbiology 18
    - Microbial Biotechnology 5
    - Food Microbiology 5
    - Industrial Microbiology 5
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  - Biotechnology
    - Bio Genetic Engineering 5
    - Recombinant DNA 5
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    - Stem Cells 5
    - Bioreactors 5
    - Fermentation 5
    - Bioinformatics 6
    - GMOs 5
    - Proteomics 5
    - Metabolomics 5
  - Molecular Biology
    - Biological Biomolecules 8
    - Carbohydrates 6
    - Biochemical Lipids 9
    - Bio Proteins 5
    - Bio Enzymes 21
    - Bio Nucleic Acids 5
    - Biochemical Vitamins 5
    - Bio Minerals 6
    - Bio Metabolism 60
    - Cellular Respiration 22
    - Nitrogen Metabolism 5
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  - Immunology
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  - Developmental Biology
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- Earth & Space Science
  - Geology
    - Minerals 32
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    - Geological Rock Cycle 17
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Exams & Certifications

12th Grade Biology Quizzes, Questions & Answers

Recent Biology Quizzes

Energy Thermodynamics and Cellular Reactions

Questions: 14 | Attempts: 12 | Last updated: Jun 17, 2026

Sample Question
Which of the following best describes the First Law of Thermodynamics?

Energy can be created but not destroyed

The universe is becoming more disordered over time

The total amount of energy in the universe is constant

Entropy always decreases in a closed system

Translation and Three Types of RNA

Questions: 14 | Attempts: 10 | Last updated: Jun 17, 2026

Sample Question
What is the primary function of messenger RNA (mRNA)?

To synthesize proteins directly at the ribosome

To carry DNA information from the nucleus to the cytoplasm

To translate between nucleic acids and amino acids

To form the structural component of ribosomes

History of DNA Structure Discovery

Questions: 30 | Attempts: 10 | Last updated: Jun 17, 2026

Sample Question
Who first isolated and named the substance 'nuclein' from the nuclei of white blood cells in 1869?

Phoebus Levene

Johann Miescher

Frederick Griffith

Edwin Chargaff

Biology Exam Review: Biochemistry & Cell Processes

Questions: 25 | Attempts: 11 | Last updated: Jun 16, 2026

Sample Question
Which of the following molecules CANNOT pass through the phospholipid bilayer without a protein channel?

O₂

CO₂

Na⁺ ions

Small nonpolar lipids

Enzymes Structure Function and Regulation

Questions: 30 | Attempts: 13 | Last updated: Jun 16, 2026

Sample Question
Which of the following best describes the relationship between enzymes and proteins?

All proteins are enzymes and all enzymes are proteins

All enzymes are proteins but not all proteins are enzymes

No enzymes are proteins

All proteins are enzymes but not all enzymes are proteins

Human Anatomy & Physiology Foundational Terms

Questions: 15 | Attempts: 10 | Last updated: Jun 16, 2026

Sample Question
Which anatomical plane divides the body into equal left and right halves?

Frontal plane

Midsagittal plane

Transverse plane

Parasagittal plane

Isomers, Macromolecules & Biochemistry

Questions: 31 | Attempts: 10 | Last updated: Jun 16, 2026

Sample Question
Which type of isomer involves molecules that are non-superimposable mirror images of each other?

Structural isomer

Geometric isomer

Enantiomer

Cis-isomer

Understanding Homeostasis and the Endocrine System

Questions: 32 | Attempts: 11 | Last updated: May 21, 2026

Sample Question
What is homeostasis?

A process of maintaining constant internal conditions

A method of energy production

A type of cellular respiration

A form of external adaptation

Understanding Photosynthesis Processes and Mechanisms

Questions: 28 | Attempts: 11 | Last updated: May 7, 2026

Sample Question
What is the primary function of photosynthesis?

To produce oxygen

To convert light energy into chemical energy

To absorb carbon dioxide

To release energy

Discoveries in DNA Structure and Function

Questions: 8 | Attempts: 10 | Last updated: Apr 29, 2026

Sample Question
Who discovered the presence of 'nuclein' in the nucleus?

Avery

Griffith

Meischer

Hershey

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