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    - Reaction Dynamics 81
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  - Green Chemistry
    - Sustainable Design 4
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  - Materials Chemistry
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- Biology
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  - Genetics
    - DNA Structure 5
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    - Transcription 5
    - Translation 5
    - Mutation 4
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  - Evolution
    - Origin of Life 9
    - Theories of Evolution 5
    - Natural Selection 6
    - Variation 5
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    - Comparative Anatomy 12
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  - Ecology
    - Ecosystem 36
    - Biomes 25
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    - Food Chains 16
    - Food Webs 5
    - Ecological Energy Flow 5
    - Nutrient Cycles 13
    - Biodiversity 28
    - Ecological Conservation 47
    - Habitat 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
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    - Plant Taxonomy 43
    - Plant Ecology 19
    - Plant Pathology 6
    - Economic Botany 5
    - Seed Biology 5
    - Plant Genetics 6
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  - 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
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    - Industrial Microbiology 5
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  - Biotechnology
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    - Stem Cells 5
    - Bioreactors 5
    - Fermentation 5
    - Bioinformatics 6
    - GMOs 5
    - Proteomics 5
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  - 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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    - Antigens 6
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  - Developmental Biology
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10th Grade Biochemistry Quizzes, Questions & Answers

Recent Biochemistry Quizzes

Biology 9. Elements, Water and Carbohydrates

Questions: 36 | Attempts: 576 | Last updated: Sep 1, 2025

Sample Question
Which of the following is the most abundant element in living things?

Carbon

Hydrogen

Oxygen

Nitrogen

Phosphorus

Chapter 2 Section 4 Review

Questions: 8 | Attempts: 416 | Last updated: Mar 21, 2025

Sample Question
In humans, carbon dioxide and water quickly combine to form carbonic acid in the presence of a particular enzyme. Most likely, this same enzyme

Helps in the breakdown of acidic foods in the stomach

Is not involved in other types of reactions because enzymes are specific

Is involved in other reactions where temperature and pH are the same

Helps in the synthesis of sugars during photosynthesis

Biology Test 2 Part 1

Questions: 14 | Attempts: 191 | Last updated: Mar 21, 2025

Sample Question
CHNOPS are

The only atoms found in nonliving and living things

The only atoms found in living things.

Atoms basic to life.

Atoms found in rocks.

The only atoms found in nonliving and living things,as well as atoms basic to life.

A.P. Biology Chapter 4 (Carbon Chemistry)

Questions: 30 | Attempts: 4650 | Last updated: Sep 6, 2025

Sample Question
What does it mean if a substance is organic?

The substance contains oxygen

The substance contains carbon

The substance is dead

The substance is living

A.P. Biology Chapter 2 (Chemistry Review)

Questions: 35 | Attempts: 7099 | Last updated: Mar 21, 2025

Sample Question
What are elements?

The simplest category of matter

The result of combining 2 compounds

Components which make up an atom

None of the above

If You Pass This Biology Test, You Are A Legit Biology Enthusiast!

Questions: 45 | Attempts: 1606 | Last updated: Mar 20, 2025

Sample Question
Organic compounds contain

Carbon and usually other elements

Many kinds of elements except carbon

Only carbon

Only carbon and hydrogen

Chapter 7 & 8 Biology

Questions: 15 | Attempts: 188 | Last updated: Aug 20, 2025

Sample Question
Center of an atom:

Nucleus

Enzyme

Nucleolus

Take The Hardest Chemistry Practice Test! Quiz

Questions: 40 | Attempts: 643 | Last updated: Mar 20, 2025

Sample Question
From the assigned reading in Todar’s online book of Bacteriology, microbes impact human lives and the environment in many ways however, the most significant impact of microorganisms on earth is the ability to recycle the primary elements found in all living things. These primary elements are oxygen, as well as _______ and __________.

Sulfur

Nitrogen

Oxygen

Carbon

B and D

Chemical Reactions and Enzymes

Questions: 13 | Attempts: 1754 | Last updated: Mar 21, 2025

Sample Question
The element or compounds that that enter into a chemical reaction are...

Reactant

Product

Substrate

Carbohydrates and Proteins

Questions: 4 | Attempts: 567 | Last updated: Mar 20, 2025

Sample Question
Which of the following are unsaturated fatty acids?

Lard, bacon grease

Wax, cholesterol

Olive oil, fish oil

Butter, hydrogenated vegetable oil

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