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Biology Trivia Questions and Answers
10 free biology trivia questions with answers and explanations.
1What is the powerhouse of the cell?
ACell membrane
BChloroplast
CMitochondria✓
DNucleus
💡 Explanation: Mitochondria are called the "powerhouse of the cell" because they produce ATP (adenosine triphosphate), the energy currency of cells.
2How many chromosomes do humans have?
A23
B44
C46✓
D48
💡 Explanation: Humans have 46 chromosomes (23 pairs). One chromosome from each pair comes from each parent. Chromosome 23 determines biological sex.
3What is DNA short for?
ADeoxyribonucleic Acid✓
BDynamic Nuclear Acid
CDeoxyribose Nucleotide Acid
DDigital Nucleic Acid
💡 Explanation: DNA stands for Deoxyribonucleic Acid. It is the molecule that carries genetic information and instructions for all living organisms.
4Which scientist first proposed the theory of evolution by natural selection?
AGregor Mendel
BCharles Darwin✓
CLouis Pasteur
DCarl Linnaeus
💡 Explanation: Charles Darwin published "On the Origin of Species" in 1859, proposing that all species evolve through the process of natural selection.
5Which part of a plant cell carries out photosynthesis?
AChloroplast✓
BNucleus
CRibosome
DCell wall
💡 Explanation: Chloroplasts contain chlorophyll, the green pigment that captures sunlight and powers photosynthesis.
6What is the smallest unit of life that can function on its own?
AAtom
BCell✓
COrgan
DTissue
💡 Explanation: The cell is the basic unit of life. Some organisms, like bacteria, are a single cell, while humans are made of trillions.
7Which blood cells help the body fight infection?
ARed blood cells
BPlatelets
CWhite blood cells✓
DNerve cells
💡 Explanation: White blood cells are part of the immune system and attack bacteria, viruses and other invaders. Red blood cells carry oxygen and platelets help blood clot.
8What is the process called when one cell divides into two identical daughter cells?
AMeiosis
BOsmosis
CFermentation
DMitosis✓
💡 Explanation: In mitosis a cell copies its chromosomes and splits into two genetically identical cells. Meiosis produces sex cells with half the chromosomes.
9Which protein in red blood cells carries oxygen around the body?
AHemoglobin✓
BInsulin
CKeratin
DCollagen
💡 Explanation: Hemoglobin binds to oxygen in the lungs and releases it in body tissues. It contains iron, which gives blood its red color.
10What is the scientific study of fungi called?
ABotany
BMycology✓
CZoology
DEcology
💡 Explanation: Mycology is the study of fungi, including mushrooms, yeasts and molds. Botany studies plants and zoology studies animals.
About Biology Trivia Questions
These biology trivia questions cover a wide range of topics within the biology category. All questions include four multiple-choice options (A, B, C, D) and a detailed answer explanation to help you understand the topic better.
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