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Biology Quiz

Enter the answers based on the prompt. There are 5 difficulties: Extremely easy (dark blue), easy (blue), medium (yellow), hard (red), and Certified Nerd (black).
The difficulties are relative to people who have good knowledge on biology, not just anybody.
Quiz by
qEight
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Last updated: April 2, 2026
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First submittedApril 1, 2026
Times taken155
Average score43.3%
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Hint/Question
Answer
The mitochondrion is the _
powerhouse of the cell
State one thing essential for (most) living organisms.
✓
What cells send signals the brain?
Neurons
Smallest biological component of our bodies.
Cells
State one internal organ.
✓
Number of bones in an adult male.
206
What colour is the brain?
Grey
Chromosomes that make a male.
XY
What do red blood cells do?
Carry oxygen
Taxonomic kingdom of humans.
Animalia
Scientific name for humans.
Homo sapiens
How many total cells are in the human brain?
171 Billion
Alternative name for cell division.
Mitosis
Name one taxonomic ranking.
✓
How many ants are on the planet?
20 Quadrillion
Animal with the highest estimated lifespan (excluding brainless creatures).
Greenland shark
One of the two animals tied for highest genetic similarity to humans.
✓
What is the cell nucleus?
The control centre
How many amino acid "letters" are there?
22
Scientific name for the brain eating amoeba.
Naegleria fowleri
Maximum memory capacity of the brain in computer terms.
2.5 - 5.5 Petabytes
The cell type in the brain that is not neurons.
Glial cells
Unacronymise DNA
Deoxyribonucleic acid
Part of the body that controls hemogenesis.
Bone marrow
Number of letters in the complete name for the protein titin.
189,819
Scientific name for the cat that was moved out of the genus Felis.
Otocolobus manul
What is the rarest blood type?
Rh-null
The amount of people documented that have said blood type.
50-100
What is the name of the smartest bonobo?
Kanzi
Largest single-celled organism.
Caulerpa taxifolia
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