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The Competition

Clownfish in Aquarium



2023 Dates

  • Registration opens: 1/10/2023

  • Registration closes: 4/16/2023

  • Competition date: 5/18/2023 (Tentative and subject to change)

  • Awards ceremony video: TBA

About the Competition

Biology Challenge stimulates curiosity for the natural world and encourages students to take an interest in biology outside of school.


The international competition consists of two, twenty-five-minute multiple choice papers to be taken online (individually) under staff supervised exam conditions.

Questions will be set on the school curriculum, but the competition will also reward those students whose knowledge of the subject has been increased by reading books and magazines, watching natural history programs, taking notice of the news media for items of biological interest, and are generally aware of our natural flora and fauna.

Age 13-15 students (and equivalent age groups worldwide) are eligible. Almost 48,000 students participated in the 2020 Biology Challenge, with many gold, silver, bronze, and commended certificates given every year!

OC Biology will be hosting the Biology Challenge

for the 2022 competition (details coming soon).

2022 Winners

Congratulations to the participants from OC Biology who competed and won at the 2022 international Biology Challenge! 

Gold Medal

Madeleine Chang

Mihir Kulkarni

Isabel Jingyi Lin

Shoubhit Mukherjee

Tanush Paradeshi

Ethan Nguyen-Khoa

Chloe Tan

*Note: names are written in alphabetical order

Silver Medal

Pham Minh Khue Che

Dory Meng

Navya Soni

*Note: names are written in alphabetical order

Bronze Medal

Alexis Chew

Highly Commended

Lawrence Pang


Lindsey Jiang

Mark Wang

*Note: names are written in alphabetical order



2021 Biology Challenge OC Biology Testing Site

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