Biology is nowbeyond the books.
The competitive practice platform for USABO. Work through biology problems, create your own, track your Elo, and see where you stand in the biology world.
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2014 Opens Cell Bio
Ranked1 / 5
Question 1
In the absence of oxygen, yeast cells can obtain energy by fermentation, resulting in the production of which of the following sets of molecules?
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Frequently Asked Questions
What is the difference between a Ranked and Practice Blitz?
Your first attempt will count towards your rating, while the subsequent attempts are just for practice.
How do I build my Streak?
Streaks are exclusively tied to the Problem of the Day (POTD). Completing standard Blitzes contributes to your Elo, but to keep your streak alive, you must solve the official daily problem every 24 hours. Miss a day, and the streak resets.
How is my Elo rating calculated?
Your rating is dynamic. It updates after every full Blitz submission based on your performance relative to the set's difficulty. Perform well on blitzes to increase your rating.
Can you create your own blitzes?
Yep! While Mitosisphere's content writers create a lot of official content for the website, anyone with an account can create ranked blitzes for others to play. We are a tight-knit community, and your contributions help others improve their bio skills.
Is the content aligned with USABO & Campbell?
Yes. As the community creates a LOT of blitzes, there are many that are aligned with the official content areas of USABO. However, that's not the only content that's on the website, as there are other biology and medical exam-related content that many have uploaded.
Is this useful for other biology exams, like AP Biology or medical exams?
Absolutely. While BioBlitz is optimized for the United States Biology Olympiad exam, it is equally useful for other biology-related tests, such as for AP Biology exams, the MCAT, and USMLE.