Today's Bing Quiz

Stuck on a question? Here is a clue for each of today’s 10 Biology questions (Sunday, October 11, 2026). The clues point you in the right direction without giving the answers away — the full answers and explanations appear on your score page after you submit the quiz.

1. Which organelle is known as the “powerhouse of the cell”? Clue: Its name comes from Greek words for “thread” and “grain.” It has a folded inner membrane and even carries its own small loop of DNA, passed down from the mother.
2. Which molecule carries the genetic instructions in most living things? Clue: Its shape is often described as a twisted ladder. Its “rungs” are pairs of bases — A, T, C and G — and their order spells out the instructions.
3. What process do green plants use to make their own food from sunlight? Clue: The name roughly means “putting together with light.” It happens in the chloroplasts of leaves and releases oxygen into the air.
4. How many chambers does the human heart have? Clue: Birds share the same number, and frogs have one fewer. The upper chambers are called atria and the lower ones ventricles.
5. Which part of the blood helps it clot when you get a cut? Clue: They’re tiny cell fragments rather than complete cells. They break off from giant cells in the bone marrow and rush to seal a damaged blood vessel.
6. What is the largest organ of the human body? Clue: Its outer layer is called the epidermis. It is constantly shedding and renewing itself, and it helps control your body temperature.
7. Which naturalist proposed evolution by natural selection in “On the Origin of Species” (1859)? Clue: He sailed around the world aboard HMS Beagle. His observations of finches and tortoises on the Galápagos Islands helped shape his ideas.
8. Which gas do your cells produce as a waste product when they release energy from food? Clue: Plants take this gas in during photosynthesis. It is also the gas that puts the fizz in soft drinks.
9. What are the building blocks of proteins? Clue: The human body uses about 20 common types of them. They are joined together in long chains by peptide bonds.
10. Which kingdom of life do mushrooms belong to? Clue: Yeast and bread mould belong to the same group. Members of this kingdom can’t photosynthesize, and their cell walls contain chitin.