300 Biology Trivia Questions and Answers

Biology is studying everything about life and its participants. What do you know about life and its participants? From cells, photosynthesis, ecology, botany, evolution, genetics, DNA to viruses and bacteria, biology is undoubtedly one of the most interesting subjects.

Thanks to biology, we understand how food moves from the mouth all the way to the small intestines, how many bones an adult human has, how important carbon dioxide is for that beautiful green plant on your balcony, and many other things.

Biology Trivia Questions and Answers

How much do you know as far as this field of science is concerned? Well, knowing that the heart beats 72 times per minute, and it has four ventricles is not enough. There’s so much to learn and our trivia questions will definitely help you, whether you want to remind yourself what you learned in school or you have an upcoming biology test, and you really want to ace it.

These trivia questions will come in handy as you spend quality time with your family and friends during the weekends. High school students will benefit so much from them and the next time they have a quiz in class,  they’ll definitely show off with nothing but the correct answers only.

Where’s your lab coat? Let’s get into action already and see what your score would be!

1. What is the most common element in the human body?



2. What is another name for the voice box?



3. Hansen’s disease is more commonly known by which name?



4. What is the scientific term for the production of light by living organisms?



5. About how long is the human small intestine?

18 Feet


6. Botany is the study of what life form?



7. Unlike most other fish, sharks have no?



8. What is the process of breaking down food called?



9. What is the human body’s largest organ?



10. What human organ cleans fifty gallons of blood every day?



11. Where would you find the Nazca Lines?



12. True or false: snails have teeth



13. How many gallons of water can a baobab tree store in its trunk?

32,000 gallons


14. What is a “jonquil”?

A Garden Plant


15. What part of the human body is the Mandible?

Lower Jawbone


16. What illness accounted for 40 percent of U. S. military casualties during World War I?



17. What is the expected time an organism will live called?

Life Span


18. How many bones does an adult human have?



19. Which organ do insects NOT have?



20. What are the tiny blood vessels that connect arteries and veins?



21. True or false: jellyfish have hearts



22. What living animal has the heaviest brain?

Sperm Whales


23. What are chitterlings?

The Intestines Of A Pig


24. Which French microbiologist discovered the process of pasteurization?

Louis Pasteur


25. What is the scientific term for an apparent “throwback” characteristic of an organism that reveals a trait of an earlier ancestor?



26. What part of the plant gets water and nutrients to the rest of the plant?



27. What year was the first animal cloned?



28. What is the waxy covering on plant leaves?



29. Who discovered penicillin?

Alexander Fleming


30. Which of the following has more bones? Adult, Baby, Teenager



31. Which is the sheet-like muscle at the bottom of a human chest?



32. When was the Human Genome project completed?



33. What was the first genetically engineered organism?

Tobacco plant


34. What do poachers seek when they kill elephants for their tusks?



35. How many species are estimated to live on Earth?



36. How many functions does the human liver have?

More than 500 separate functions


37. What takes up 50-70 percent of a whale’s weight?



38. A DNA molecule is described as being in what shape?

Double helix


39. Which of the following has the longest recorded life span?

Freshwater Oyster


40. The first vaccine targeted which disease?



41. Heterochromia results in which change in physical appearance?

Different colored eyes


42. What is the only human body part that can’t repair itself?



43. What science word means “to group”?



44. Crohn’s disease is part of which disease group?

Inflammatory bowel disease


45. Which fruit is a hybrid of the pomelo and mandarin?

The orange


46. What body system is the human heart part of?

Circulatory System


47. How many neck vertebrae do giraffes have, compared to a human’s seven?



48. What type of organism makes up the oldest known fossil?

Blue-green algae


49. What vitamin does the sun’s ultraviolet rays help the skin produce?

Vitamin D

50. Which food substance helps move waste through the body?

51. What does the Scoville Heat Unit Scale measure?

The pungency (spicy heat) of chilli peppers


52. What makes up about 70 percent of most living things?



53. The term ‘renal’ refers to which organs?



54. Is a tomato a fruit or vegetable?

A fruit


55. What is the largest crocodilian in the world?

Saltwater Crocodile


56. What is the name of the biggest part of the human brain?

The cerebrum


57. What is the collective name of animals and plants that live on a lake bottom?​​​​​​​



58. Fish take in oxygen through their gills; what do insects take in oxygen through?



59. Can cell walls be found in plant cells, animal cells or both?

Plant cells


60. What is the hardest substance in the human body?

Tooth enamel


61. What is the correct plural of Keeshond?



62. What is the phobia of eyes called?



63. What is the largest living structure on Earth?​​​​​​​

The Great Barrier Reef


64.  What is the biggest artery in the human body?



65.  What gives blood its red color?

The porphyrin ring attached to iron in Hemoglobin


66. In terms of attributed human deaths which are more dangerous; snakes, bees, sharks or house flies?

House flies


67. What fluid-filled sac surrounds the human embryo?

Amniotic Sac


68. Which is the hardest bone in the human body?

The jawbone


69. What is the oldest living thing known on Earth?​​​​​​​

A bristlecone pine in California


70. Which is a tiny structure located in the cytoplasm of a cell?



71. How many gallons of blood are in the human body?

1.2-1.5 gallons or ten units


72. Where are the three smallest bones in the human body? What are they called?

The middle earmalleus (hammer), incus (anvil) & stapes (stirrup)


73. What happens to your skin’s blood vessels as you exercise?

They Widen


74. Which organ in the body can process pain but cannot feel it?

The brain


75. What is the world’s tallest grass?



76. What powdery substance contains the male sex cells of a flower?



77. How many bones are we born with, and how many does it reduce to?

300 at birth, this reduces to 206


78. Which Australian timber made the London docks?



79. What are the members of a single type of living organism in an ecosystem called?



80. Nucleus + Cytoplasm = ?



81. What is the longest type of cell in the body?

The nerve cell


82. What snail-shaped organ in the ear funnels sounds to the auditory nerve?



83. What is the lipid membrane model of the cell membrane called?

The fluid mosaic model


84. What is a xylem?​​​​​​​

The hollow woody tissue in plants that carries water and minerals


85. What kingdom would a human be in?



86. What part of the cell’s covering do plant cells have that animal cells don’t?

Cell wall


87. What is pyrogen?

A substance produced by bacteria, that causes fever


88. What is a full set of bones called?



89. Which protein helps in the degradation of aged and damaged cells by targeting them to be destroyed?



90. What is the scientific name of a Sydney Blue Gum?​​​​​​​

Eucalyptus saligna


91. From what tree did aspirin originally derive?



92. How many different cells are there in our body?



93. Which is the only Australian mammal restricted to alpine environments?​​​​​​​

The Mountain Pygmy Possum


94. What was the largest living creature of the twentieth century?

Blue Whale


95. Which branch of science helps us take a closer look at cells?



96. What is the name given for the black & white disc used in determining water turbidity?

A Secchi disc


97. What organ filters blood and helps regulate salt and water levels?



98. Which cells make new bones?



99. Why does eyesight change as you get older?

The eye’s lens continues to grow throughout life, becoming thicker and less transparent.

100. What process produces a duplicate of the original cell?



101. What are the important biomolecules?

Proteins, Nucleic Acids, Carbohydrates and Lipids


102.  Do you have the same number of neck vertebrae as a giraffe?



103. What is the cell where a virus reproduces called?

Host Cell


104. Are all proteins enzymes?



105. What is the smallest living mammal?

The Etruscan Shrew at about 2.5cm


106. What is the Japanese word for “dog”?



107. Which is the division of chemical biology that studies sugar molecules?



108. Which two mammals lay eggs?

The echidna and the platypus


109. By what process do plants use chlorophyll to make glucose, a food sugar?



110. What is the enzyme that facilitates the transfer of a phosphate group to a protein substrate?



111. How many known species of fish live in the ocean?



112. What forms the outer boundary of a cell and controls material moving in and out of the cell?

Cell Membrane


113. What is the name of the protein that was taken from a jellyfish, which helps visualize proteins under a microscope?

Green fluorescent protein


114. What is the largest known insect?

The Phryganistra chinensis Zhao


115. What is the outer skeleton of organisms such as spiders and insects called?



116. What type of octopus is capable of imitating jellyfish, sea snakes, and flounders?

The mimic octopus


117. Which mammal can fly?

The Bat


118. What is the tube that carries food into the stomach called?



119. What are the two pom-poms of boxer crabs?



120. What is the top speed of a cheetah?

120 km/h


121. Which cell part is responsible for controlling most of the activity inside a cell?



122. What is the name of a water-dwelling animal that looks like it’s wearing lipstick?

Red-lipped batfish


123. What do you call a cross between a tiger and a lion?



124. What is the leading male or female called in a pack of wolves?



125. Which fish was awarded the title of the world’s ugliest animal?



126. When was the structure of DNA discovered?



127. What does ER (of a cell) stand for?

Endoplasmic Reticulum


128. Who is the Father of modern marine biology?

James Cook


129. What is studied in forensic palynology?

Pollen and spores


130. What is the only canine that can climb trees?

Gray Fox


131. Are all invertebrates cold-blooded?



132. What is studied in forensic entomology?



133. How many bones are in each finger, except the thumb, of a human hand?



134. What is the branch of science that studies plants called?



135. The name rhinoceros comes from two ancient Greek words meaning what?

Nose-horn. Rhino means nose, and keras means horn


136. What are the gaps between nerve cells called?



137. Which part of the plant cell is used for storage?



138. Sometimes two different living things live together and have very close relationships. What do scientists call this?



139. What is the outside covering of a plant’s root called?

Root Epidermis


140. Which component of a plant cell helps in photosynthesis?



141. True or False: The “fresh” smell after it’s been raining comes from trees breathing



142. What substance in your ears helps keep germs and dirt out?



143. What type of organism is a plant, in terms of cells?



144. Most of the Earth’s oxygen is made by one kind of living thing. Which kind of living thing is it?



145. What is the sticky part of the pistil called?



146. What is the scientific name of one of the rarest plants in the world, which is also known as the corpse plant? Where can it be found?

Rafflesia arnoldii


147. Some dinosaurs survived the extinction event 65 million years ago, and persist on Earth to this day. What do we call them?



148. Where in the human body are the anvil and stirrups located?



149. Why is the Dragon’s Blood Tree, which is found on an island in Yemen, called so?

Its sap is blood-red in color

150. Which is the world’s largest living thing? An animal, fungus, plant, or bacteria?


151. What is the fin on the backs of fish, some whales and dolphins called?

Dorsal Fin


152. Which plant is known as Monkey Cups and is a carnivore?



153. The scientific study of animals is called?



154. Where does the zygote of a gymnosperm develop?

In The Ovule


155. What is the hair-like structure that occurs on plants, which are similar to the one seen on mammals?



156. True or false: We find more shark-tooth fossils than shark-bone fossils.



157. What is the nerve that helps transmit sound signals to your brain?



158. What plant is considered to be a living fossil and is said to survive for 1000 to 2000 years with just around three inches of rain a year?

Welwitschia mirabilis


159. True or false: Cabbage, Brussel sprouts, broccoli, kale, and cauliflower were all bred from the same wild plant.



160. What is the name for a virus that infects a bacteria?



161. What is the name of the purple-colored flower that loves the shade and is scientifically called Torenia?

Wishbone flower


162. From how far away can a blue whale hear sounds?

160 km


163. What “trapdoor” on your windpipe helps keep out food particles?



164. What are flowering plants called?



165. The brain is divided into how many lobes?



166. What flower name is similar to the processor we use in our electronic gadgets?



167. What is a cell that provides energy for another organism called?

Host Cell


168. When we cut onions, we start tearing up. Which chemical compound is the culprit behind this?

Sulfuric compounds


169. How many joints does an ant have in each leg?



170. Which plant bulbs were valued more than gold in the 1600s?



171. What openings in a leaf allow gas exchange?



172. Which scientist is best known for his theory of evolution by natural selection, which is the foundation of modern evolutionary science?

Charles Darwin


173. What is the substance that cell walls in green plants are made of?



174. To which process of programmed cell death, often recognized by blebbing and DNA fragmentation, does the average human lose around 50 billion cells a day?



175. Which of the following words refers to a baby shark?

A pup


176. A person who specializes in the study of plants is called what?



177. Which scientist was the first person to see bacteria?

Anton van Leeuwenhoek


178. Which of the following terms refers to a DNA change that leads to a new characteristic?

A mutation


179. What type of muscle bends a joint in the body?



180. What is the tubelike elongated mouthpart of a butterfly called?



181. The Dutch scientist Antonie van Leeuwenhoek was the first person to observe which microorganism?



182. What nerve tissue transmits light signals from your eye lens to the brain?



183. Ants have a hard outer shell on their bodies which acts as an exoskeleton and enables them to do what that seems remarkable to humans?

lift 20 times their weight


184. Photosynthesis mostly occurs in which part of plants?



185. Which doctor or team of doctors is credited with pioneering the scientific study of human sexuality?

Masters And Johnson


186. What type of skeleton do humans and most vertebrates have?



187. Mycology is the branch of biology that studies what?



188. What do conifers use to hold seeds?

Pine Cones


189. Born in Sweden, he is known as the “father of taxonomy”. Who is he?

Carolus Linnaeus


190. Which of the following terms refers to animals that eat both animals and plants?



191. What do we call the teeth we grind our food with?



192. Which pair of compounds can be classified as inorganic?

water and salts


193. What is a deciduous plant?

A plant that loses all leaves each year


194. What caused the Irish potato famine of the 1840s?



195. What can children with the rare genetic disease phenylketonuria not eat?

Foods high in protein


196. Which of the following big cats is the fastest animal on land?



197. What connects flower buds to the stem?



198. Which organism does not require oxygen for growth?



199. We can find wild bonobos, chimpanzees, and gorillas on which continent?


200. What is made by white blood cells to help fight off infection?


201. What is the substance cells use as an immediate source of energy for themselves?

adenosine triphosphate


202. Unlike most species of fish, which body part does not exist in sharks?



203. What does the substance melanin control?

Color Of The Skin


204. What is the leaf of a fern called?



205. What is the name of the pigment-containing organelles in autotrophs that collect light energy?



206. What is the smallest unit that can carry out life functions?



207. What is the name of the largest shark?

Whale Shark


208. How do enzymes catalyze reactions?

They change the activation energy


209. Which of the following vitamins is needed for the process of blood clotting?

Vitamin K


210. What is the largest known spider in the world?

Goliath Bird-Eating Spider


211. All carbohydrates contain carbon, hydrogen, and oxygen. All proteins contain carbon, hydrogen, oxygen, and what other element?



212. The most severe competition for space, light, and food occurs in?

Closely related species growing in the same niche or area


213. What are the tiny air sacs in the lungs called?



214. What is the life process used by cells to produce energy (in the form of adenosine triphosphate, or ATP) for cellular activities called?

Cellular respiration


215. What is an ecosystem comprised of?

A biotic community and non-living elements


216. How many stages are in a butterfly’s life cycle?



217. What is the scientific name for the forepaw of a cat?



218. Which four letters in the English alphabet are used to denote the genetic code?



219. What light-sensitive cells in the eye detect colors?



220. ATP stands for what?

Adenosine triphosphate


221. What is the basic unit of classification in biology?



222. What kind of plant stem is soft and green?



223. The second type of programmed cell death literally translates as ‘self-devouring. What is this process, the discovery of the mechanism of which won the Nobel Prize for Medicine in 2016?



224. What is the organic compound that provides energy in living cells?



225. What part of the brain is responsible for vision?



226. What is the name of the much-beloved fruit fly?

Drosophila melanogaster


227. Which of the following animals belongs to the cetacean family, which also includes dolphins?



228. What do you count on a tree to tell how old it is?



229. All vertebrates have hearts that are located in the front part of their body, and are always surrounded by a protective sac with what name?



230. The human brain can generate enough electricity to?

Power a lightbulb


231. What part of the brain controls hunger?



232. Amoebas engulf their food by sticking out finger-like projections called pseudopodia. What is this process called?



233. Benthos is the collective name of plants and animals that live on the bottom of?

A Lake


234. With what process do living creatures make more of themselves?



235. In a human, what area of the body is sphenoid bone closest to?

the side of the head


236. What is considered to be the largest living structure existing on Earth?

The Great Barrier Reef, Australia


237. What is on your tongue that allows you to taste the differences in different foods?

Taste Buds


238. Neurones carry nerve impulses around the human body. What are the gaps between these neurones called?



239. Which ancient philosopher was the first one to propose the biological classification of animals and plants?



240. Trisomy-21 is popularly known as what?

Down Syndrome


241. What’s the cure for Down syndrome?

There is no cure for Down syndrome


242. Most of the enzymes in the body are made of what?



243. What is an urolith?

A Bladder Stone


244. Which are the four most abundant elements in living cells?

carbon, oxygen, hydrogen, nitrogen


245. Why can bats fly in dark?

Because they produce ultrasonic waves


246. What is the basic unit of function and structure in living organisms?



247. In what country was the horse first domesticated?



248. What is the definition of pollination?

The transfer of pollen to stigma from anther


249. What is an algal bloom that occurs in saltwater called?

Red Tide

250. What is the name of the inner membrane of an organism that contains a developing fetus and its protective fluid?


251. From where do plants get most of their nutrients?



252. What does an ornithologist study?



253. There are many chemical reactions that occur in the body. What broad term is used to include them all?



254. Which animal is considered the most highly intelligent mammal?



255. Which nutrient group is used to help grow and repair cells?



256. What disorder is caused by having three copies of chromosome 21?

Down syndrome


257. In addition to malaria, Anopheles mosquitoes also spread which of the following diseases?



258. What grows from an acorn?

Oak Tree


259. Charles Darwin, famous for his description of natural selection as a guiding mechanism of evolution, was also an expert on what organisms?



260. During the process of photosynthesis, oxygen is released from what?



261. What does the zygote form once it starts mitosis?



262. The conversion of unsaturated fats into saturated fats by the addition of hydrogen is a by-product of which process?



263. Robert Gallo was one of the pioneers n the identification of which virus?



264. What natural biological defense system protects the body from disease and fights off germs?



265. Why does water provide a relatively stable external environment for aquatic organisms?

Its temperature varies much less than air temperature


266. What is the world’s largest invertebrate?

Giant squid


267. How many bones are in a giraffe’s neck?



268. A concentration of carbon dioxide in the blood stimulates the breathing center in which part of the body?

Medulla Oblongata


269. What three-letter word is the name given to the mating season of deers?



270. What layer of the skin is just below the surface?



271. What is an oily or waxy organic compound called?



272. What P-word describes an animal’s tail with the ability to grip?



273. What is the name of the sugary substance that many insects get from flowers?



274. How many bones does a hand contain?



275. What G-word is the name of the organ in a bird’s body that grinds the food?



276. What are the small bones that make up a backbone called?



277. Who was the first person to realize that plants absorb oxygen at night and carbon dioxide during the day?

Jan Ingenhousz


278. Which name is given to the heart chamber which receives blood?



279. What is a young bear called?



280. Name the five processes involved in holozoic nutrition in the correct order of execution.

ingestion, digestion, absorption, assimilation, egestion

281. Which glands produce white blood cells?

Lymph glands


282. What are plants that grow, reproduce and die all in one season called?



283. Plants may respond to changes in the environment. These responses are referred to as tropism. If a plant bends towards the light, which type of tropism is the plant demonstrating?



284. What’s the medical term for low blood sugar?



285. Where in the body is blood produced?



286. What is a group of cells that work together and form an organ called?



287. Which structure in mollusks contains internal organs below the mantle?

Visceral mass


288. What is the most common cancer in the world, that kills almost 1.5 million deaths a year?

Lung cancer


289. What part of the flower surrounds the inside parts of the flower?



290. What keeps a duck dry even though it spends almost all its time in the water?



291. What is the world’s largest herb?

Banana plant


292. What is the outermost covering of trees and some plants called?



293. What is the ring of bones at the hip called?

Pelvic girdle


294. What arctic sea whale has one long horn on its head?



295. Which groups of words mean the same thing?

autotroph and producer


296. The limbs of a corpse become stiff (Latin rigor) and difficult to move or manipulate is a sign of what?

Rigor mortis


297. What do many types of birds, such as geese, do just before it begins to get colder?



298. ‘Iodized’ salts contain the iodine salts of which metal?



299. Envoid was the first what in the USA?

Birth control pill available


300. What is a hominid?

An Upright-Walking Primate


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