Here are the best biology trivia questions with answers to test your knowledge of how much you know about biology. Trivia Questions are the best fun way to test your knowledge in the knowledge-growing process.
Biology Trivia Questions With Answers
1. Amphibians generally have three chambers in their hearts. What type of chambers are they? Answer: Two atria, one ventricle
2. Bacteria of the genus Rhizobium form nodules on the roots of leguminous plants. They are important in the food cycle because: They fix nitrogen into nitrates
3. CH3CH2COOH is an example of which of these molecules? Answer: An alkanoic (fatty) acid
4. For marine life water is not just the medium of transport but it is the source of oxygen for the organisms’ respiratory needs. Water enters a fish through the buccal cavity and the increased pressure causes the water to pass through the gills. What is the name given to the mechanism whereby water flows across the gills in the opposite direction to the blood flow within the gills? Answer: Countercurrent
5. For some animals, one heart is not enough. What class of animals usually has three hearts? Answer: Cephalopoda, such as an octopus
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6. How do enzymes catalyse reactions? Answer: They change the activation energy.
7. How many bones does a hand contain? Answer: 27
8. Humans maintain their body temperature using a number of homeostatic mechanisms. Sweating is one example whereby a mixture of water and some dissolved substances is released from the sweat glands onto the surface of the skin. What process is responsible for “drying” the sweat and thus cooling the skin? Answer: Evaporation
9. In general, what does the nucleus of a cell contain? Answer: The cell’s genetic material
10. Iron is important for the production of a protein called _____. Answer: Haemoglobin
11. Jellyfish have a body plan that is described by biologists by what name? Answer: coelenterate
12. Lobsters, crabs, and shrimp all belong to what group of animals? Answer: Arthropods
13. Mammals and birds have double circulatory systems, with four-chambered hearts that keep the pulmonary and systemic subsystems separated. What is the name for each of the chambers through which blood enters the heart? Answer: Atrium
14. Medically speaking, what is the meaning of the abbreviation SOB? Answer: shortness of breath
15. Name the protozoan that causes malaria. Answer: Plasmodium
16. Neurones carry nerve impulses around the human body. What are the gaps between these neurones called? Answer: Synapses
17. Pasteurization is named after which famous French chemist and microbiologist? Answer: Louis Pasteur
18. Photosynthesis = Carbon Dioxide + Water = _____ + Oxygen Fill in the blank. Answer: Glucose
19. Plants may respond to changes in the environment. These responses are referred to as a tropism. If a plant bends towards the light, which type of tropism is the plant demonstrating? Answer: Phototropism
20. Rabies is caused by which infectious agent? Answer: virus
21. Sodium Benzoate is not a chemical food preservative. (true or false) Answer: False
22. Suppose I had a cat that had the genotype bb for its fur color and the phenotype of bb has pink fur. If the cat had the allele B, then it would have purple fur but because it doesn’t; it has pink fur. What would the genotype for bb be called? Answer: Homozygous Recessive
23. The blood of an organism consists of many cells and useful products. What is the name given to the part of blood that is mainly water and thus carries dissolved nutrients around the body? Answer: Plasma
24. The conversion of unsaturated fats into saturated fats by addition of hydrogen is a by-product of which process? Answer: Hydrogenation
25. The energy used by most living beings on the earth to feed, move, and reproduce all comes from what original source? Answer: the sun
26. The loss of electrons by a molecule, atom or ion is called: oxidation
27. This life process is a developmental one in which unspecialized cells evolve into specific cells having unique structure and function. This is how cells develop into tissues and organs. Answer: differentiation
28. Tocopherol is the chemical name of which vitamin? Answer: Vitamin E
29. Water is an important molecule in the process of digestion as it is used to break down large polymers, such as proteins and carbohydrates, into small monomers, such as amino acids and monosaccharides. What is the name given to the breakdown of polymers into monomers by water? Answer: Hydrolysis
30. Water is the key to life, without it we simply wouldn’t exist. It has certain properties that make the molecule so essential to biology such as its polarity and composition. What is responsible for water molecules having a higher boiling point than other molecules of a similar molecular weight? Answer: Hydrogen bonding
31. What are enzymes in plant cells made from? Answer: Protein
32. What can children with the rare genetic disease phenylketonuria not eat? Answer: Foods high in protein
33. What does ‘DNA’ stand for? Answer: deoxyribonucleic acid
34. What element is present in all proteins, distinguishing them from non-proteins? Answer: Nitrogen
35. What happens to someone who has cystic fibrosis? Answer: Their body produces thick mucus which blocks the lungs and digestive system.
36. What human organ stores concentrated bile, which is needed to digest lipids (including fats)? Answer: gall bladder
37. What is a poison that stops the final stage of cellular respiration, the electron transport chain? Answer: Cyanide
38. What is amensalism? Answer: A relationship between two species where one species gains no benefit while the other species is harmed.
39. What is an animal that eats only meat called? Answer: a carnivore
40. What is entomology the study of? Answer: Insects
41. What is Pellagra? Answer: A deficiency disease
42. What is the expanded form of DDT? Answer: Dichloro Diphenyl Trichloroethane
43. What is the function of ALL enzymes? Answer: Facilitate bio-chemical reactions
44. What is the hormone in plants called which causes them to bend towards the light? Answer: Auxin
45. What is the life process called in which ingested food is broken down into simple molecules which are then able to be absorbed and used by the body? Answer: digestion
46. What is the name for the structures in a multi-chambered heart which keep the blood from flowing backwards? Answer: Valves
47. What is the name of the inner membrane of an organism that contains a developing fetus and its protective fluid? Answer: amnion
48. What is the name of the life process involved in eliminating metabolic and digestive wastes from the body? Answer: excretion
49. What is the name of the organ that stores bile? Answer: gallbladder
50. What is the scientific name for the forepaw of a cat? Answer: manus
51. What is the scientific name of the fruit fly, an organism much beloved by geneticists everywhere? Answer: Drosophila melanogaster
52. What is the scientific term for a ‘cold-blooded’ animal? Answer: a poikilotherm
53. What is the scientific term for competition between members of the same species? Answer: Intraspecific competition
54. What name is given to the clear layer at the front of the eye? Answer: cornea
55. What on earth does a restriction enzyme do? Answer: cuts DNA at specific sites
56. What protein lowers the activation energy of chemical reactions? Answer: enzyme
57. Where are you more likely to find the largest number of living organisms (including microbes) in one gallon of water? Answer: Arctic Ocean
58. Which are alive- xylem or phloem cells? Answer: phloem
59. Which function is carried out by the Golgi apparatus? Answer: Modification of proteins for secretion
60. Which life process means to increase in size or in total number of cells? Answer: growth
61. Which part of the human eye contains receptors that detect light? Answer: Retina
62. Why does water provide a relatively stable external environment for aquatic organisms? Answer: Its temperature varies much less than air temperature
