- 1. Biology is the scientific study of living organisms and their interactions with each other and their environment. It encompasses a wide range of topics, from the structure and function of molecules within cells to the behavior and ecology of entire populations. Through the study of biology, we gain a better understanding of the diversity of life on Earth, how organisms adapt to their environments, and the interconnectedness of all living things.
Which process is responsible for converting sunlight into chemical energy in plants?
A) Photosynthesis
B) Mitosis
C) Digestion
D) Cellular respiration
- 2. What is the powerhouse of the cell?
A) Mitochondria
B) Chloroplast
C) Endoplasmic reticulum
D) Nucleus
- 3. Which part of the flower produces pollen?
A) Pistil
B) Sepal
C) Stigma
D) Anther
- 4. What is the basic unit of life?
A) Tissue
B) Atom
C) Cell
D) Molecule
- 5. Which scientist proposed the theory of evolution by natural selection?
A) Louis Pasteur
B) Charles Darwin
C) Gregor Mendel
D) Marie Curie
- 6. Where does the process of digestion begin?
A) Large Intestine
B) Mouth
C) Stomach
D) Small Intestine
- 7. Which molecule stores genetic information in cells?
A) Protein
B) Carbohydrate
C) DNA
D) RNA
- 8. What is the process by which plants release excess water vapor through their leaves?
A) Perspiration
B) Transpiration
C) Respiration
D) Evaporation
- 9. What is the body's largest organ?
A) Heart
B) Liver
C) Skin
D) Lungs
- 10. Which part of the brain is responsible for coordination and balance?
A) Cerebrum
B) Hippocampus
C) Brainstem
D) Cerebellum
- 11. Which kingdom do mushrooms belong to?
A) Protista
B) Plantae
C) Fungi
D) Animalia
- 12. During which phase of the cell cycle does DNA replication occur?
A) M phase
B) S phase
C) G1 phase
D) G2 phase
- 13. What is the process of breaking down glucose to release energy called?
A) Cellular respiration
B) Fermentation
C) Photosynthesis
D) Transpiration
- 14. What is the process by which water moves up the stem of a plant?
A) Osmosis
B) Capillary action
C) Photosynthesis
D) Evaporation
- 15. Which process involves the division of a cell into two daughter cells?
A) Meiosis
B) Mitosis
C) Apoptosis
D) Cytokinesis
- 16. What is the process of maintaining a stable internal environment in organisms called?
A) Evolution
B) Homeostasis
C) Adaptation
D) Respiration
- 17. Which process involves the conversion of nitrogen gas into a form plants can use?
A) Photosynthesis
B) Respiration
C) Fermentation
D) Nitrogen fixation
- 18. What is the study of heredity and variation in living organisms called?
A) Physiology
B) Taxonomy
C) Genetics
D) Ecology
- 19. Which organelle is responsible for protein synthesis?
A) Mitochondria
B) Golgi apparatus
C) Ribosome
D) Lysosome
- 20. Which of the following is part of the central nervous system?
A) Brain
B) Kidney
C) Pancreas
D) Esophagus
- 21. What is the function of the lungs in the respiratory system?
A) Producing bile
B) Gas exchange
C) Filtering blood
D) Digestion
- 22. Which of the following is a vestigial organ in humans?
A) Kidneys
B) Lungs
C) Heart
D) Appendix
- 23. Which part of the eye is responsible for detecting light?
A) Iris
B) Lens
C) Retina
D) Cornea
- 24. Which of the following is a type of movement in plants?
A) Circulation
B) Migration
C) Hibernation
D) Tropism
- 25. Which type of cell division results in the formation of gametes?
A) Regeneration
B) Binary fission
C) Mitosis
D) Meiosis
- 26. What is the substance that gives skin and hair its color?
A) Collagen
B) Keratin
C) Melanin
D) Elasitn
- 27. What is the liquid component of blood called?
A) Red blood cells
B) Plasma
C) Platelets
D) White blood cells
- 28. Which of the following is a function of the circulatory system?
A) Produce antibodies
B) Produce insulin
C) Transport nutrients
D) Regulate body temperature
- 29. What is the primary function of the ribcage in the respiratory system?
A) Protect the lungs
B) Exchange gases
C) Produce mucus
D) Generate heat
- 30. Which of the following is a function of the endocrine system?
A) Regulate hormones
B) Protect organs
C) Produce bile
D) Provide structure
- 31. What is the role of enzymes in biological reactions?
A) Produce waste
B) Provide energy
C) Act as catalysts
D) Store nutrients
- 32. Which part of the human ear is responsible for balancing?
A) Eardrum
B) Cochlea
C) Ear canal
D) Semicircular canals
- 33. What system controls the body's responses to external changes?
A) Endocrine system
B) Nervous system
C) Respiratory system
D) Circulatory system
- 34. How many chambers are there in a human heart?
A) 6
B) 2
C) 8
D) 4
- 35. Which gas do plants use for photosynthesis?
A) Nitrogen
B) Hydrogen
C) Oxygen
D) Carbon dioxide
- 36. What type of joints are elbows and knees?
A) Gliding joints
B) Pivot joints
C) Ball and socket joints
D) Hinge joints
- 37. What is the study of fossils called?
A) Paleontology
B) Geology
C) Archaeology
D) Anthropology
- 38. What is the powerhouse of a plant cell called?
A) Vacuole
B) Cell wall
C) Nucleus
D) Chloroplast
- 39. What is the name of the process by which a caterpillar turns into a butterfly?
A) Photosynthesis
B) Fermentation
C) Respiration
D) Metamorphosis
- 40. What is the process by which DNA is copied called?
A) Transcription
B) Mutation
C) Replication
D) Translation
- 41. What does DNA stand for?
A) Ribose nucleic acid
B) Deoxyribonucleic acid
C) Deoxyribose nucleic acid
D) Ribonucleic acid
- 42. The human skeleton is made up of how many bones?
A) 100
B) 150
C) 206
D) 300
- 43. Mendel's laws of inheritance are based on the behavior of?
A) Organs
B) Tissues
C) Genes
D) Cells
- 44. Where does photosynthesis occur in plant cells?
A) Chloroplasts
B) Cytoplasm
C) Mitochondria
D) Nucleus
- 45. Which part of the human brain is responsible for intelligence, reasoning, and memory?
A) Cerebellum
B) Cerebrum
C) Brainstem
D) Hypothalamus
- 46. Which of the following is not a type of cell division in eukaryotic cells?
A) Binary fission
B) Cytokinesis
C) Mitosis
D) Meiosis
- 47. Which part of a plant absorbs water and minerals from the soil?
A) Leaves
B) Stem
C) Roots
D) Flower
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