EUEE 🇪🇹Biology – 50 Multiple Choice Questions

1. Which organelle is responsible for cellular respiration? A. Nucleus
B. Mitochondrion
C. Ribosome
D. Golgi apparatus

2. The basic unit of heredity is the:
A. Chromosome
B. DNA
C. Gene
D. Protein

3. Which process is involved in the movement of water across a semi-permeable membrane?
A. Active transport
B. Diffusion
C. Osmosis
D. Facilitated diffusion

4. Which macromolecule is the main source of energy for cells?
A. Lipid
B. Protein
C. Carbohydrate
D. Nucleic acid

5. What structure controls the activities of the cell?
A. Cytoplasm
B. Cell wall
C. Nucleus
D. Plasma membrane

6. Mitosis results in:
A. Two identical daughter cells
B. Four different cells
C. Two different cells
D. Cells with half the chromosome number

7. Which nitrogenous base is found in RNA but not in DNA?
A. Thymine
B. Adenine
C. Guanine
D. Uracil

8. The largest part of the human brain is the:
A. Medulla
B. Cerebrum
C. Cerebellum
D. Brain stem

9. Which part of the nephron is responsible for filtration?
A. Loop of Henle
B. Bowman's capsule
C. Collecting duct
D. Proximal tubule

10. Which hormone controls the level of glucose in the blood?
A. Insulin
B. Adrenaline
C. Glucagon
D. Thyroxine

11. In photosynthesis, the light-dependent reactions take place in the:
A. Cytoplasm
B. Stroma
C. Thylakoid membrane
D. Mitochondria

12. Which vitamin is essential for blood clotting?
A. Vitamin A
B. Vitamin B12
C. Vitamin C
D. Vitamin K

13. Which part of the flower develops into the fruit?
A. Ovary
B. Anther
C. Stigma
D. Sepal

14. DNA replication occurs during which phase of the cell cycle?
A. G1 phase
B. G2 phase
C. S phase
D. M phase

15. The biome characterized by low rainfall and succulent plants is:
A. Tundra
B. Desert
C. Rainforest
D. Savanna

16. Which blood component helps in clotting?
A. Red blood cells
B. White blood cells
C. Platelets
D. Plasma

17. The human heart has how many chambers?
A. Two
B. Three
C. Four
D. Five

18. The enzyme that breaks down starch is:
A. Pepsin
B. Lipase
C. Amylase
D. Trypsin

19. Which of the following is an abiotic factor?
A. Bacteria
B. Light
C. Fungi
D. Algae

20. The process of forming mRNA from DNA is called:
A. Replication
B. Translation
C. Transcription
D. Mutation

21. Which of the following is NOT a function of the skeleton?
A. Blood cell production
B. Hormone secretion
C. Protection
D. Support

22. Which blood vessels carry blood away from the heart?
A. Veins
B. Capillaries
C. Arteries
D. Venules

23. What is the function of ribosomes?
A. Lipid synthesis
B. Protein synthesis
C. DNA replication
D. Photosynthesis

24. The term diploid refers to:
A. One set of chromosomes
B. Double-stranded DNA
C. Two sets of chromosomes
D. Duplicated genes

25. The function of the pancreas is to:
A. Produce bile
B. Filter blood
C. Regulate blood sugar
D. Store glycogen

26. Which part of the respiratory system is the site of gas exchange?
A. Bronchi
B. Trachea
C. Alveoli
D. Larynx

27. A food chain always starts with:
A. Herbivore
B. Carnivore
C. Decomposer
D. Producer

28. Which of the following is NOT found in prokaryotic cells?
A. DNA
B. Plasma membrane
C. Nucleus
D. Ribosomes

29. The term “allele” refers to:
A. A chromosome segment
B. A type of gene
C. A version of a gene
D. A mutation

30. The main function of white blood cells is:
A. Transport oxygen
B. Defend the body
C. Carry carbon dioxide
D. Clot blood

31. Which organ produces bile?
A. Stomach
B. Liver
C. Pancreas
D. Gall bladder

32. Evolution is best defined as:
A. A change in behavior
B. A change in gene frequency
C. Mutation of organisms
D. Reproduction of species

33. Which phase of mitosis involves the separation of chromatids?
A. Prophase
B. Metaphase
C. Anaphase
D. Telophase

34. The organ that filters blood in humans is the:
A. Liver
B. Kidney
C. Heart
D. Spleen

35. Which gas is used during photosynthesis?
A. Oxygen
B. Carbon dioxide
C. Nitrogen
D. Hydrogen

36. In ecology, a niche refers to:
A. A place to live
B. A predator
C. An organism’s role in the environment
D. A feeding level