BIOLOGY 15 MCQ, PART 3

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BIOLOGY PART 3

15 Biology multiple-choice questions (MCQs)along with their Answers 


21. **Which disease is caused by the deficiency of vitamin C?**

    - A) Scurvy

    - B) Rickets

    - C) Beriberi

    - D) Pellagra

    - **Answer: A) Scurvy**



22. **Which process allows plants to convert sunlight into energy?**

    - A) Photosynthesis

    - B) Respiration

    - C) Fermentation

    - D) Transpiration

    - **Answer: A) Photosynthesis**


23. **Which blood vessel carries oxygenated blood from the lungs to the heart?**

    - A) Vein

    - B) Artery

    - C) Capillary

    - D) Pulmonary vein

    - **Answer: D) Pulmonary vein**


24. **Which disease is caused by the Plasmodium parasite transmitted by mosquitoes?**

    - A) Malaria

    - B) Dengue

    - C) Chikungunya

    - D) Zika

    - **Answer: A) Malaria**


25**What is the function of the mitochondria in a cell?**

    - A) Storage of genetic material

    - B) Synthesis of proteins

    - C) Cellular respiration

    - D) Lipid synthesis

    - **Answer: C) Cellular respiration**



26. **Which part of the human brain controls balance and coordination?**

 - A) Cerebrum

 - B) Cerebellum

 - C) Medulla oblongata

 - D) Hypothalamus

 - **Answer: B) Cerebellum**


27. **What is the function of white blood cells (leukocytes)?**

 - A) Transport oxygen

 - B) Fight infections

 - C) Produce insulin

 - D) Regulate blood pressure

 - **Answer: B) Fight infections**


28. **Which gas is released during photosynthesis?**

 - A) Oxygen

 - B) Carbon dioxide

 - C) Nitrogen

 - D) Hydrogen

 - **Answer: A) Oxygen**


29 **Which gland produces insulin in the human body?**

 - A) Thyroid gland

 - B) Adrenal gland

 - C) Pancreas

 - D) Pituitary gland

 - **Answer: C) Pancreas**


30 **What is the process by which plants lose water vapor through tiny pores in their leaves?**

 - A) Transpiration

 - B) Respiration

 - C) Photosynthesis

 - D) Osmosis

 - **Answer: A) Transpiration**


31. **Which blood type is considered the universal donor?**

 - A) A

 - B) B

 - C) AB

 - D) O

 - **Answer: D) O**


32. **Which organelle is responsible for detoxifying harmful substances in liver cells?**

 - A) Nucleus

 - B) Golgi apparatus

 - C) Lysosome

 - D) Smooth endoplasmic reticulum

 - **Answer: D) Smooth endoplasmic reticulum**


33. **What is the primary function of red blood cells (erythrocytes)?**

 - A) Carrying oxygen

 - B) Fighting infections

 - C) Producing antibodies

 - D) Regulating blood sugar

 - **Answer: A) Carrying oxygen**


34. **Which gas is responsible for the acidic nature of rainwater?**

 - A) Oxygen

 - B) Nitrogen

 - C) Carbon dioxide

 - D) Sulfur dioxide

 - **Answer: D) Sulfur dioxide**


35. **Which part of a flower contains the pollen grains?**

 - A) Petal

 - B) Stamen

 - C) Sepal

 - D) Pistil

 - **Answer: B) Stamen**


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