50 Biology MCQs for Competetive Exams (continued)
Below, you’ll find the next batch of biology MCQs covering fundamental topics in biology such as cell biology, genetics, physiology, and ecology. Each question is crafted to not only test your knowledge but also to help you learn more about biology. Try and solve the following biology MCQs to test your knowledge of biology.
- Which disease is caused by a deficiency of vitamin C?
- a) Rickets
- b) Scurvy
- c) Beriberi
- d) Pellagra
- Which of the following is a function of the lymphatic system?
- a) Producing hormones
- b) Transporting oxygen
- c) Maintaining fluid balance
- d) Breaking down nutrients
- Which hormone is produced by the adrenal glands and helps the body respond to stress?
- a) Insulin
- b) Estrogen
- c) Cortisol
- d) Thyroxine
- Which of the following is a genetic disorder caused by an extra chromosome 21?
- a) Turner syndrome
- b) Klinefelter syndrome
- c) Down syndrome
- d) Cystic fibrosis
- Which process describes the movement of molecules from an area of high concentration to an area of low concentration?
- a) Active transport
- b) Osmosis
- c) Diffusion
- d) Facilitated diffusion
- What is the primary function of the kidneys?
- a) Producing red blood cells
- b) Filtering blood and producing urine
- c) Digesting proteins
- d) Regulating body temperature
- Which part of the cell is responsible for producing ribosomes?
- a) Golgi apparatus
- b) Nucleolus
- c) Mitochondrion
- d) Lysosome
- What type of bond holds the two strands of DNA together?
- a) Ionic bonds
- b) Covalent bonds
- c) Hydrogen bonds
- d) Metallic bonds
- Which of the following is an example of a decomposer?
- a) Plant
- b) Fungus
- c) Herbivore
- d) Omnivore
- What is the function of antibodies in the immune system?
- a) Destroying pathogens
- b) Clotting blood
- c) Transporting oxygen
- d) Producing hormones
- Which part of the brain regulates homeostasis, including temperature and hunger?
- a) Thalamus
- b) Hypothalamus
- c) Cerebellum
- d) Pons
- What is the main purpose of cellular respiration?
- a) To produce glucose
- b) To convert solar energy into chemical energy
- c) To release energy from glucose
- d) To create new cells
- What is the name of the process by which plants convert light energy into chemical energy?
- a) Photosynthesis
- b) Respiration
- c) Fermentation
- d) Transpiration
- Which of the following is a polysaccharide that stores energy in plants?
- a) Glucose
- b) Glycogen
- c) Starch
- d) Cellulose
- Which structure in the human body is primarily responsible for gas exchange?
- a) Heart
- b) Liver
- c) Kidney
- d) Alveoli
100 General Science MCQs For Competetive Test
A molecular biologist and aspiring bioinformatician with a passion for genomics, rare diseases, and precision medicine. With an MPhil in Molecular Biology and experience in genetics and genomics, he has contributed to clinical research projects on rare genetic disorders. He’s passionate about making genomic data meaningful — and ultimately helpful — for patients and clinicians alike.