Biology – General Science MCQs for GK paper in competitive exams. Important questions from previous year exam papers for free online practice.
Biology GK MCQs
Question 1: Which of the following is commonly known as a blood thinner?
A) Coagulation inhibitor
B) Antibiotic
C) Immunosuppressant
D) Anticoagulant
Question 2: Bile is stored in a sac called __________.
A) Gallbladder
B) Urinary bladder
C) Pancreas
D) Liver
Question 3: What is the pH of human blood?
A) 7.4
B) 10
C) 6.5
D) 5.8
Question 4: Which of the following plant kingdom groups is known as algae?
A) Bryophyta
B) Thallophyta
C) Angiosperm
D) Pteridophyta
Question 5: Deficiency of which vitamin causes swollen neck glands?
A) Vitamin C
B) Iodine
C) Calcium
D) Vitamin D
Question 6: Which of the following belongs to the Platyhelminthes classification under the kingdom Animalia?
A) Tapeworm
B) Leech
C) Wuchereria
D) Sycon
Question 7: In the cytoplasm, ribosomes, mitochondria, and Golgi apparatus are examples of __________.
A) Organs
B) Cells
C) Organelles
D) Tissues
Question 8: What is the normal body temperature of humans?
A) 98.6°C
B) 98.6°F
C) 37°F
D) 40°C
Question 9: In which part of the plant does the process of respiration occur?
A) Roots
B) Stem
C) Leaves
D) Flowers
Question 10: How many major systems are there in the human body?
A) 7
B) 10
C) 12
D) 5
Question 11: What is the full form of DNA?
A) Deoxyribonucleic Acid
B) Deoxyribonucleotide Acid
C) Deoxyribonuclear Acid
D) Deoxynucleic Acid
Question 12: By which process do herbivorous plants prepare food?
A) Respiration
B) Photosynthesis
C) Maturation
D) Regeneration
Question 13: Which is the largest gland in the human body?
A) Pancreas
B) Liver
C) Pituitary Gland
D) Thyroid
Question 14: What is an enzyme?
A) A type of vitamin
B) A type of acid
C) A type of protein
D) A type of mineral
Question 15: What is the function of papillae?
A) Digesting food
B) Regulating body temperature
C) Detoxifying the body
D) Solidifying blood
Question 16: Which cell has a cell membrane?
A) Animal cell
B) Plant cell
C) Bacterial cell
D) All cells
Question 17: Which organ is not part of the central nervous system?
A) Brain
B) Spinal cord
C) Nerve
D) Brain and spinal cord
Question 18: Where is energy produced in a cell?
A) Nucleus
B) Mitochondria
C) Chloroplast
D) Ribosome
Question 19: Where is cartilage found?
A) In bones
B) In the skin
C) In the blood
D) In the nails
Question 20: Which enzyme aids in chemical digestion?
A) Pancreatic lipase
B) Lactase
C) Amylase
D) All
Question 21: Which gas is primarily used in the process of photosynthesis?
A) Oxygen
B) Nitrogen
C) Carbon Dioxide
D) Hydrogen
Question 22: Where is a virus found?
A) Microorganisms
B) Plants
C) Animals
D) Bacteria
Question 23: In which organ does the first digestion of food occur?
A) Stomach
B) Mouth
C) Intestine
D) Esophagus
Question 24: What is the study of microorganisms called?
A) Biology
B) Microbiology
C) Physiology
D) Ecology
Question 25: Which organ purifies the blood?
A) Liver
B) Heart
C) Kidneys
D) Lungs
Question 26: Which part of the papillary helps in digestion?
A) Gastric juice
B) Hydrochloric acid
C) Pepsin
D) All of the above
Question 27: What is not present in living cells?
A) Mitochondria
B) Chloroplast
C) Lysosomes
D) Volcans
Question 28: What condition arises due to a lack of oxygen?
A) Hypoxia
B) Hyperthermia
C) Hypoglycemia
D) Hypothermia
Question 29: What is the main organ for food transportation in plants?
A) Roots
B) Leaves
C) Stem
D) Flowers
Question 30: How many major types of cells are there in human blood?
A) 2
B) 3
C) 4
D) 5
Question 31: What controls cognitive functions?
A) Heart
B) Brain
C) Kidneys
D) Liver
Question 32: What is the function of genes?
A) Digestion of food
B) Production of energy
C) Storage of genetic information
D) Formation of blood
Question 33: What is the function of mitochondria?
A) Production of energy
B) Protein synthesis
C) Cell division
D) Cell structure
Question 34: What type of organism are bacteria?
A) Unicellular
B) Multicellular
C) Viruses
D) Fungi
Question 35: During which stage of the nutrition process is the most energy obtained?
A) Digestion of carbohydrates
B) Digestion of proteins
C) Digestion of fats
D) All equally
Question 36: Which gland plays a major role in body growth?
A) Thyroid
B) Pituitary
C) Pancreas
D) Liver
Question 37: Deficiency of which vitamin causes rickets?
A) Vitamin A
B) Vitamin B
C) Vitamin D
D) Vitamin C
Question 38: What type of antibodies are found in blood group A?
A) B antibodies
B) A antibodies
C) AB antibodies
D) O antibodies
Question 39: What studies the ecosystem?
A) Zoology
B) Botany
C) Ecology
D) Microbiology
Question 40: What is a neuron?
A) Blood cell
B) Nerve cell
C) Digestive cell
D) Liver cell
Question 41: Which organ produces hormones?
A) Heart
B) Liver
C) Thyroid
D) Kidneys
Question 42: Which organ plays a major role in the process of respiration?
A) Heart
B) Lungs
C) Liver
D) Kidneys
Question 43: In the digestive system, which organ produces digestive enzymes?
A) Liver
B) Pancreas
C) Stomach
D) Intestine
Question 44: Which organ in plant cells assists in photosynthesis?
A) Mitochondria
B) Chloroplast
C) Ribosome
D) Nucleus
Question 45: What is the largest organ in the human body?
A) Heart
B) Liver
C) Skin
D) Kidneys
Question 46: A deficiency of Vitamin C leads to which disease?
A) Rickets
B) Scurvy
C) Pellagra
D) Burkitt’s
Question 47: What is the largest cell in the human body?
A) Human Egg
B) Red Blood Cell
C) Liver Cell
D) Nerve Cell
Question 48: What is considered the best sensory organ?
A) Eye
B) Ear
C) Skin
D) Nose
Question 49: Which nutrient is most essential for nutrition?
A) Carbohydrates
B) Protein
C) Fats
D) Vitamins
Question 50: What is the name of the plant hormone that regulates growth?
A) Ethylene
B) Auxin
C) Cytokinin
D) Gibberellin
Question 51: Which organ regulates blood pressure?
A) Heart
B) Kidneys
C) Liver
D) Lungs
Question 52: What is the study of the remains of organisms called?
A) Paleontology
B) Genetics
C) Ecology
D) Microbiology
Question 53: What part is included in the structure of a virus?
A) Nucleus
B) Protein coat
C) Mitochondria
D) Chloroplast
Question 54: Which part of the plant absorbs water?
A) Leaves
B) Stem
C) Roots
D) Flowers
Question 55: What does Maltase digest?
A) Proteins
B) Fats
C) Carbohydrates
D) Vitamins
Question 56: In which part of the body does fat digestion occur?
A) Stomach
B) Intestine
C) Liver
D) Kidneys
Question 57: Which organ plays a major role in drug absorption?
A) Mouth
B) Stomach
C) Intestine
D) Liver
Question 58: Where are RBCs produced in the body?
A) Liver
B) Kidneys
C) Bone marrow
D) Liver
Question 59: What is the most important organ in the process of respiration?
A) Heart
B) Lungs
C) Liver
D) Kidneys
Question 59: Who proposed the theory of natural selection?
A) Louis Pasteur
B) Charles Darwin
C) Gregor Mendel
D) Robert Hooke
Question 60: Which organ is responsible for the production of red blood cells?
A) Bone marrow
B) Heart
C) Brain
D) Lungs