Biology MCQs – Set 4: High-Level Questions for UPSC/PSC/SSC CGL Prep

Which of the following helps in clotting of blood?
(A) Red blood cells
(B) White blood cells
(C) Platelets
(D) Plasma
Answer: (C)
Which plant hormone is responsible for cell elongation?
(A) Cytokinin
(B) Auxin
(C) Ethylene
(D) Gibberellin
Answer: (B)
Which part of the brain controls emotions and motivation?
(A) Hypothalamus
(B) Medulla
(C) Cerebrum
(D) Cerebellum
Answer: (A)
Which of these is a vestigial organ in humans?
(A) Kidney
(B) Liver
(C) Appendix
(D) Heart
Answer: (C)
Which blood component helps in fighting infections?
(A) Platelets
(B) Plasma
(C) RBCs
(D) WBCs
Answer: (D)
Which of these is a viral disease?
(A) Cholera
(B) Typhoid
(C) Dengue
(D) Tuberculosis
Answer: (C)
Which vitamin is essential for blood clotting?
(A) Vitamin A
(B) Vitamin B12
(C) Vitamin C
(D) Vitamin K
Answer: (D)
What is the role of phloem in plants?
(A) Transport of water
(B) Photosynthesis
(C) Transport of food
(D) Support
Answer: (C)
Which of the following is not a connective tissue?
(A) Blood
(B) Bone
(C) Cartilage
(D) Muscle
Answer: (D)
Who is considered the father of genetics?
(A) Darwin
(B) Mendel
(C) Watson
(D) Lamarck
Answer: (B)
Which part of the nephron filters blood?
(A) Loop of Henle
(B) Glomerulus
(C) Collecting duct
(D) Tubule
Answer: (B)
Which vitamin is synthesized in the intestine?
(A) Vitamin A
(B) Vitamin C
(C) Vitamin K
(D) Vitamin D
Answer: (C)
The causative organism of tuberculosis is –
(A) Plasmodium
(B) Mycobacterium tuberculosis
(C) Vibrio cholerae
(D) Salmonella typhi
Answer: (B)
Which of the following contains digestive enzymes?
(A) Mitochondria
(B) Golgi bodies
(C) Ribosome
(D) Lysosome
Answer: (D)
Which is not a function of the liver?
(A) Producing bile
(B) Storing glucose
(C) Producing insulin
(D) Detoxifying poisons
Answer: (C)
Blood pressure is measured using –
(A) Thermometer
(B) Sphygmomanometer
(C) Barometer
(D) Hygrometer
Answer: (B)
Which gas is essential for photosynthesis?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Methane
Answer: (C)
The hormone responsible for milk production in mammals is –
(A) Estrogen
(B) Progesterone
(C) Prolactin
(D) Oxytocin
Answer: (C)
Which element is found at the center of the chlorophyll molecule?
(A) Magnesium
(B) Iron
(C) Copper
(D) Zinc
Answer: (A)
Which of these diseases is caused by a fungus?
(A) Ringworm
(B) Polio
(C) Measles
(D) Typhoid
Answer: (A)
Which part of the brain regulates body temperature?
(A) Cerebrum
(B) Hypothalamus
(C) Medulla
(D) Pons
Answer: (B)
Which vitamin helps in the absorption of iron?
(A) Vitamin A
(B) Vitamin C
(C) Vitamin D
(D) Vitamin E
Answer: (B)
Which of the following is the largest gland in the human body?
(A) Pituitary
(B) Liver
(C) Pancreas
(D) Thyroid
Answer: (B)
Which type of joint is found in the elbow?
(A) Ball and socket
(B) Hinge
(C) Pivot
(D) Gliding
Answer: (B)
The malaria parasite is transmitted by –
(A) Housefly
(B) Female Anopheles mosquito
(C) Sandfly
(D) Cockroach
Answer: (B)
Which organ secretes bile juice?
(A) Pancreas
(B) Stomach
(C) Liver
(D) Kidney
Answer: (C)
Which is a communicable disease?
(A) Diabetes
(B) Cancer
(C) Influenza
(D) Asthma
Answer: (C)
Which blood group is a universal donor?
(A) A
(B) B
(C) AB
(D) O
Answer: (D)
Which hormone regulates metabolism?
(A) Insulin
(B) Adrenaline
(C) Thyroxine
(D) Estrogen
Answer: (C)
Which disease is known as the silent killer?
(A) Hypertension
(B) Tuberculosis
(C) Cancer
(D) AIDS
Answer: (A)
Which part of the plant conducts water?
(A) Phloem
(B) Xylem
(C) Cambium
(D) Cortex
Answer: (B)
Which part of the cell contains chromosomes?
(A) Cytoplasm
(B) Mitochondria
(C) Nucleus
(D) Ribosome
Answer: (C)
Which vitamin is essential for healthy skin?
(A) Vitamin A
(B) Vitamin B12
(C) Vitamin C
(D) Vitamin D
Answer: (A)
Which is the strongest muscle in the human body based on weight?
(A) Biceps
(B) Jaw muscle (masseter)
(C) Heart
(D) Gluteus maximus
Answer: (B)
Which is the main excretory product in humans?
(A) Ammonia
(B) Urea
(C) Uric acid
(D) Creatinine
Answer: (B)
Which cell organelle is called the ‘suicide bag’?
(A) Ribosome
(B) Lysosome
(C) Golgi apparatus
(D) Nucleus
Answer: (B)
Which among the following is not a sense organ?
(A) Eye
(B) Ear
(C) Skin
(D) Liver
Answer: (D)
In which organ of the human body are nephrons found?
(A) Liver
(B) Lung
(C) Kidney
(D) Brain
Answer: (C)
Which of the following is a natural insecticide?
(A) DDT
(B) Pyrethrum
(C) Malathion
(D) Endosulfan
Answer: (B)
Which part of the plant is responsible for transpiration?
(A) Stem
(B) Leaf
(C) Root
(D) Flower
Answer: (B)
Which of these carries oxygenated blood?
(A) Pulmonary artery
(B) Vena cava
(C) Pulmonary vein
(D) Right atrium
Answer: (C)
Which enzyme breaks down proteins in the stomach?
(A) Amylase
(B) Trypsin
(C) Pepsin
(D) Lipase
Answer: (C)
Which cell structure is responsible for energy production?
(A) Ribosome
(B) Mitochondria
(C) Endoplasmic reticulum
(D) Nucleus
Answer: (B)
Which cell organelle is involved in detoxification?
(A) Rough ER
(B) Smooth ER
(C) Golgi body
(D) Lysosome
Answer: (B)
Which of the following is a genetic disease?
(A) Malaria
(B) Asthma
(C) Hemophilia
(D) Typhoid
Answer: (C)
Which part of the human brain is responsible for intelligence?
(A) Cerebrum
(B) Cerebellum
(C) Medulla
(D) Pons
Answer: (A)
Which gas is exhaled during respiration?
(A) Oxygen
(B) Nitrogen
(C) Carbon dioxide
(D) Hydrogen
Answer: (C)
Which of the following is not found in animal cells?
(A) Nucleus
(B) Mitochondria
(C) Chloroplast
(D) Cytoplasm
Answer: (C)
Which part of the brain controls voluntary actions?
(A) Cerebrum
(B) Cerebellum
(C) Medulla
(D) Hypothalamus
Answer: (A)
Which type of blood cells help in immunity?
(A) RBC
(B) Platelets
(C) WBC
(D) Plasma
Answer: (C)

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