Which is the main organ of the circulatory system?
(A) Lung
(B) Kidney
(C) Heart
(D) Liver
Answer: (C)

Which of the following blood cells have a nucleus?
(A) Red blood cells
(B) White blood cells
(C) Platelets
(D) All of the above
Answer: (B)

Which part of the flower develops into a fruit?
(A) Ovary
(B) Ovule
(C) Anther
(D) Stigma
Answer: (A)

The study of heredity is known as –
(A) Anatomy
(B) Physiology
(C) Genetics
(D) Cytology
Answer: (C)

Which of the following is the excretory organ in humans?
(A) Lungs
(B) Liver
(C) Kidney
(D) Heart
Answer: (C)

The number of cervical vertebrae in the human spine is –
(A) 7
(B) 8
(C) 9
(D) 10
Answer: (A)

Which of the following structures is not found in animal cells?
(A) Nucleus
(B) Mitochondria
(C) Cell wall
(D) Ribosome
Answer: (C)

What is the main function of xylem in plants?
(A) Transport of food
(B) Transport of water
(C) Photosynthesis
(D) Reproduction
Answer: (B)

Which of the following is not a function of the skeletal system?
(A) Protection
(B) Blood production
(C) Digestion
(D) Support
Answer: (C)

The central nervous system consists of –
(A) Brain and spinal cord
(B) Brain and heart
(C) Heart and lungs
(D) Nerves and muscles
Answer: (A)

The white part of the eye is called –
(A) Iris
(B) Retina
(C) Cornea
(D) Sclera
Answer: (D)

Which vitamin helps prevent beriberi?
(A) Vitamin A
(B) Vitamin B1
(C) Vitamin C
(D) Vitamin D
Answer: (B)

Which hormone is responsible for the development of male characteristics?
(A) Estrogen
(B) Progesterone
(C) Testosterone
(D) Oxytocin
Answer: (C)

Which plant hormone promotes ripening of fruits?
(A) Auxin
(B) Cytokinin
(C) Gibberellin
(D) Ethylene
Answer: (D)

Which part of the brain helps in maintaining balance and posture?
(A) Cerebellum
(B) Cerebrum
(C) Medulla
(D) Hypothalamus
Answer: (A)

Which process helps maintain internal stability in an organism?
(A) Osmosis
(B) Photosynthesis
(C) Homeostasis
(D) Respiration
Answer: (C)

What is the role of hemoglobin?
(A) Digest food
(B) Transport oxygen
(C) Produce hormones
(D) Fight infection
Answer: (B)

Which one of the following is a plant hormone?
(A) Cholesterol
(B) Adrenaline
(C) Auxin
(D) Insulin
Answer: (C)

Which part of the cell contains genetic material?
(A) Cytoplasm
(B) Ribosome
(C) Nucleus
(D) Mitochondria
Answer: (C)

Which process converts glucose into energy?
(A) Photosynthesis
(B) Transpiration
(C) Respiration
(D) Germination
Answer: (C)

Which of the following is not a component of DNA?
(A) Adenine
(B) Thymine
(C) Uracil
(D) Cytosine
Answer: (C)

The blood component involved in immunity is –
(A) RBC
(B) WBC
(C) Platelet
(D) Plasma
Answer: (B)

Which enzyme breaks down proteins in the stomach?
(A) Pepsin
(B) Amylase
(C) Lipase
(D) Maltase
Answer: (A)

The smallest blood vessels in the body are –
(A) Veins
(B) Arteries
(C) Capillaries
(D) Venules
Answer: (C)

Which of the following has chloroplasts?
(A) Animal cells
(B) Plant cells
(C) Fungi
(D) Bacteria
Answer: (B)

Which part of the human body regulates water balance?
(A) Lungs
(B) Liver
(C) Kidneys
(D) Heart
Answer: (C)

The process of cell division that forms gametes is –
(A) Mitosis
(B) Binary fission
(C) Meiosis
(D) Budding
Answer: (C)

The powerhouse of the cell is –
(A) Golgi apparatus
(B) Lysosome
(C) Nucleus
(D) Mitochondria
Answer: (D)

Which cell organelle detoxifies poisons in liver cells?
(A) Rough ER
(B) Smooth ER
(C) Golgi body
(D) Ribosome
Answer: (B)

Which of the following produces antibodies?
(A) Red blood cells
(B) Platelets
(C) Plasma cells
(D) Neurons
Answer: (C)

The pigment found in red blood cells is –
(A) Melanin
(B) Keratin
(C) Hemoglobin
(D) Myosin
Answer: (C)

Which part of the body is affected by pneumonia?
(A) Kidney
(B) Liver
(C) Lungs
(D) Heart
Answer: (C)

Which tissue connects muscle to bone?
(A) Ligament
(B) Tendon
(C) Cartilage
(D) Epithelium
Answer: (B)

Which of the following is a hereditary disease?
(A) AIDS
(B) Hemophilia
(C) Typhoid
(D) Cholera
Answer: (B)

Which vitamin helps in iron absorption?
(A) Vitamin A
(B) Vitamin C
(C) Vitamin D
(D) Vitamin E
Answer: (B)

Which one is not a function of the liver?
(A) Urea formation
(B) Production of bile
(C) Storage of vitamins
(D) Production of insulin
Answer: (D)

What is the full form of ATP?
(A) Adenosine tri phosphate
(B) Amino tri phosphate
(C) Adenine tetra phosphate
(D) Adenosine tri pyruvate
Answer: (A)

Which gland is also known as the ‘master gland’?
(A) Thyroid
(B) Pancreas
(C) Pituitary
(D) Adrenal
Answer: (C)

Which of the following is not an excretory product?
(A) Urea
(B) CO₂
(C) Sweat
(D) Oxygen
Answer: (D)

The disease associated with insulin deficiency is –
(A) Hypertension
(B) Diabetes
(C) Obesity
(D) Anaemia
Answer: (B)

Which of the following is NOT a viral disease?
(A) Measles
(B) AIDS
(C) Tuberculosis
(D) Influenza
Answer: (C)

Which part of the brain regulates voluntary movements?
(A) Cerebellum
(B) Cerebrum
(C) Medulla
(D) Pons
Answer: (B)

Which of the following is a biodegradable pollutant?
(A) Plastics
(B) Pesticides
(C) Sewage
(D) DDT
Answer: (C)

The cells responsible for carrying oxygen in the blood are –
(A) Platelets
(B) Red blood cells
(C) White blood cells
(D) Plasma cells
Answer: (B)

A mature ovary in a flower becomes –
(A) Seed
(B) Fruit
(C) Embryo
(D) Bud
Answer: (B)

Which part of the human brain is involved in hormone production?
(A) Cerebellum
(B) Hypothalamus
(C) Medulla
(D) Pons
Answer: (B)

Which blood cells are involved in blood clotting?
(A) RBC
(B) WBC
(C) Platelets
(D) Lymphocytes
Answer: (C)

Which of the following is not a fat-soluble vitamin?
(A) Vitamin A
(B) Vitamin B
(C) Vitamin D
(D) Vitamin E
Answer: (B)

Which element is essential for the formation of thyroxine hormone?
(A) Calcium
(B) Iodine
(C) Iron
(D) Zinc
Answer: (B)

The uppermost layer of skin is called –
(A) Dermis
(B) Hypodermis
(C) Epidermis
(D) Mesoderm
Answer: (C)