Biology Olympiad Questions. We covered all the Biology Olympiad Questions in this post for free so that you can practice well for the exam.
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Biology Olympiad Questions Objective for Students
What is responsible for the formation of stones in the human kidney?
(a) Calcium acetate
(b) Calcium oxalate
(c) Sodium acetate
(d) Sodium benzoate
Option b – Calcium oxalate
How many bones are there in the human skeleton? ( Biology Olympiad Questions )
(a) 126 bones
(b) 200 bones
(c) 206 bones
(d) 220 bones
Option c – 206 bones
Inner to the hilum of the kidney, there is a broad funnel-shaped space called
(a) Renal pelvis
(b) Medulla
(c) Cortex
(d) Adrenal gland
Option a – Renal pelvis
What is the structural and functional unit of the kidney? ( Biology Olympiad Questions )
(a) Medulla
(b) Nephridia
(c) Nephron
(d) Hilum
Option c – Nephron
Which of the following is NOT a normal function of the human kidney?
(a) Regulation of water level in the blood
(b) Regulation of sugar level in the blood
(c) Filter out urea
(d) Secretion of several hormones
Option b – Regulation of sugar level in the blood
What is the correct pathway for the elimination of urine? ( Biology Olympiad Questions )
(a) Kidneys, Ureters, Bladder, Urethra
(b) Kidneys, Urethra, Bladder, Ureters
(c) Urethra, Ureters, Bladder, Kidneys
(d) Bladder, Ureters, Kidneys, Urethra
Option a – Kidneys, Ureters, Bladder, Urethra
What is the average blood flow through the kidneys per minute?
(a) 1000 cc
(b) 1200 cc
(c) 200 cc
(d) 500 cc
Option b – 1200 cc
The yellow color of human urine is due to a pigment called ( Biology Olympiad Questions )
(a) Cytochrome
(b) Urochrome
(c) Haemochrome
(d) Phenolichrome
Option b – Urochrome
How many liters of urine does a healthy human being excrete in 24 hours?
(a) 1.5
(b) 3.0
(c) 6.0
(d) 9.0
Option a – 1.5
(a) Excretory system
(b) Reproductive system
(c) Respiratory system
(d) Nervous system
Option a – Excretory system
When the kidneys fail to function, there is an accumulation of
(a) Fats in the body
(b) Proteins in the body
(c) Sugar in the blood
(d) Nitrogenous waste products in the blood
Option d – Nitrogenous waste products in the blood
Water loss through sweating on the body surface is dependent on
(a) Only temperature of the environment
(b) Only moisture of the environment
(c) Both (a) and (b)
(d) Neither (a) nor (b)
Option c – Both (a) and (b)
The part of the kidney through which the ureter, blood vessels, and nerves enter is ( Biology Olympiad Questions )
(a) Renal cortex
(b) Renal medulla
(c) Hilum
(d) Urethra
Option c – Hilum
Which one of the following is not formed in our body?
(a) Vitamin-A
(b) Protein
(c) Enzyme
(d) Hormone
Option a – Vitamin-A
Which one of the following vitamins has a role in blood clotting? ( Biology Olympiad Questions )
(a) Vitamin A
(b) Vitamin B
(c) Vitamin D
(d) Vitamin K
Option d – Vitamin K
In the human body, which element has the highest percentage?
(a) Hydrogen
(b) Nitrogen
(c) Carbon
(d) Oxygen
Option d – Oxygen
Dogs are herbivores ( Biology Olympiad Questions )
(a) true
(b) false
(c) None of the above
(d) All of the above
Option b – false
The organisms that spend their life on the body of a living host are called
(a) ectoparasites
(b) endoparasites
(c) semi-parasites
(d) hyper-parasites
Option a – ectoparasites
The animal that captures and feeds on other animals is called a ( Biology Olympiad Questions )
(a) predator
(b) prey
(c) parasite
(d) host
Option a – predator
Animals that are parasites on plants are
(a) nematodes
(b) lac insect
(c) aphids
(d) All of the above
Option d – All of the above
In which of the following organs is carbohydrate stored as glycogen?
(a) Intestine
(b) Stomach
(c) Liver
(d) Pancreas
Option c – Liver
After digestion, protein is converted into ( Biology Olympiad Questions )
(a) fat
(b) glucose
(c) amino acid
(d) sucrose
Option c – amino acid
Which one of the following is not a good source of calcium?
(a) Rice
(b) Ragi
(c) Skimmed milk
(d) Egg
Option a – Rice
Enzymes are essential for the body because ( Biology Olympiad Questions )
(a) they provide energy.
(b) they control the nervous system.
(c) they are the structural part of the body.
(d) they are the catalysts of biochemical activity.
Option d – they are the catalysts of biochemical activity
Which of the following is necessary for the digestion of food?
(a) Air
(b) Water
(c) Enzyme
(d) Mineral
Option c – Enzyme
Which of the following diseases is caused by a severe deficiency of proteins?
(a) Kwashiorkor
(b) Anemia
(c) Osteoporosis
(d) Goiter
Option a – Kwashiorkor
Which one of the following is considered the easily digestible source of protein?
(a) Egg albumin
(b) Soybean
(c) Fish flesh
(d) Red meat
Option b – Soybean
The deficiency of which nutrient causes night blindness?
(a) Vitamin K
(b) Vitamin C
(c) Proteins
(d) Vitamin A
Option d – Vitamin A
Which of the following is a fat-soluble vitamin that plays a role in blood clotting, bone metabolism, and regulating blood calcium levels?
(a) Vitamin C
(b) Vitamin B
(c) Vitamin K
(d) Vitamin A
Option c – Vitamin K
Which one of the following diseases may be caused by the deficiency of Vitamin C?
(a) Rickets
(b) Rabies
(c) Hepatitis
(d) Scurvy
Option d – Scurvy
Which one of the following statements about a healthy diet is correct?
(a) Regular eating of high-energy snacks between meals is healthy, since it provides energy and vitamins in plenty.
(b) Fruits and vegetables make a good choice because their energy content is high.
(c) A balanced diet must contain plenty of fat and protein with little carbohydrates and fiber.
(d) An optimal quantity of fat, protein, and carbohydrates with an adequate amount of water and fiber makes a healthy diet.
Option d – An optimal quantity of fat, protein, and carbohydrates with an adequate amount of water and fiber makes a healthy diet
Which of the following statements regarding vitamins is not correct?
(a) Some vitamins can be synthesized by intestinal microbes.
(b) Some vitamins function like hormones.
(c) Some vitamins are stored in the body.
(d) Vitamin K is a water-soluble vitamin.
Option d – Vitamin K is a water-soluble vitamin
Vitamin C is also known as
(a) Ascorbic acid
(b) Tartaric acid
(c) Malic acid
(d) Acetic acid
Option a – Ascorbic acid
Deficiency of which vitamin causes rickets disease.
(a) Vitamin C
(b) Vitamin A
(c) Vitamin B
(d) Vitamin D
Option d – Vitamin D
Xerophthalmia is caused due to the deficiency of Vitamin…
(a) C
(b) K
(c) D
(d) A
Option d – A
Energy is stored in the liver and muscles in the form of
(a) Carbohydrate
(b) Fat
(c) Protein
(d) Glycogen
Option d – Glycogen
The acid in gastric juice is
(a) Acetic acid
(b) Nitric acid
(c) Hydrochloric acid
(d) Sulphuric acid
Option c – Hydrochloric acid
Which among the following is the food tube?
(a) Thymus
(b) Larynx
(c) Aorta
(d) Oesophagus
Option d – Oesophagus
The complete digestion of carbohydrates, proteins, and fats occurs in
(a) Stomach
(b) Liver
(c) Small intestine
(d) Large intestine
Option c – Small intestine
Which one of the following is not a function of the liver?
(a) Conversion of glucose into glycogen.
(b) Production of urea.
(c) Destruction of dead and worn-out red blood cells.
(d) Absorption of food and excess water from the undigested food.
In the human body, most of the digestive process takes place in
(a) Pancreas
(b) Large intestine
(c) Small intestine
(d) Stomach
Option c – Small intestine
In the buccal cavity of a human being, digestion of which one of the following gets started?
(a) Protein
(b) Fat
(c) Carbohydrate
(d) None of these
Option c – Carbohydrate
How many ‘canine teeth’ does an adult human have?
(a) 8
(b) 4
(c) 6
(d) 2
Option b – 4
Bile is stored in
(a) Mouth
(b) Liver
(c) Gallbladder
(d) Stomach
Option c – Gallbladder
Which one of the following is the correct sequence in the order of decreasing length of the structural parts given below of the small intestine in the human body?
(a) Jejunum – Duodenum – Ileum
(b) Ileum – Duodenum – Jejunum
(c) Jejunum – Ileum – Duodenum
(d) Ileum – Jejunum – Duodenum
Option d – Ileum – Jejunum – Duodenum
Which one of the following is not a digestive enzyme in the human system?
(a) Trypsin
(b) Gastrin
(c) Ptylin
(d) Pepsin
Option b – Gastrin
The acidic, semi-digested food coming out of the stomach is neutralized by
(a) Pancreatic juice
(b) Duodenal secretion
(c) Large intestine secretion
(d) Bile juice
Option d – Bile juice
An enzyme that helps in the digestion of protein is
(a) Urease
(b) Sulfatase
(c) Trypsin
(d) Protease
Option c – Trypsin
The enzyme involved in the hydrolysis of starch to glucose is
(a) Invertase
(b) Amylase
(c) Dehydrogenase
(d) Anhydrase
Option b – Amylase
Which of the following body organs does not secrete digestive enzymes?
(a) Liver
(b) Stomach
(c) Pancreas
(d) Salivary glands
Option a – Liver
If, by an unknown accident, the acid-secreting cells of the stomach wall of an individual are damaged, digestion of which one of the following biomolecules will be affected to a greater extent?
(a) Protein only
(b) Lipid
(c) Carbohydrate only
(d) Protein and carbohydrate
Option a – Protein only
Maximum nutritive element absorbed by blood from which part of the alimentary canal?
(a) Large intestine
(b) Mouth
(c) Small intestine
(d) Stomach
Option c – Small intestine
Production of which one of the following is a function of the liver?
(a) Lipase
(b) Urea
(c) Mucus
(d) Hydrochloric acid
Option b – Urea
The saliva helps in the digestion of
(a) Starch
(b) Proteins
(c) Fibers
(d) Fat
Option a – Starch
Which one of the following human organs is responsible for the detoxification of alcohol?
(a) Liver
(b) Lung
(c) Heart
(d) Kidney
Option a – Liver
The amount of which of the following components in the air does not change in the process of respiration?
(a) Carbon dioxide (CO₂)
(b) Oxygen
(c) Water vapors
(d) Nitrogen
Option d – Nitrogen
Movement of the air into and out of the lungs is carried out by
(a) Imbibition
(b) Pressure gradient
(c) Osmosis
(d) Diffusion
Option b – Pressure gradient
Mammals respire by
(a) Gills
(b) Trachea
(c) Skin
(d) Lungs
Option d – Lungs
Which is not a disorder of the digestive system?
(a) Jaundice
(b) Diarrhea
(c) Emphysema
(d) Constipation
Option c – Emphysema
Which of the following is the first enzyme mixing with food in the digestive region?
(a) Trypsin
(b) Cellulose
(c) Pepsin
(d) Amylase
Option d – Amylase
The abnormal frequent movement of the bowel and increased liquidity of the feces is called
(a) Vomiting
(b) Indigestion
(c) Constipation
(d) Diarrhea
Option d – Diarrhea
(a) Kwashiorkor
(b) Marasmus
(c) Both (a) and (b)
(d) Xerophthalmia
Option c – Both (a) and (b)
The enzyme found in saliva is
(a) Renin
(b) Ptyalin
(c) Tenin
(d) Resin
Option b – Ptyalin
With reference to a normal human being, which one of the following statements is not correct?
(a) Human saliva is slightly alkaline.
(b) An adult human may secrete 1 to 1.5 liters of saliva per day.
(c) Saliva is secreted by six pairs of salivary glands in human beings.
(d) The salivary enzyme (ptyalin) breaks down cooked starch into maltose.
Option c – Saliva is secreted by six pairs of salivary glands in human beings
Which one of the following enzymes converts proteins into amino acids?
(a) Pepsin
(b) Lactase
(c) Urease
(d) Zymase
Option a – Pepsin
The complete oxidation of sucrose in the presence of oxygen into CO2, water, and energy is called
(a) Aerobic respiration
(b) Anaerobic respiration
(c) Glycolysis
(d) Hydrolysis
Option a – Aerobic respiration
Which of the following statements is incorrect about Nasopharynx?
(a) Internal nostrils open into the nasopharynx.
(b) It is the common passage for air only.
(c) It is a portion of the pharynx.
(d) The nasopharynx opens through the glottis of the larynx region into the trachea.
Option b – It is the common passage for air only
The larynx is present between
(a) Epiglottis and glottis
(b) Trachea and bronchiole
(c) Epiglottis and trachea
(d) Bronchus and epiglottis
Option c – Epiglottis and trachea
Which portion of the human respiratory system is called the soundbox?
(a) Larynx
(b) Trachea
(c) Nasopharynx
(d) Glottis
Option a – Larynx
In breathing movements, air volume can be estimated by
(a) Stethoscope
(b) Hygrometer
(c) Sphygmomanometer
(d) Spirometer
Option d – Spirometer
Carbon monoxide poisoning affects mainly which one of the following?
(a) Digestive activity
(b) Liver functioning
(c) Kidney functioning
(d) Oxygen-carrying capacity of blood
Option d – Oxygen-carrying capacity of blood
When there is a decrease in the concentration of oxygen in the blood, the rate of breathing
(a) Decreases
(b) Increases
(c) Does not change
(d) First decreases, then increases
Option b – Increases
Which of the following is known as the energy currency for cellular processes?
(a) Glucose
(b) ATP
(c) ADP
(d) Pyruvic acid
Option b – ATP
What function does blood perform in the body?
(a) Takes oxygen to all parts
(b) Maintains liquidity
(c) Helps in digestion
(d) Helps in erection
Option a – Takes oxygen to all parts
In which part of the body is blood produced?
(a) Bone marrow
(b) Lungs
(c) Brain
(d) Heart
Option a – Bone marrow
The blood pressure of an individual is 140 mm Hg. In this statement, ‘Hg’ refers to
(a) Hydrogen
(b) Mercury
(c) Hygrometer
(d) Heliograph
Option b – Mercury
Name the chronic respiratory disorder caused mainly by cigarette smoking
(a) Asthma
(b) Respiratory acidosis
(c) Respiratory alkalosis
(d) Emphysema
Option d – Emphysema
Name the pulmonary disease in which alveolar surface area involved in gas exchange is drastically reduced due to damage in the alveolar walls.
(a) Pleurisy
(b) Emphysema
(c) Pneumonia
(d) Asthma
Option d – Emphysema
Mark the correct pair of muscles involved in normal breathing in humans.
(a) External and internal intercostal muscles
(b) Diaphragm and abdominal muscles
(c) Diaphragm and external intercostal muscles
(d) Diaphragm and intercostal muscles
Option d – Diaphragm and intercostal muscles
Which one of the following is the correct statement for respiration in humans?
(a) Cigarette smoking may lead to inflammation of bronchi.
(b) Neural signals from the pneumotoxic center in the pons region of the brain can increase the duration of inspiration.
(c) Workers in grinding and stone-breaking industries may suffer from lung fibrosis.
(d) About 90% of Carbon dioxide (CO₂) is carried by hemoglobin as carbamino-hemoglobin.
Option c – Workers in grinding and stone-breaking industries may suffer from lung fibrosis
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