Free Human Body and Health MCQs with Answers

81. The famous book; Al - Qanun was written by the Muslim scientist ?

• A. Jabar bin Hayyan
• B. Zakariya Al - Razi
• C. Abu Ali Sina
• D. Abdul Qasim Majreeti

Explanation: Al-Qanun fi al-Tibb, known in English as The Canon of Medicine, was written by Abu Ali Sina, or Avicenna. It was a major medical reference for centuries in both the Muslim world and Europe.

82. Humming bird belongs to a category called ?

• A. Ectotherm
• B. Endotherm
• C. Exotherm
• D. Heterotherm.

Explanation: Hummingbirds are endotherms because they generate and regulate their body heat internally through metabolism. Ectotherms depend mainly on environmental heat, while heterothermy is a variable-temperature strategy rather than the standard classification here.

83. What is bacteria that helps make yogurt ?

• A. Escherichia Coli
• B. Staphylococcus aureus
• C. Lactobacillus
• D. All of these.Physics

Explanation: Lactobacillus converts lactose in milk into lactic acid, lowering the pH and causing milk proteins to form yogurt. Escherichia coli and Staphylococcus aureus are not the usual yogurt-making bacteria.

84. What is the name of bacteria that causes Lyme Disease.

• A. Escherichia Coli
• B. Staphylococus aureus
• C. Borrelia burgdorferi
• D. None of these

Explanation: Lyme disease is caused mainly by Borrelia burgdorferi, a spiral-shaped bacterium transmitted by infected Ixodes ticks. The other listed bacteria cause different infections.

85. What are the components of Balance Diet?

• A. Carbohydrates+Fats
• B. Proteins+Water
• C. Vitamins+Minerals
• D. All of these

Explanation: A balanced diet includes carbohydrates, proteins, fats, vitamins, minerals and water in suitable proportions. Each listed pair is part of this overall set, so all of these is correct.

86. Examples of Monosaccharides are ___________.

• A. Glucose
• B. Galactose
• C. Fructose
• D. All of these

Explanation: Glucose, galactose and fructose are all monosaccharides, meaning they are single sugar units that cannot be hydrolysed into simpler carbohydrates. Therefore, all of these is correct.

87. A balanced diet quality formula recommended by World Health Organization is ____________.

• A. Carbohydrates 58% + Proteins 12% + Fats 30%
• B. Mineral+Proteins+Fats
• C. Fats+Proteins+Minerals
• D. None of these

Explanation: The listed distribution totals 100% and falls within commonly cited dietary energy ranges, with most energy from carbohydrates, followed by fats and a smaller protein share. The other options are incomplete because they give no proportions and omit carbohydrates or water.

88. Chief builder of the body are ___________?

• A. Carbohydrates
• B. Proteins
• C. Fats
• D. None of these

Explanation: Proteins are called body-building nutrients because they form and repair muscles, skin, enzymes and other tissues. Carbohydrates and fats mainly supply or store energy.

89. __________ are called the powerhouses of the cell?

• A. Mitochondria
• B. Vesicles
• C. Lungs
• D. Liver

Explanation: Mitochondria produce most of a cell's usable ATP through cellular respiration, which is why they are called the cell's powerhouses. Vesicles mainly transport materials, while lungs and liver are organs, not cell organelles.

90. The energy value of food is measured in_______?

• A. Joule
• B. Calories
• C. Tesla
• D. Proteins

Explanation: Food energy is traditionally expressed in calories, especially kilocalories on nutrition labels. The joule is the SI unit of energy, but calories are the customary unit used for food energy.