TestUstad

Free Biological Importance of Water MCQs with Answers

87 Biological Importance of Water MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.

Last updated

87 questions · page 5 of 5

81. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is?

  • A. Dipole nature
  • B. High specific heat of vaporization
  • C. High specific heat capacity
  • D. Its liquid state

Explanation: Due to high specific heat capacity, water does not heat up easily and does not loose heat easily, as a result the temperature remains…

Read the full explanation →
Correct answer: High specific heat capacity

82. Name the human tissues that contain about 85% water

  • A. Nerve cells.
  • B. Brain cells.
  • C. Bone cells.
  • D. None of these.

Explanation: b) Brain cells: Brain cells, which include various types of neurons and glial cells, also contain a significant amount of water due to…

Read the full explanation →
Correct answer: Brain cells.

83. Human bone cells contain _ % of water.

  • A. 20
  • B. 40
  • C. 85
  • D. 90

Explanation: Bone is a complex and rigid connective tissue that contains various components, including cells, fibres, and minerals.

Read the full explanation →
Correct answer: 20

84. _ forms almost three-fourth of the body by weight.

  • A. Water
  • B. Protein
  • C. Carbohydrates
  • D. Lipids

Explanation: Water (Option A) forms almost three-fourths of the body by weight. The human body is composed of a significant amount of water, which…

Read the full explanation →
Correct answer: Water

85. Biologically, it plays key roles in maintaining the integrity of lipid bilayer membranes.

  • A. Hydrophilic exclusion
  • B. Hydrophobic
  • C. Specific heat capacity exclusion
  • D. Heat of vaporization

Explanation: Biologically, the hydrophobic interactions (Option B) play key roles in maintaining the integrity of lipid bilayer membranes.

Read the full explanation →
Correct answer: Hydrophobic

86. The specific heat of vaporization of water plays an important role in the regulation of heat produced by:

  • A. Reduction
  • B. Oxidation
  • C. Redox
  • D. None of above

Explanation: The specific heat of vaporization of water plays an important role in the regulation of heat produced by OxidationSpecific heat of…

Read the full explanation →
Correct answer: Oxidation

87. Which type of bond must be broken for water to vaporize?

  • A. Nonpolar covalent bonds
  • B. Polar covalent bonds
  • C. Hydrogen bonds
  • D. Covalent bonds

Explanation: For water to vaporize (turn from a liquid into a gas), the type of bond that must be broken is Hydrogen bondsWater molecules are held…

Read the full explanation →
Correct answer: Hydrogen bonds
Start Free Biological Importance of Water Practice MCQs Test