Biochemistry and Properties of Water Quiz

What is the main component of the cellular apparatus of living organisms?

• Hydrogen compounds

• Nitrogen compounds

• Carbon compounds

• Oxygen compounds

What type of bonds do organic molecules have?

• Hydrogen bonds

• Metallic bonds

• Covalent bonds

• Ionic bonds

What is the function of biochemistry?

• Studying chemical reactions in minerals

• Studying chemical reactions in the environment

• Studying chemical reactions in living cells and organisms

• Studying chemical reactions in non-living organisms

What is the average number of hydrogen bonds in liquid water at 10ᵒC?

• 4.2

• 3.4

• 2.8

• 1.5

What gives water its unusual properties such as higher melting and boiling points?

• Hydrophobic interactions

• Van der Waals forces

• Electrostatic interactions

• Hydrogen bonds

What is the pH range of blood in the human body?

• 6.0-6.5

• 6.9-7.4

• 8.5-9.0

• 7.5-8.0

What is the main buffer system in the extracellular fluid?

• Protein buffer system

• Bicarbonate–carbonic acid buffer system

• Phosphate buffer system

• Hemoglobin buffer system

What is the main intracellular buffer of the blood?

• Hemoglobin buffer system

• Protein buffer system

• Phosphate buffer system

• Bicarbonate–carbonic acid buffer system

What is the main function of buffers in the body?

• Increase the concentration of solutes in the body

• Resist abrupt changes in pH

• Replenish alkali in the body

• Remove acids from the body

What is the main function of the phosphate buffer system?

• Maintain a constant pH of blood

• Maintain a constant pH of intracellular fluid

• Maintain a constant pH of extracellular fluid

• Maintain a constant pH of plasma