Biology Form 4 (4.1 Water)

Which of the following is an inorganic compound?

• (A)Water

• (B)Protein

• (C)Nucleic acid

• (D)Lipid

Most cells contain about ____________ of water.

• (A)80%

• (B)60%

• (C)75%

• (D)65%

Which elements contain in the water?

• (A) Carbon, Oxygen

• (B) Hydrogen, Oxygen

• (C) Nitrogen, Hydrogen

• (D) Sulphur, Oxygen

Water molecules are ___________molecules

• (A) Complex

• (B) Non polar

• (C) Simple

• (D) Polar

The polarity produces ________ bonds and allows water to act as a ______________.

• (A) Oxygen, Universal Solvent

• (B) Hydrogen, Universal Solvent

The universal solvent properties of water allow solutes such as glucose and electrolytes to be transported through the cytoplasm into cells for biochemical reactions

• (A)Yes

• (B)No

Water molecules are attached to each other through a ___________force.

• (A)adhesive

• (B)cohesive

• (C)magnetic

• (D)kinetic

Water molecule are attached to other surfaces through ____________force.

• (A) cohesive

• (B) adhesive

• (C) magnetic

• (D) kinetic

Both cohesive and adhesive forces produce the __________which allows water to enter and move along narrow spaces, such as in the xylem tube.

• (A) kinetic action

• (B) double action

• (C) capillary action

• (D) force action

Water specific heat capacity = 4.2 kJ kg^{-1 o}C^-1

What is the meaning of 'water specific heat capacity'?

• (A) 4.2 kJ of thermal energy required to raise the temperature of 1 g of water by 1^oC

• (B) 4.2 kJ of thermal energy required to raise the temperature of 1 kg of water by 1^oC

• (c) 4.2 kJ of thermal energy required to raise the temperature of 1 kg of water by 10^oC

• (D) 4.2 kJ of thermal energy required to raise the temperature of 1 kg of water by 10^oC