Molecular Biology - All About That H20. (IB)

Water's unique properties come down to it's molecular structure. Label this water molecule and its' charges.

Water has a unique charge causing it to possess strange properties. Among these are...?

Water molecules are polar and the bonding between the atoms involve the sharing of electrons. These electrons are shared equally.

Having a slight potential charge is called. Being [blank_start]polar[blank_end].

The hydrogen bond in a water molecule is weak.

[blank_start]Surface tension[blank_end] is caused by the [blank_start]cohesive[blank_end] nature of [blank_start]hydrogen[blank_end] bonding, resisting the penetrating of its' surface.

Adhesion is defined by the property of "sticking" to [blank_start]other polar molecules[blank_end].

Glucose is soluble in water. Therefore it is [blank_start]hydrophilic[blank_end].

All lipids are hydrophobic.

Organic substances are defined by having the element [blank_start]carbon[blank_end] present.

Water is a good [blank_start]solvent[blank_end].

Things can float on water because it is [blank_start]dense[blank_end].

The amount of energy needed to turn liquid water into water vapour (gas), is called: The [blank_start]Latent[blank_end] [blank_start]Heat[blank_end] of [blank_start]Vaporisation[blank_end].

Water is [blank_start]slow[blank_end] to change temperature.

When water freezes, molecules [blank_start]expand[blank_end] causing less [blank_start]hydrogen[blank_end] bonds to exist, causing the water to be less [blank_start]dense[blank_end] therefore ice floats on water.

Water has...

Not all metabolites are soluble.

Materials with an affinity for water are described as [blank_start]hydrophilic[blank_end].

Because water is [blank_start]slow[blank_end] to change it's temperature, aquatic environments [blank_start]can[blank_end] exist in cold climates because the ice [blank_start]floats[blank_end] to the [blank_start]tops[blank_end] of bodies of water. Water also aids in the transport of water in plants by the [blank_start]xylem[blank_end] vessels as well as the transportation of minerals through the blood, through narrow [blank_start]capillaries[blank_end] in the circulatory system.

Water breaks easily under tension.