IB Biology Topic 6

What are the three main properties of water?

• solid, low specific heat capacity, buoyancy

• gas, low specific heat capacity, viscosity

• liquid, high specific heat capacity, surface tension

• solid, low specific heat capacity, adhesion

Tags

NGSS.MS-ESS2-4

Explain the concept of polarity in water molecules.

• Absence of electrical charge within the molecule

• Equal distribution of electrical charge within the molecule

• Uneven distribution of electrical charge within the molecule

• Polarity refers to the shape of the water molecule

Why is water considered a universal solvent?

• Water is considered a universal solvent because it is made up of many different elements.

• Water is considered a universal solvent because it is highly acidic.

• Water is considered a universal solvent because it has a low boiling point.

• Water is considered a universal solvent because it has the ability to dissolve a wide variety of substances due to its polar nature.

How does water play a crucial role in biological systems?

• Water is the main component of cells and is involved in various metabolic processes.

• Water is harmful to biological systems.

• Water is only important for hydration.

• Water has no role in biological systems.

Tags

NGSS.HS-LS2-5

Hydrophilic means...

• water-loving

• water-fearing

• nonpolar

• lipid soluble

A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails. 

• phospholipid 

• Carbohydrate

• Cholesterol 

• Protein 

At room temperature, water is a liquid and methane is a gas. Which molecular property explains this difference?

• Higher molecular mass of water

• Dipolarity of water

• Presence of more hydrogen in methane

• Higher boiling point than methan

Tags

NGSS.MS-PS1-1

Which substance is more likely to dissolve in water?

• Hydrophillic

• Hydrophobic

Which property of water allows plants to transport water?

• Cohesion

• Adhesion

• Thermal

• Solvent

Which is a physiological cause of peripheral fatigue in high-intensity exercise?

• Reduction in muscle glycogen reserves

• Depletion of acetylcholine

• Depletion in creatine phosphate

• Reduction in Ca2+ release