Lecture Week 1 - C1 - MOLECULES OF LIFE

What is the chemical formula of water?

• H₂O₂

• CO₂

• H₂O

• OH₂

Which type of bond holds the hydrogen and oxygen atoms together in a water molecule?

• Ionic bond

• Covalent bond

• Hydrogen bond

• Metallic bond

Why is water considered a polar molecule?

• It has equal distribution of electrons

• It contains ions

• It has unequal distribution of shared electrons

• It has no charge

Which of the following is a property of water due to hydrogen bonding?

• Insoluble in organic solvents

• Universal solvent

• High density at 100°C

• Non-polar behavior

Which of the following is a monosaccharide?

• Maltose

• Glucose

• Sucrose

• Lactose

What is the general formula of a monosaccharide?

• CH₃OH

• (CH₂O)ₙ

• C₆H₁₂O₂

• C₁₂H₂₂O₁₁

What is formed when two monosaccharides join together?

• Polymer

• Lipid

• Disaccharide

• Protein

What happens during the hydrolysis of a disaccharide?

• Water is removed

• Heat is released

• A new bond is formed

• Water is added to break the bond

Which of the following is NOT a type of lipid?

• Phospholipid

• Steroid

• Triglyceride

• Glucose

Which part of a phospholipid is hydrophilic?

• Fatty acid tail

• Hydrocarbon chain

• Glycerol and phosphate head

• Entire molecule