SYI Monomers and polymers

Which of the following is NOT one of the key molecules required to build structures in organisms?

• Water

• Proteins

• Carbohydrates

• Lipids

Answer explanation

Water, though vital to life, does not directly build structures in organisms. Proteins, Carbohydrates, Lipids, and Nucleic Acids are the key molecules that construct structures. These molecules are the fundamental building blocks of life, forming cells and tissues in organisms.

Monomers are smaller units from which larger molecules are made. True or False?

• True
• False

Polymers are made from a large number of ______________ joined together in a chain.

• Lipids
• Monomers
• Proteins
• Nucleic Acids
• Carbohydrates

Carbon compounds can form small single subunits called _____________.

• Macromolecules
• Polymers
• Monomers
• Nucleotides
• Amino Acids

Macromolecules are very large molecules containing ___________ or more atoms.

• 1000
• 500
• 100
• 2000
• 5000

Are all macromolecules polymers?

• Yes
• No

What type of bond results from the sharing of two or more electrons between two atoms?

• Ionic bond
• Hydrogen bond
• Covalent bond
• Metallic bond
• Van der Waals

Covalent bonds are very stable because _____________________.

• They have a low energy requirement to break.
• They form between metal atoms.
• They involve the transfer of electrons.
• They involve the sharing of electrons.
• They only occur in gases.

How many covalent bonds does a carbon atom typically form due to its outer orbital electrons?

• 1
• 2
• 3
• 4
• 5

Polymerization occurs when ________________.

• Monomers combine by covalent bonds to form polymers.
• Water is removed during a reaction.
• Oxygen is added to monomers.
• Monomers combine by hydrogen bonds.
• Monomers combine to form macromolecules.