Biological Molecules and Their Functions

The video tutorial by Mr. Matthew covers the properties of biological molecules, focusing on monomers and polymers. It explains the processes of dehydration synthesis and hydrolysis, and delves into the structure and function of nucleic acids, proteins, carbohydrates, and lipids. The tutorial highlights the chemical properties and interactions of these macromolecules, providing insights into their roles in living organisms.

What is a monomer?

• A single subunit that can join with others

• A complex carbohydrate

• A type of protein

• A large molecule made of repeating units

Which process involves removing water to form a bond between monomers?

• Dehydration synthesis

• Polymerization

• Condensation

• Hydrolysis

What holds the two strands of a DNA molecule together?

• Covalent bonds

• Ionic bonds

• Hydrogen bonds

• Peptide bonds

Which component is NOT part of a nucleotide?

• A phosphate group

• A lipid tail

• A five-carbon sugar

• A nitrogenous base

What is the primary structure of a protein?

• A folded polypeptide chain

• A sequence of amino acids

• A three-dimensional shape

• A complex of multiple polypeptides

Which type of interaction is NOT involved in protein tertiary structure?

• Ionic interactions

• Hydrogen bonds

• Disulfide bridges

• Covalent bonds

What is the main difference between starch and cellulose?

• Starch is a protein, cellulose is a carbohydrate

• Starch is digestible by humans, cellulose is not

• Starch is a monosaccharide, cellulose is a disaccharide

• Starch is a lipid, cellulose is a protein

What is a characteristic of unsaturated fatty acids?

• They are found in butter

• They contain one or more double bonds

• They are solid at room temperature

• They have only single bonds

Which of the following is NOT a function of lipids?

• Catalyzing chemical reactions

• Structural component of cell membranes

• Energy storage

• Insulation

What is the role of phospholipids in cells?

• They form the cell membrane

• They store genetic information

• They act as enzymes

• They provide structural support