Biological Molecules and Structures

This video covers A-level biology topic one, focusing on biological molecules. It explains the structure and function of monomers, polymers, carbohydrates, lipids, proteins, and nucleic acids. The video also discusses biochemical tests for these molecules and the properties of water and inorganic ions. Key concepts include enzyme function, DNA replication, and the role of different biological molecules in living organisms.

What is the process called when two monomers join to form a polymer?

• Oxidation

• Condensation

• Hydrolysis

• Reduction

Which of the following is a disaccharide?

• Galactose

• Sucrose

• Fructose

• Glucose

What is the main structural difference between triglycerides and phospholipids?

• Number of glycerol molecules

• Presence of a phosphate group

• Type of fatty acids

• Number of ester bonds

Which level of protein structure is characterized by alpha helices and beta sheets?

• Quaternary

• Tertiary

• Secondary

• Primary

What model is currently accepted to explain enzyme specificity?

• Lock and Key

• Induced Fit

• Allosteric

• Fluid Mosaic

What is the primary function of DNA?

• Transporting oxygen

• Storing genetic information

• Catalyzing reactions

• Energy storage

Which component of ATP is responsible for its energy storage capability?

• Hydrogen bonds

• Phosphate groups

• Adenine base

• Ribose sugar

What property of water allows it to act as a solvent?

• Polarity

• Cohesion

• High heat capacity

• Low density

Which ion is crucial for the transport of oxygen in the blood?

• Sodium

• Iron

• Calcium

• Potassium

What is the role of hydrogen ions in biological systems?

• Forming cell membranes

• Transporting oxygen

• Storing energy

• Altering pH levels