Biomolecules and Their Functions

The video tutorial explores the chemical composition of living organisms, focusing on both organic and inorganic compounds. It explains elemental and chemical analysis techniques used to identify these compounds. The tutorial delves into biomolecules like amino acids, proteins, polysaccharides, and nucleic acids, discussing their structures, functions, and roles in metabolism. It also covers the bonding mechanisms in these biomolecules, emphasizing their importance in maintaining the structure and function of living organisms.

What technique is used to determine the elemental composition of living tissues?

• Chromatography

• Elemental analysis

• Centrifugation

• Spectroscopy

Which of the following is a primary metabolite?

• Carbon

• Flavonoids

• Alkaloids

• Rubber

Which of the following is a secondary metabolite?

• Sodium

• Nitrogen

• Essential oils

• Sulfur

What is the unique property of amino acids that allows them to act as both acids and bases?

• Presence of a carboxy group

• Ionizable nature of NH2 and COOH groups

• Formation of peptide bonds

• Ability to form zwitterions

What is the role of lipids in the cell membrane?

• They act as enzymes

• They are hydrophobic and form the membrane structure

• They form vesicles

• They are water-soluble

Which type of biomolecule is involved in heredity?

• Proteins

• Nucleic acids

• Carbohydrates

• Lipids

What type of bond links nucleotides in nucleic acids?

• Glycosidic bond

• Peptide bond

• Phosphodiester bond

• Hydrogen bond

What is the primary structure of a protein?

• The three-dimensional shape of the protein

• The sequence of amino acids

• The folding of the protein into alpha helices

• The arrangement of protein subunits

Which protein structure level is disrupted when a protein is denatured?

• Quaternary

• Tertiary

• Secondary

• Primary

What is the significance of the Watson-Crick model of DNA?

• It describes DNA as a single helix

• It depicts DNA as a linear chain

• It shows DNA as a double helix with anti-parallel strands

• It explains DNA as a triple helix