Biochemistry - Key Concepts

Biochemistry Overview

Carbohydrates

• Monosaccharides: Basic building blocks, energy sources.

  • α-Glucose, β-Glucose, Mannose, Galactose, Fructose, Deoxyribose, Ribose.

• Disaccharides: Formed from two monosaccharides.

  • Maltose, Sucrose, Lactose.

• Polysaccharides: Long chains of monosaccharides.

  • Amylose, Cellulose, Glycogen.

Lipids

• Composition: Made of hydrocarbon chains and fatty acids.

• Types of Fatty Acids:

  • Saturated: No double bonds.

  • Unsaturated: One or more double bonds.

• Triglycerides: Glycerol + 3 Fatty Acids.

• Phospholipids: Glycerol + 2 Fatty Acids + Phosphate Group.

• Steroids: Characterized by a 4-ring structure.

• Waxes: Esters formed from fatty acids and alcohols.

Proteins

• Amino Acids: Building blocks of proteins with varying R-Groups.

• Polypeptides: Chains of amino acids.

• Structural Levels:

  • Primary: Sequence of amino acids.

  • Secondary: Alpha helices and beta sheets formed by hydrogen bonds.

  • Tertiary: Overall 3D shape from R-group interactions.

  • Quaternary: Interaction of multiple polypeptide chains.

• Denaturation: Loss of function due to environmental conditions.

Nucleic Acids

• Components: Comprised of nucleotide monomers (phosphate group, sugar, nitrogenous base).

• Types:

  • DNA: Double-stranded, A/T and C/G pairing.

  • RNA: Single-stranded, A/U and C/G pairing.

• Functions: Genetic information storage and transmission.

Summary Points

• Carbohydrates: Primary energy source and structural components.

• Lipids: Energy storage, signaling, and membrane structure.

• Proteins: Enzymatic functions and structural roles; sensitive to pH and temperature changes.

• Nucleic Acids: Genetic blueprint for organisms, involved in protein synthesis.