Lipids and Proteins Biochemical Analysis Flashcards

Vocabulary flashcards covering lipid hydrophobicity, emulsification, and protein denaturation based on kitchen-chemistry laboratory activities.

Translucent spot test

A physical lipid matrix assay used to identify the presence of lipids in materials by observing a persistent 'grease window' on brown paper that allows light to pass through.

Biological Hydrophobicity

The property of a substance that causes it to separate into distinct phases when placed within aqueous boundaries, such as vegetable oil layering on water.

Amphipathic emulsifier

A molecule, such as dish soap, characterized by a dual-affinity structural mechanism that enables it to link hydrophobic oils with a polar water environment.

Emulsion matrix

A cloudy, unified structural state formed when an emulsifier disrupts oil surface bounds, allowing oil and water to mix into a single phase.

Phospholipid bilayer

The composition of cell membranes that utilizes the hydrophobic nature of lipids to keep the inside contents of a cell separated from the outside environment.

Protein Denaturation

The disruption of protein folding chains and structural configurations (secondary, tertiary, or quaternary) caused by factors like polar organic solvents, weak acids, or kinetic thermal heat.

Coagulation

The macroscopic clumping or formation of white thread lines, clouding curdles, or solid gelatinous masses resulting from structural alterations in proteins.

Acetic acid

The active component in generic white kitchen vinegar used to induce acidification and disrupt the chemical interactions holding an amino acid folding layout together.

70% Isopropyl alcohol

A commercial rubbing alcohol used as a volatile organic solvent to denature bacterial proteins, protecting patients from infections during medical injections.

$$41^{\circ}\text{C}$$

The threshold for a severe biological spike in core body temperature (fever) that is lethal to humans because it denatures metabolic enzymes.

Souring milk

A biochemical process where the development of thick white chunks or curdles occurs due to acid-induced denaturation, similar to adding vinegar to a protein matrix.