BIO NMDCAT

Mitochondria harvest chemical energy from food molecules via cellular respiration, producing ATP to power energy-dependent cell processes.

The plant cell's protoplast shrinks inward while its rigid wall maintains the outer cell shape; the wall-less animal cell shrivels up completely.

Integrins are transmembrane receptor proteins that link the intracellular cytoskeleton to the extracellular matrix, facilitating cell signaling.

The branched sugar chains of the glycocalyx act as molecular tags, enabling the immune system to recognize self cells and coordinate interactions.

Catalase is a tetrameric protein enzyme containing four heme groups, optimized to break down hydrogen peroxide into water and oxygen.

The smooth ER houses the key enzyme pathways required for lipid metabolism, cholesterol processing, and steroid hormone biosynthesis.

Proteinoplasts are specialized, non-pigmented leukoplasts optimized to store high-density protein reserves inside seeds and kernels.

The random, multi-directional alignment of microfibrils allows the primary wall to stretch and expand uniformly in response to turgor.

The plasma membrane contains transport proteins and acts as the true selective barrier regulating what enters or leaves the cytoplasm.

The Casparian strip is a suberized chemical barrier in the endodermis that forces water to enter the living protoplast via symplastic transport.

As a plant cell matures, the central vacuole expands dramatically, compressing the active cytoplasm into a thin layer against the wall.

Turgor pressure acts as a hydraulic jack, stretching the primary wall when specific enzymes loosen the cross-linked cellulose fibers.

Cilia and flagella grow out from a basal body, a structural template built from a modified centriole with a 9+0 microtubule triplet layout.

Hemicelluloses are branched polysaccharides that form hydrogen bonds with cellulose microfibrils, anchoring the structural meshwork.

Lacking a rigid cell wall allows the animal plasma membrane to stretch, fold, and change shape smoothly, guided by the dynamic cytoskeleton.

Both plant and animal cells rely on the conserved F1​F0​-ATP synthase complex to generate ATP through oxidative phosphorylation.

A desmotubule is a continuous tube of specialized endoplasmic reticulum that runs through the center of a plasmodesmatal channel.

Exocytosis involves routing transport vesicles from the Golgi to the plasma membrane, where they fuse to release their contents outside.

Bacterial cell walls are made of peptidoglycan (glycan chains cross-linked by short peptides), whereas plant walls rely on cellulose.