Practice Questions

Mosaic implies a diverse pattern of different components (proteins, lipids, carbs) packed together.

While proteins may contribute more by mass, phospholipids are the most numerous molecules.

Because facilitated diffusion uses a limited number of proteins, the rate can reach a maximum (saturation).

The Robertson model (Unit Membrane) described a fixed, trilaminar structural arrangement.

The fatty acid tails create a hydrophobic region that prevents passage of polar substances.

Most cytoskeletal anchors are peripheral proteins attached to the cytoplasmic surface.

Singer and Nicolson proposed the Fluid Mosaic Model in 1972.

Plants typically have higher levels of unsaturated fats to adapt to ambient temperatures.

Many peripheral proteins are connected to the cytoskeleton on the cytoplasmic side of the membrane.

It is passive (no ATP) but uses a protein facilitator.