Phospholipid bilayer and active and passive transport and simple

Front

What is the structure of a phospholipid?

Back

A phospholipid consists of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) fatty acid tails.

Front

What is the function of the phospholipid bilayer?

Back

The phospholipid bilayer forms the fundamental structure of cell membranes, providing a barrier that separates the interior of the cell from the external environment.

Front

What are transfer proteins?

Back

Transfer proteins, also known as transport proteins, facilitate the movement of substances across the cell membrane.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What happens to a cell in a hypertonic solution?

Back

A cell in a hypertonic solution will shrink as water moves out of the cell to balance the solute concentration.

Front

What happens to a cell in a hypotonic solution?

Back

A cell in a hypotonic solution will swell and may burst as water moves into the cell.

Front

What are eukaryotes?

Back

Eukaryotes are organisms whose cells contain a nucleus and membrane-bound organelles.

Front

What is the role of glycoproteins in the cell membrane?

Back

Glycoproteins play a key role in cell recognition and communication, often serving as receptors for signaling molecules.

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of cell membranes as a mosaic of various proteins that float in or on the fluid lipid bilayer, allowing for flexibility and movement.