STAAR Biology Category 1 Review

Front

What is Facilitated Diffusion?

Back

Facilitated diffusion is a type of passive transport that allows substances to cross membranes with the assistance of special proteins. It does not require energy.

Front

What does semi-permeable mean?

Back

Semi-permeable means that a membrane allows only some materials to cross while blocking others.

Front

What is the difference between a lysogenic infection and a lytic infection?

Back

A lysogenic infection allows the virus to remain dormant in the host DNA for a longer period, while a lytic infection leads to the immediate production of new viruses.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is the same on both sides of a membrane, resulting in no net movement of water.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is the role of a cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from areas of high concentration to areas of low concentration.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a semi-permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a virus?

Back

A virus is a microscopic infectious agent that can only replicate inside the living cells of an organism.