Bio common assessment 4

Front

What are the three main components of the cell theory?

Back

1. All living things are composed of cells. 2. The cell is the basic unit of life. 3. All cells arise from pre-existing cells.

Front

What is the statement that is NOT part of the cell theory?

Back

All living things come from non-living things.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is osmosis?

Back

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

Front

What is the function of vacuoles in a cell?

Back

Vacuoles store nutrients, water, ions, and waste materials.

Front

What type of microscope is used to view small specimens and produce a magnified image?

Back

Light microscope.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is the role of the cell membrane?

Back

The cell membrane regulates what enters and exits the cell, providing protection and support.

Front

What is the significance of the fluid mosaic model?

Back

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

Front

What are the main types of passive transport?

Back

The main types of passive transport are diffusion, facilitated diffusion, and osmosis.