RB Macromolecules, Organelles, & Cell Transport Review

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a process by which molecules move across a cell membrane through protein channels, without the use of energy, from an area of higher concentration to an area of lower concentration.

Front

What role do proteins play in cell transport?

Back

Proteins help facilitate the movement of molecules across the cell membrane, either through channels in facilitated diffusion or as pumps in active transport.

Front

What is the primary element found in all organic compounds?

Back

Carbon is the primary element found in all organic compounds.

Front

What is endocytosis?

Back

Endocytosis is the process by which large molecules are brought into a cell by engulfing them in a vesicle.

Front

What type of molecules can easily pass through the phospholipid bilayer?

Back

Small, non-polar particles can easily move through the phospholipid bilayer.

Front

What is the function of the chloroplast?

Back

Chloroplasts are organelles found in plant cells that conduct photosynthesis, converting light energy into chemical energy.

Front

What is the structure of the phospholipid bilayer?

Back

The phospholipid bilayer consists of two layers of phospholipids, with hydrophilic (water-attracting) heads facing outward and hydrophobic (water-repelling) tails facing inward.

Front

What is the difference between osmosis and diffusion?

Back

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

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane against their concentration gradient, requiring energy (ATP).

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel large molecules or waste products by enclosing them in a vesicle that fuses with the cell membrane.