AP Biology Unit 2 Test

What is the difference between osmosis and diffusion?

• Osmosis is the movement of solutes from high to low concentration, while diffusion is the diffusion of water across a membrane.

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

• Osmosis and diffusion are the same processes and can be used interchangeably.

• Osmosis occurs in gases, while diffusion occurs in liquids.

What is an integral protein?

• Proteins that are loosely attached to the membrane surface

• Proteins that are permanently attached to the biological membrane and can span across the membrane

• Proteins that are only found in the cytoplasm

• Proteins that are involved in DNA replication

What is the role of aquaporins in cells?

• Aquaporins serve as water channel proteins that allow for the rapid transport of water across cell membranes.

• Aquaporins are enzymes that catalyze the breakdown of glucose in cells.

• Aquaporins are structural proteins that provide support to the cell membrane.

• Aquaporins are receptors that bind to hormones and trigger cellular responses.

What are the main components of the cell membrane?

• Phospholipids, proteins, cholesterol, and carbohydrates

• Nucleic acids, ribosomes, and enzymes

• Cellulose, lignin, and pectin

• Water, salts, and minerals

Tags

NGSS.MS-LS1-2

Explain the concept of selective permeability in cell membranes.

• Selective permeability refers to the ability of a cell membrane to allow certain substances to pass while blocking others, maintaining homeostasis.

• Selective permeability is the process by which all substances can freely pass through the cell membrane without restriction.

• Selective permeability means that the cell membrane is impermeable to all substances, preventing any movement in or out.

• Selective permeability refers to the ability of a cell membrane to allow only water to pass while blocking all other substances.

Tags

NGSS.HS-LS1-3

What is the function of the Golgi apparatus?

• It synthesizes ribosomes for protein production.

• It modifies, sorts, and packages proteins and lipids for secretion or delivery to other organelles.

• It generates ATP through cellular respiration.

• It stores genetic information in the form of DNA.

Which type of molecules can easily pass through the cell membrane?

• Large polar molecules

• Small nonpolar molecules

• Ions and charged molecules

• Complex carbohydrates

What is the primary function of aquaporins?

• Facilitate the transport of water across cell membranes.

• Transport ions across cell membranes.

• Act as receptors for signaling molecules.

• Provide structural support to the cell membrane.

What is endocytosis?

• Endocytosis is the process by which cells internalize substances from their external environment by engulfing them in a vesicle.

• Endocytosis is the method by which cells expel waste materials into their external environment.

• Endocytosis refers to the process of cell division and replication.

• Endocytosis is the mechanism by which cells convert glucose into energy.

What is the difference between exocytosis and endocytosis?

• Exocytosis is the process of taking substances into the cell, while endocytosis is the process of vesicles fusing with the plasma membrane to release their contents outside the cell.

• Exocytosis is the process of vesicles fusing with the plasma membrane to release their contents outside the cell, while endocytosis is the process of taking substances into the cell.

• Exocytosis and endocytosis are both processes that release substances outside the cell.

• Exocytosis is a type of endocytosis that occurs in plant cells only.