The Following Statement Describes What Level of Structure in a Protein

question 66

Multiple Choice

The following statement describes what level of structure in a protein? Several separate proteins link together to form an active enzyme.

• A)primary structure
• B)secondary structure
• C)tertiary structure
• D)quaternary structure
• E)none of the above

---

Definitions:

Concentration Gradient

The process of particles, which are sometimes called solutes, moving through a solution or gas from an area with a higher number of particles to an area with a lower number of particles.

Plasmolysis

A process in which cells lose water in a hypertonic solution, causing the cell membrane to detach from the cell wall, typically observed in plants.

Pinocytosis

Cell drinking; a type of endocytosis by which cells engulf and absorb droplets of liquids. Compare with phagocytosis and receptor-mediated endocytosis.

Net Water Movement

The overall transfer of water from one location to another, often across a membrane, driven by osmosis, filtration, or other forces.