Foundations of Bio Chapter 4

Cilia

shorter and often more numerous than flagella.

lipids, proteins, and carbs

the main components of biological membranes are

exocytosis

Cells can move substances from their cytoplasms into the external environment via

associated with motor proteins such as myosin.

Microfilaments can be involved in contractions that change the shape of a cell when they are

desosomes

Structures that contain networks of intermediate filaments and provide mechanical stability to animal tissues are called

Nucleoid

The DNA in a prokaryotic cell can be found in the region called the

invaginate

The cell membrane is said to _______ as it folds inward to form a pocket around materials in the environment during phagocytosis, pinocytosis, and receptor-mediated endocytosis.

hydrophobic

The fluid mosaic model proposes that _______ portions of integral membrane proteins are in contact with the tails of the phospholipid molecules.

The DNA in a prokaryotic cell is not separated from the ribosomes by a membrane.

What is a distinction between a prokaryotic cell and a eukaryotic cell?

Simple diffusion depends on specific carrier or channel proteins.

What statement about diffusion is false

concentration gradient

Which is the driving force for facilitated diffusion

the cell membrane undergoes a compostitional change

Which occurs during both endocytosis and exocytosis

where autophagy occurs

Which statement about lysosomes is true?

Its conformation will change when both an ion and a small molecule bind to it

Which statement would be true of a membrane-bound protein that works in conjunction with a sodium-potassium pump during secondary active transport?

integral and peripheral

_______ proteins are embedded in biological membranes, whereas _______ proteins are associated with surface regions of biological membranes.