chapter 4 bioligy

Which feature is found in all cells?

plasma membrane composed of phospholipids

Which of the following is a function of the nucleus?

acts as the control center of the cell

Which is the most common type of intercellular junction between cells of the bladder?

adhesion junctions

Without gap junctions in certain tissues,

cells would not be able to communicate with each other.

All cells have some characteristics in common; both prokaryotic and eukaryotic cells have

cytoplasm, a plasma membrane, and DNA.

Chromosomes are made from

condensed chromatin.

The stack of thylakoids labeled "A" in this figure is called

granum

Which of the following is a correct match of a molecule and the location where it is principally used?

mRNA - nucleus and cytoplasm

The cell walls of bacterial cells and plant cells function in

maintaining cell shape.

A cell that cannot produce enough energy to function properly most likely has a problem with its

mitochondria.

Which of the following is a correct matching of an organelle and its function?

mitochondrion - cellular respiration

Which of the following is a possible function of the extracellular matrix in animal cells?

All of the answers are possible functions of the extracellular matrix.

Which of the following statements describes the function of a chloroplast?

It converts light energy into chemical energy.

Carrie would like to observe the cilia on the surface of a live paramecium—a single-celled organism. The best device to do this would be a(n)

Light microscope

A cell being observed under a microscope has a cell wall, plasma membrane, ribosomes, and chromosomal material that is not found in a nucleus. Based on this information, the cell could be a

bacterial cell.

Receptor proteins

bind to a signal molecule and bring about a cellular response.

Receptor proteins allow a cell to

bind to signal proteins from other parts of the body.

Surface-to-volume ratio is an important characteristic for cell function; some cells increase their ratio by

developing finger-like projections.

A prokaryotic cell

does not have a membrane-bound nucleus.

The glycoproteins found in the plasma membrane function in what capacity?

establishing the identity of the cell

Since the plasma membrane blocks the passage of all but a few molecules with specific traits, it is necessary for other molecules to

pass through the membrane via proteins.

What must materials pass through to enter or leave a cell?

plasma membrane

Cell size is limited because ________ is critical to a cell's function.

surface-area-to-volume ratio

What function does the nucleolus have?

synthesizes ribosomal RNA

Which of the following allows eukaryotic cells and their organelles to move?

the cytoskeleton