Exam 5: Cell Structure

What are molecular motors, and what is their function in the cell?

The "typical" or composite cell described in this chapter is very similar to most of the cells in the human body.

Cell fibers that are composed of twisted protein strands are microtubules.

An angstrom is larger than a nanometer.

In order for the Golgi apparatus to function correctly, both the ribosomes and the rough endoplasmic reticulum must be functioning also.

The inner folds of the mitochondria are called cisterna.

Match each cell structure with its corresponding description or function. -Broad, flattened sacs that extend from the nucleus and have ribosomes attached to them

Proteasomes only destroy abnormal or misfolded proteins in the cell.

Explain the structure and function of the microvilli.

A complete ribosome only exists when it is making a protein.

It is likely that a muscle cell would have more mitochondria than a fat cell.

Ribosomes are only found attached to endoplasmic reticulum.

In nondividing cells, DNA appears as threads that are referred to as:

The main function of the ribosome is to provide energy to the cell.

Heart muscle cells are joined by gap junctions to facilitate the movement of electrical impulses.

Which of the following is not a function of the smooth endoplasmic reticulum?

The nucleolus is composed chiefly of:

One of the main functions of the mitochondria is to supply the cell with ATP.

Match each term to the phrase that describes it best. -Microtubule organizing centers that also play a role in cell division

Centrosomes play an important role in cell division.