Exam 5: Cell Structure

Which of the following is not true about ribosomes?

Main cell structures include all of the following except:

The size of a cell's nucleolus is indirectly related to the amount of protein the cell produces.

Skin cells (epithelial) are held tightly together by:

Which of the following is a functional characteristic of ribosomes?

Lysosomes can be called the "garbage disposals" of the cell.

One function of the microvilli is to increase the surface area of a membrane to provide for more efficient absorption.

Centrioles are made up of cylinders of nine bundles of microtubules with three tubules in each bundle.

Which of the following does not describe a structure or function of the proteasome?

Match each term to the phrase that describes it best. -Cell extensions that lack the center pair of microtubules and can function as sensory organelles; not found in blood cells, but most other cells have them

Cilia are longer and more numerous than flagella.

The major function of ribosomes is to synthesize:

Small proteins called ubiquitins assist the proteasomes in accomplishing their function.

Match each term to the phrase that describes it best. -Cell extension that increases surface area for more efficient absorption

The longest extension of a nerve cell can be over a meter in length.

Three ribosomal subunits must come together to form a functioning ribosome.

Explain the functions of the cell membrane.

Match each term to the phrase that describes it best. -Cell connections that form tunnels between cells and are found in heart muscles

Peroxisomes contain enzymes that detoxify harmful substances.

An important function of the cell membrane is the maintenance of cell integrity.