Exam 2: Cells: the Living Units

Ribosomes consist of two subunits, each surrounded by a membrane.

This is the mechanism by which large particles and macromolecules enter a cell.

Identify the two different types of membrane-associated molecules that comprise the glycocalyx.

Transcription of DNA requires the presence of

Peroxisomes function to

The smooth ER contains its own molecules of DNA.

Dyneins and kinesins are motor proteins that

Membrane-bound organelles have the same type of membrane as the plasma membrane except

The theory proposing that aging results from the effects of free radicals is the

The plasma membrane is important for all the following reasons except

Which of the following does not pass through nuclear pores?

Materials that are to be exocytosed by cells are enclosed in vesicles synthesized by the

Which of these organelles is involved in production of cellular energy?

This is the type of protein involved in transport mechanisms across the plasma membrane.

Which organelle produces ATP molecules?

Use the diagram above to answer the following questions. -Which letter indicates the plasma membrane?

The plasma membrane is

Microtubules are composed of actin.

Of the following, the only organelle that has a double membrane structure is the

During anaphase, motor proteins attached to mitotic spindle fibers serve to