Exam 3: A: Anatomy of Cells

The Golgi apparatus helps to prepare material for export from the cell.

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

Primary cilia are unable to move because they lack the central pair of microtubules and motor molecules.

The nucleus is the only structure in the cell that contains DNA.

The plasma membrane can be described as a double layer of phospholipid molecules.

Ribosomes are only found attached to endoplasmic reticulum.

Integral membrane proteins play an important role in pinching off the cell membrane so two new cells can form during cell division.

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

Another name for the centrosome is the microtubule organizing center.

Cilia are longer and more numerous than flagella.

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

Schleiden and Schwann were the first scientists to see cells.

The inner folds of the mitochondria are called cisterna.

The functions of the nucleus are regulated by RNA.

The protein-processing units of the Golgi apparatus are called cisterna.

Centrosomes play an important role in cell division.

An organelle called a vault,composed of RNA and protein,functions to shuttle molecules to and from the nucleus.

One function of the smooth endoplasmic reticulum is to help maintain a low Ca⁺⁺ concentration in the cell's interior.

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

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