Exam 3: Cell Structures and Their Functions

The process of assembling proteins using the mRNA code is called

Which cell extension is a long whip-like structure?

Secondary active transport requires ATP to move the second substance across the membrane.

The diffusion of water across a selectively permeable membrane is called

A transport protein can generally transport many different types of substances.

The inner membrane folds in mitochondria are called

Once an equilibrium is established from a concentration gradient, there is not more movement of molecules.

Differentiation of cells results from different genes being activated or deactivated.

The chromosomes and associated proteins are in the form known as _____ when the cell is not dividing.

In a solution of sugar and water, which of the following is true?

Generally free ribosomes make proteins that will be secreted from the cell.

Integrins act in both attachment and cellular communication.

Which of the following will NOT pass through a plasma membrane by diffusion?

The tendency for ions and molecules to move from an area of higher concentration to an area of lower concentrations is

All the triplets necessary to make a functional RNA or protein is called a/an

The hydrophobic end of a phospholipid faces the inside of the bilayer.

The plasma membrane allows some materials to pass through it but not others. This property make the plasma membrane

The series of membranous sacs and channels throughout the cytoplasm are called

A polyribosome makes several identical proteins from the same mRNA.

What occurs in posttranscriptional processing?