Chapter 4

What are the three principles of the cell theory?

Which cytoplasmic structures are common to both plant and animal cells, and which are found in one type but not the other?

What is a plasma membrane? What are its functions?

Describe the nucleus and the function of each of its components, including the nuclear envelope, chromatin, chromosomes, DNA, and the nucleolus.

Explain why mitochondria and chloroplasts have extensive membranous structures within them.

What is the function of ribosomes? Where in the cell are they found? Are they limited to eukaryotic cells?

Describe the structure and function of the endoplasmic reticulum (smooth and rough) and the Golgi apparatus and how they work together.

How are lysosomes formed? What is their function?

Describe the functions of vacuoles with suitable examples.

List the structures of bacterial cells that have the same name and function as some eukaryotic structures, but a different molecular composition.