Name ____Answer Key_______________
The Cell Organelle Worksheet
The Nucleus is called the ___brain_____ of the cell. It ____directs___________ all cell
activity. The nuclear membrane has many __pores__. The large solid spot inside the nucleus
is the ___nucleolus_______________ which is a spot of __dense____ chromatin. It
manufactures __ribosomes__. It stores the information needed for the manufacture of
__proteins___.
The Cell Membrane performs a number of critical functions for the cell. It regulates all that
__enters__ and leaves the cell. Phospholipids or PROTEINS scattered across the surface of the
membrane act as the doorways into and out of the cell.
Endoplasmic Reticulum (ER) is a series of double membranes that _transport substances__
back and forth between the cell membrane and the _Golgi Body__, providing a ___pathway__
between the nucleus and the cytoplasm. The rough E.R. has __ribosomes__ attached to it
which manufacture __proteins__ for the cell. The ribosomes are the __organelles__ which
manufacture proteins.
Smooth E.R. __lacking__ ribosomes. It acts as a __highway___ throughout the cytoplasm. It
runs from the cell membrane to the nuclear __membrane__ and throughout the rest of the cell.
The Golgi Body is responsible for packaging __proteins and carbohydrates__ for the cell.
Mitochondria are the _power house__ of the cell. It is the site of _cellular respiration_____.
It has a __double__ membrane. The inner membrane is where most __cellular___ respiration
occurs. Mitochondria have their own __DNA__ and manufacture some of their own
__proteins__.
Lysosomes are called __garbage_ sacks. They are produced by the ___Golgi__ body. The
lumpy brown structures are digestive __enzymes_. They help protect you by ___digesting__
the bacteria that your white blood cells engulf.
Chloroplasts are the site of ___photosynthesis_. Chloroplasts are one of three types of
__organelles_, which are plant cell organelles that are involved in energy storage. Plant cells
are remarkable in that they have two ways of generating energy; _photosynthesis in
chloroplasts and _cellular respiration__ in mitochondria.
The Cell Wall is found only in __plant cells_. The cell wall protects the cellular contents; it
gives _support_ to the plant structure.The primary chemical component of cell walls is
_cellulose__, which is made up of several thousand glucose molecules linked end to end.
The Cytoskeleton gives _support___ and _structure__ to a cell. It has filaments composed of
linear polymers of tubulin, which are globular proteins, and can increase or decease in length by
