Exam 5: Cells: the Working Units of Life

The membrane surrounding each organelle

A mass of cells is found in the sediment surrounding a thermal vent in the ocean floor. The salinity in the area is quite high. Microscopic examination of the cells reveals no evidence of membrane-enclosed organelles. This cell would be classified as a

Chromatin is a series of entangled threads composed of

Cells that synthesize a large amount of protein, such as _______ cells, are packed with rough endoplasmic reticulum.

Which one of the following organelles is thought to have arisen from an endosymbiotic relationship with a prokaryote?

Specialized cellular appendages of prokaryotes that help bacteria adhere to one another when they exchange genetic material are called

Microscopes are used to resolve images that cannot be seen with the unaided eye. Electron microscopes use _______ to resolve images, whereas light microscopes use _______ to resolve images.

The Golgi apparatus

The packaging of proteins to be used outside the cell occurs in the

Steroids, fatty acids, and phospholipids are synthesized in the _______.

Which of the following is not a characteristic of a prokaryotic cell?

A specialized structure found in some prokaryotes is the

The folds of the inner mitochondrial membrane

The three principle tenets of biology-that all organisms are composed of cells, that all cells come from preexisting cells, and that cells are the fundamental units of life-make up the unifying principle known as the _______.

Archaea and Bacteria do not typically have membrane-enclosed internal compartments; therefore, they are known as _______.

The organelle with many folds, called cristae, is the _______.

The fundamental unit of life is the _______.

A large organelle found in eukaryotic cells that genetically controls the cell's activities is the

The carotenoid pigments that give ripe tomatoes their red color are contained in organelles called

The cellular structures that are almost identical to centrioles are the