Exam 4: Organization of the Cell

You isolate a cellular structure and determine that it is composed of α -tubulin and β -tubulin. Based on this evidence, you correctly identify this structure as a(n):

For the following medical conditions, describe the likely cellular organelle or structure that has been affected in such a way as to cause the condition (note: There may be more than one organelle or structure involved): A. The sperm of a man cannot swim, thus rendering him infertile. B. A child experiences kidney failure due to Fabry's disease where the cells lining the inside of the kidney tubule accumulate abnormally large amounts of glycolipids that are usually degraded by enzymes. C. A person dies within minutes after ingesting cyanide because ATP is no longer being synthesized.

What cellular structure is unique to plant cells and some photosynthetic fungi?

The outer membrane of the nuclear envelope is continuous with the membrane of the ____ and is usually covered with attached ribosomes.

Which statements about centrioles is false ?

Peroxisomes are found in large numbers in cells that synthesize, store, and degrade lipids, and one of their functions is to break down protein molecules. __________________

What two organelles are both responsible for converting energy into forms that can be used by cells?

Proteasomes direct the destruction of defective DNA . __________________

The largest and most complex assembly of proteins in most eukaryotic cells are the:

The existence of a separate set of enzymes and DNA molecules in mitochondria and chloroplasts provide support for serial endosymbiosis. __________________

A bacterial pathogen has just entered the body of a person. Describe the sequence of events that lead to the production of enzymes that will hydrolytically destroy the bacterial cell, beginning with events in the nucleus and ending with destruction of the pathogen.

What is the primary function of mitochondria?

Intermediate filaments are most closely associated with which of the following?

Some cells are very large, seemingly in defiance of maintaining a large surface area to volume ratio. What are some strategies or adaptations that these cells may use in order to maintain a reasonable surface area to volume ratio?

The smooth ER is the primary site for the synthesis of proteins and cholesterol needed to make membranes. __________________

What does the nucleolus, within the nucleus, synthesize?

What protects a cell and may help keep other cells at a distance?

The force necessary to cause microtubules of cilia and flagella to slide alongside one another is provided through the action of ____ proteins, which derive the energy to perform their work directly from ____ molecules.

The accompanying image is the product which type of microscope?

Which organelle can be considered a sorting, processing and packaging center?