The Cell – Unit Assessment 4
Diseases caused by eukaryotic parasites are much harder to treat than bacterial infections. What is the reason?
- Their cells are larger than bacterial cells.
- They don’t have ribosomes
- Their cells are structurally similar to human cells.
- They do not divide
Given that a cell’s structure reflects its function, which of the following functions do you think is characteristic of a cell with a large endoplasmic reticulum and Golgi apparatus?
- Fat storage
- Rapid replication of genetic material
- Secretion of antibodies
A scientist is studying a single celled eukaryote and the bacteria that live inside it. What organelles will she observe in BOTH organisms?
- endoplasmic reticulum
- Both A and B are correct
While using a microscope to examine the cell of an unknown organism, you see that the cell has a nucleus, a cell wall, ribosomes and mitochondria. What kind of organism do you think this cell belongs to?
- This is most likely a plant cell
- This is most likely a bacterium
- There is not enough information here to determine what kind of cell this is.
- This is most likely an animal cell
Which one of the following biomolecules is least likely to be a component of a cell membrane?
- Nucleic acids
If a cell is placed in a hypotonic solution such as pure water, what is likely to happen?
- The cell will remain at equilibrium and will not change in volume.
- The cell will swell and may burst.
- The cell will shrink.
If a cell is placed in a very salty or sugary solution, it is likely to shrink. Why is this likely to happen?
- will shrink because water will flow down its concentration gradient, out of the cell.
- will shrink because salt ions or sugars will damage the cell membrane, causing it to leak.
- will shrink because ions and other particles will move out of the cell.
What is the role of cholesterol in the membrane?
- transport materials across the membrane
- cellular identification
- help maintain fluidity
Transport proteins must be peripheral proteins.
A set of erythrocytes is placed in a beaker of 9% NaCl. The internal solute concentration of erythrocytes is 0.9%. What will happen to the cells?
- They will shrivel.
- They will swell and burst.
- They will synthesize water.
- They will intake potassium ions to balance the outside sodium ions.
Consider the following animal cells: antibody producing white blood cells, hormone-producing cells, and intestinal cells producing digestive enzymes. Which organelles would not be abundant in them?
- Rough endoplasmic reticulum
- Golgi apparatus
What is the most basic unit of structure and function in living organisms?
- the atom
- the cell
- the nucleus
- the plasma membrane