____ 1. All of the following are part of a prokaryotic cell except
b. a cell wall.
c. a plasma membrane.
e. an endoplasmic reticulum.
____ 2. Which of the following is a major cause of the size limits for certain types of cells?
a. the evolution of larger cells after the evolution of smaller cells
b. the difference in plasma membranes between prokaryotes and eukaryotes
c. the evolution of eukaryotes after the evolution of prokaryotes
d. the need for a surface area of sufficient area to allow the cell's function
e. the observation that longer cells usually have greater cell volume
____ 3. Tay-Sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very
large and complex lipids. Which cellular organelle must be involved in this condition?
a. the endoplasmic reticulum
b. the Golgi apparatus
c. the lysosome
e. membrane-bound ribosomes
____ 4. The liver is involved in detoxification of many poisonsand drugs. Which of the following structures is primarily involved in
this process and therefore abundant in liver cells?
a. rough ER
b. smooth ER
c. Golgi apparatus
d. Nuclear envelope
e. Transport vesicles
____ 5. Organisms must constantly bring in certain molecules and ions while keeping others out. This function is accomplished by
a. the nucleus
d. the plasma membrane
e. the Golgi complex
____ 6. Certain organisms such as the striped bass (Morone saxatilis) are able to migrate between the ocean and freshwater
streams. Consider when the striped bass migrates into freshwater streams; which one of the following situations would be
necessary to maintain life?
a. Ions must be kept within the cells while water is kept out.
b. Water must be kept within the cells while ions are kept out.
c. It is not possible for a living organism to survive in both the ocean and freshwater streams.
d. The plasma membrane of the organism must change its phospholipid composition.
e. The plasma membrane of the organism must change its protein composition.
____ 7. The major structural components of a cell membrane are ____.
a. phospholipids and cellulose
b. phospholipids, protein, and sterols
c. protein and sterols
d. glycolipids and proteins
e. phospholipids and glycolipids
____ 8. In an aqueous environment, the phospholipids of a membrane ____.
a. are arranged in a single layer
b. are arranged in a bilayer with the polar heads of each layer located at the surface
c. are arranged in a bilayer with the fatty acid tails located at the surface
d. are arranged in a bilayer but the phospholipids have no specific orientation
e. dissolve ____ 9. When referring to membrane glycolipids and glycoproteins, the term "glyco-" indicates ____.
a. nonpolar carbohydrate groups are attached to the molecules
b. polar carbohydrate groups are attached to the molecules
c. the molecules are found on both the interior and exterior of the membrane
d. the molecules are attached to the membrane by ionic bonds
e. the molecules are rarely found on the membrane exterior
____ 10. The selective permeability of a membrane refers to ____.
a. the movement of a molecule from an area of greater concentration to an area of lesser concentration.
b. the ability of a substance to pass through a membrane
c. the ability of only certain molecules to pass across a membrane
d. the need for carrier proteins to transport some molecules
e. the ability of molecules to be transported across the membrane only certain times of the day
____ 11. When a drop of food coloring is placed in a container of clear water, the colored dye molecules ____.
a. undergo osmosis to a different location
b. undergo active transport to a different location
c. diffuse to the top of the container
d. diffuse equally through out the container
e. stay at the bottom of the container
____ 12. Transport of a molecule across a cell membrane by facilitated diffusion ____.
a. exhibits specificity for a particular type of molecule
b. requires the input of energy
c. depends on a concentration gradient
d. goes against the concentration gradient
e. more than one answer is correct
____ 13. When a plant cell is placed in a hypotonic solution, the cell wall prevents ____.
c. active transport
d. the cell from bursting
e. the cell from shrinking
____ 14. In plants, wilting of leaves and stems results from ____.
b. an increase in turgor pressure
d. a lack of solutes in the cell
e. a higher than normal concentration of water in the cell
____ 15. ____ is the net movement of uncharged molecules from a low concentration to a higher concentration.
a. Active transport
b. Facilitated diffusion
____ 16. The ____ is responsible for maintaining the membrane potential across the cell membrane.
a. H pump
b. Na /K pump
c. diffusion gradient
d. Ca pump
e. osmotic ratio
____ 17. Mitosis results in ____.
a. growth of an organism
b. wound healing
c. gamete formation
d. replacement of old tissue
e. all but one of these answers ____ 18. The duplication of the complete set of chromosomes in an organism's cell, followed by the separation of the duplicated
chromosomes into two new cells is known as ____.
a. mitotic cell division
b. zygote formation
c. binary fission
d. meiotic cell division
____ 19. Once human nerve cells become mature, they normally exit the cell cycle and remain in ____.
d. S phase
____ 20. Each of two daughter cells that result from the normal mitotic division of the original parent cell contains ____.
a. the same number of chrom