Biology BSC 1005 SSC Ch. 4-5 Exam Questions with 100% Correct Answers.
During flu season, influenza virus infects many members of the population. During infection, the virus binds to the outside of a cell and tricks that cell into "eating" the virus. Once inside, the virus infects the cell and...
During flu season, influenza virus infects many members of the population. During infection, the virus
binds to the outside of a cell and tricks that cell into "eating" the virus. Once inside, the virus infects the
cell and forces the cell to make more viruses that can then go on to infect more cells. What type of cell
transport is the virus using to get into the cell? - CORRECT ANSWER Receptor-mediated endocytosis
Much like solar panels, chloroplasts in plants absorb the sun's rays and convert that energy into usable
food and energy for the cell. - CORRECT ANSWER True-A plant cell can contain from 20 to 100
chloroplasts for capturing the sun's energy and converting it to ATP, NADPH, and glucose.
Which type of transport does this image demonstrate? - CORRECT ANSWER Passive
Which of the following functions of living organisms can be carried out by viruses, and which require the
help of the host? - CORRECT ANSWER Host: reproduce, maintain internal homeostasis, Metabolize and
use Energy
Virus: Use nucleic acid (like DNA) as the genetic material
Some viruses, such as measles, bind to receptors on the cell and are then engulfed by the cell in a
vesicle. In this manner, the virus has hijacked the cellular process of phagocytosis as a mechanism to
enter the host cell. - CORRECT ANSWER False: Because the measles virus is binding to specific receptor
proteins, it is hijacking the cellular process of receptor-mediated endocytosis. If the virus were being
engulfed by a white blood cell of the immune system (without the specific receptor binding), it would be
undergoing phagocytosis.
1. Water diffuses from the inside of the cell to the outside of the cell because the concentration of salt
outside the cell is higher.
2. A transport vesicle inside the cell fuses with the plasma membrane and releases its contents to the
outside of the cell.
3. A vesicle containing liquid from outside the cell bulges inward, pinches off, and enters the cell. -
CORRECT ANSWER 1. Osmosis
2. Exocytosis
,3. Pinocytosis
Based on this information, consider what cellular machinery and which types of cells would be affected
if treated with the compound. Which of the following statements correctly predict what may happen in
this scenario and correctly explain why? - CORRECT ANSWER Animal cells would be affected because
they contain mitochondria.
Bacterial cells would not be affected because they are not eukaryotic.
Plant cells would be affected because they contain mitochondria.
What is the prominent, spherical, purple organelle shown here? - CORRECT ANSWER Nucleus
1. bacterium is engulfed by a macrophage.
2. LDL receptors bind and transport low-density lipoprotein (LDL) particles to the inside of the cell.
3. Cells lining blood vessels take in fluid-filled vesicles. - CORRECT ANSWER 1. Phagocytosis
2. Receptor-mediated endocytosis
3. Pinocytosis
As part of an experiment, you decide to add table sugar (sucrose) and table salt (NaCl) to a test tube
filled with liposomes in a solution of water. Which of the following molecules would you expect to find
on the inside of a liposome? - CORRECT ANSWER Water
The following image shows a white blood cell engulfing a yeast cell through phagocytosis, a nonspecific
form of which of the following? - CORRECT ANSWER Endocytosis
Acetic acid has the formula CH3COOH. At low pH this protonated, uncharged form is the most abundant
form in solution. As the pH increases, more of the molecule becomes negatively charged acetate:
CH3COO-. At which pH will more of the molecule cross the membrane? - CORRECT ANSWER 4
If the phospholipid layer were reversed and the fatty acid tails were on the outside of the cell
membrane, then the cells would be insoluble in water. - CORRECT ANSWER True: Because the
phosphate head groups are polar or hydrophilic, they help the cell survive in an aqueous environment.
, The main constituents of a cell's membrane bilayer are phospholipids. - CORRECT ANSWER True: Most
cell membranes have a phospholipid bilayer.
Which of the following cell structures deal with the synthesis and/or packaging of proteins as a primary
function? - CORRECT ANSWER rough ER
Golgi apparatus
ribosomes
Which of the following will most easily cross a plasma membrane? - CORRECT ANSWER H2O (water)
Indicate whether the organelles listed below are found in plant cells, animal cells, or both - CORRECT
ANSWER Animal: Lysosome
Plants: Cell Wall, large central vacuole, and Chloroplast
Vacuole - CORRECT ANSWER storage of water and other molecules
Prior to cell theory and germ theory, in the 1600s-1800s, some scientists supported the theory of
spontaneous generation. The theory proposed that living (cellular) organisms could form from inanimate
objects, or from other unrelated organisms. For example, it was thought that cheese or grain could
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