Microorganisms Unit Test: Question Preview (ID: 23410)


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A group of biology students wanted to know more about the growth of algae in local ponds. They studied algae living in a sunny pond and algae living in a shady pond. How will the rate of cell division MOST LIKELY differ between the algae?
a) The algae in the sunny pond will have a faster rate of cell division because they receive more sunlight. b) The algae in the shady pond will have a slower rate of cell division because cold water inhibits their growth. c) The algae in the shady pond will have a faster rate of cell division because they are protected from direct sunlight. d) The algae in the sunny pond will have a slower rate of cell division because the higher water temperature causes mutations.
Which sentence BEST explains a virus's means of replication?
a) The virus attaches to a living host cell and begins to control the cell, thereby replicating more specimens. b) The virus attaches to a nonliving host cell and begins to use the cellular material to replicate. c) The virus attaches to a nonliving host cell and begins to self-reproduce until a living cell is available. d) The virus attaches to a living host cell and begins to reproduce with the cell, thereby producing hybrid cells.
Edward Jenner created the first vaccine in 1796. Which statement explains what Jenner was trying to accomplish?
a) He wanted to relieve the public from the small pox epidemic. b) He wanted to develop an end to all bacterial infections. c) He wanted to ensure that dairy products were pasteurized. d) He wanted to provide the public with a healthier form of meat.
Yellow-green algae and golden-brown algae belong to the phylum Chrysophyta, which means golden plants. Which structure provides the plants with the bright yellow pigments that give this phylum its name?
a) Chloroplast b) Gullet c) Pellicle d) Nucleus
How do immunizations help fight the polio epidemic?
a) They provide the body with a deadly antigen that allows the body to produce high concentrations of T-killer cells. b) They provide the body with a safe antigen that allows the body to then prepare antibodies if it is ever exposed to the real v c) They provide the body with a compliment protein that enables the body to recognize and destroy all viruses. d) They provide the body with a boost of white blood cells that the body can increase in number during an infection.
HIV causes AIDS by
a) converting a proto-oncogene to an oncogene. b) damaging a person’s blood vessels. c) destroying the covering of a person’s nerves. d) gradually destroying a person’s immune system.
Animal digestive systems do not function appropriately without the aid of other organisms. In which kingdom do these organisms belong?
a) Bacteria b) Fungi c) Protistans d) Plantae
Animal viruses often infect only specific host cells because
a) the virus must have the same DNA as the host cell. b) the host cell must have specific receptors for proteins on the virus surface. c) viruses have receptors for host cell glycoproteins. d) the enzymes of the virus can attach only to specific host cells.
The earliest known group of living organisms on Earth was
a) Protist b) Bacteria c) Humans d) Flagella
Why can the use of antibiotics to fight minor illness become a serious problem?
a) Bacteria adapt and become immune to the antibiotics. b) Viruses can use the antibiotics to increase their replication. c) Bacteria can use the antibiotics against the host. d) Viruses adapt and change to make antibiotics ineffective.
When tested with a Gram stain, Gram-positive bacteria are stained
a) Purple b) Green c) Yellow d) Red
The study of viruses is a part of biology because
a) they belong to the kingdom Eubacteria. b) they are about to become extinct. c) they are living organisms. d) they are active inside living cells.
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