1. A virus mutates, and therefore it has which of the following traits of living things?
A. It evolves.
B. It uses energy.
C. It is made of cells.
D. It grows and develops.
2. Compare a virus to a unicellular organism.
A. Viruses reproduce through asexual reproduction; unicellular organisms need a host cell.
B. Viruses need energy; unicellular organisms do not need energy.
C. Unicellular organisms have a cell membrane made from a lipid bilayer; viruses have a protein coat.
D. Neither unicellular organisms nor viruses respond to stimuli.
3. Summarize the lytic cycle
A. A virus copies its genetic material and then splits its cell membranes in half to form identical viruses.
B. The viral DNA incorporates itself with the host cell’s and replicates whenever the host cell replicates itself.
C. A virus lays eggs on the host cell’s protein coat, which then hatch and move on to infect other cells.
D. A virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.
4. Differentiate between the lysogenic and lytic cycles.
A. The virus injects DNA into the host cell during the lysogenic cycle.
B. The host cell copies its own DNA during the lytic cycle.
C. The host cell is destroyed during the lytic cycle.
D. Viral proteins are synthesized during the lysogenic cycle.
5. Why do doctors recommend people get the flu vaccine every year rather than every few years?
A. They should get the flu vaccine because viruses do not mutate.
B. They should get the flu vaccine because their bodies already have a resistance.
C. They should get the flu vaccine because viruses mutate.
D. They should get the flu vaccine because their bodies do not build up resistance.
plese answer all
1. A. It evolves.
2. A. Viruses reproduce through asexual reproduction; unicellular organisms need a host cell.
3. D. A virus injects its genetic material into the host cell, copies itself, and then forms new viruses that burst out of the host cell.
4. A. The virus injects DNA into the host cell during the lysogenic cycle.
5. C. They should get the flu vaccine because viruses mutate.