Karena seringnya kesulitan menghafalkan dan ternyata sering pula ditanyakan pada Test ke universitas .....maka ini ada bacaan yang tersatukan tidak tercerai berai tentang species Bakteri dan Virus untuk memudahkan mengaplikasikan ke soal soalnya ... silahkan di copy saja kalau mau dipakai hehehe semoga bermanfaat
LATIHAN
1. Viruses are simple, acellular, infectious agents
A.True
B.False
2.Viruses can reproduce independently from the host cell
A.True
B.False
3. Viruses are composed of
A. DNA
B. RNA
C. Either DNA or RNA
D.Both DNA and RNA
4. Localized areas of cellular destruction and lysis caused by virus infection are called __________
A.plaques
B.spikes
C.holes
5. Viruses may harm their host cells by ____________
A.inhibiting DNA synthesis
B.inhibiting protein synthesis
C.altering plasma membranes
D.forming inclusion bodies
E.any of the above
6. The first step in the animal virus cycle is __________
A.uncoating
B.penetration of the host cell
C.adsorption to the host cell surface
7. Which of the following is true about the G + C content of organisms?
A.G + C content of organisms is easily determined
B.G + C content is taxonomically valuable
C.G + C content indirectly reflects the base sequence of the organism
D.All of these are true about the G + C content of organisms.
8. Archaea differ from other bacterial groups in that they have special structural, chemical and metabolic adaptations that enable them to grow in extreme environments
A.True
B.False
9. Archaea usually grow in a few restricted or specialized habitats, such as
A.anaerobic
B.hypersaline
C.extremely hot
D.exremely cold
E.all of these
10. The deinococci are gram-positive cocci and rods that are distinctive in their unusually great resistance to ____________
A.radiation
B.desiccation
C.radiation and desiccation
D.extreme temperatures
11. Which of the following is not a group of photosynthetic bacteria?
A.The green bacteria
B.the purple bacteria
C.the cyanobacteria
D.All of these are groups of photosynthetic bacteria
12. The spirochetes include the causative agents for _______
A.syphilis
B.Lyme disease
C.both syphilis and Lyme disease.
D.neither syphilis nor Lyme disease.
13. Proteobacteria are gram-negative bacteria of considerable importance as ________
A.disease agents
B.nitrogen fixers
C.major experimental organisms
D.all of these
14. Which of the following genera grow symbiotically within root nodules of legumes as nitrogen-fixing bacteroids?
A.Agrobacterium
B.Rhizobium
C.Pseudomonas
D.Bacteroides
15. Helicobacter pylori is responsible for ________
A.gastroenteritis.
B.cholera.
C.bacterial dysentery.
D.peptic ulcer disease.
16. The causative agent for cholera in humans is a member of the genus __________
A.Escherichia
B.Vibrio
C.Enterobacter
D.Shigella
17. Actinomycetes are usually found in __________ habitats
A.soil
B.freshwater
C.marine
D.all of these.
18. Actinomycetes are the primary source of antibiotics we use in medicine
A.True
B.False
19. Pseudomonads are a large group of bacteria which can _________
A.spoil refrigerated food
B.cause disease
C.photosynthesize
D.a and b
E.a and c
20. Most gram-positive bacteria are harmless free-living saprophytes
A.True
B.False