Bacteria, Archaea, And Viruses
22 Questions
| Total Attempts: 1892
Questions and Answers
- 1.Which systems are prokaryotic?
- A.
Archaea
- B.
Bacteria
- C.
Protista
- D.
Fungi
- E.
Plantae
- F.
Animalia
- 2.Reproduction is mostly _____ by means of binary fission
- A.
Asexual
- B.
Sexual
- 3.Small, circular DNA molecules are called plasmids
- A.
True
- B.
False
- 4.Which of the following may bacteria have?
- A.
Cell wall with unusual chemical properties
- B.
Slimy-coating capsule
- C.
Fimbriae: Hair like appendages
- 5.Kingdom Archaea-the archaebacteria has a unique RNA sequence and lacks muramic acid in their cell walls
- A.
True
- B.
False
- 6.Methane bacteria is:
- A.
Anaerobic
- B.
Aerobic
- 7.Salt bacteria can carry on a simple form of photosynthesis with the aid of a membrane-bound red pigment called bacterial rhodopsin
- A.
True
- B.
False
- 8.Kingdom Bacteria-the true bacteria contains muramic acid in the cell walls, and different RNA base sequences and lipids than archaebacteria
- A.
True
- B.
False
- 9.Call Bacteriae are mostly _____
- A.
Autotrophs
- B.
Heterotrophs
- 10.Cyanobateria have blue and red phycobilin pigments that are found in higher plants
- A.
True
- B.
False
- 11.Cyanobacteria produce oxygen when they photosynthesize
- A.
True
- B.
False
- 12.Only organisms that can fix nitrogen use atmospheric nitrogen and produce oxygen
- A.
True
- B.
False
- 13.Larger, colorless cells, nitrogen-fixing cells where fragmentation often takes place
- A.
Heterocysts
- B.
Akinetes
- 14.Thick-walled cells that can resist freezing and other adverse conditoins
- A.
Heterocysts
- B.
Akinetes
- 15.Viruses consist of a nuclei acid core (RNA or DNA) surrounded by a protein coat
- A.
True
- B.
False
- 16.Viruses reproduce themselves only by taking over host cells
- A.
True
- B.
False
- 17.Tail fibers that stick to receptors
- A.
Attachment
- B.
Pentration
- C.
Release
- D.
Biosynthesis
- E.
Maturation
- 18.Tail sheath injects DNA
- A.
Release
- B.
Biosynthesis
- C.
Penetration
- D.
Maturation
- E.
Attachment
- 19.Viral DNA takes over -Makes enzymes to break down host DNA, then uses the nucleosides for its own replication -Makes proteins for its own structure
- A.
Maturation
- B.
Release
- C.
Attachment
- D.
Biosynthesis
- E.
Penetration
- 20.Viral proteins assemble
- A.
Maturation
- B.
Attachment
- C.
Release
- D.
Biosynthesis
- E.
Penetration
- 21.Viral enzymes destroy the cell membrane and escape
- A.
Release
- B.
Attachment
- C.
Maturation
- D.
Biosynthesis
- E.
Penetration
- 22.Viroids are circular strands of RNA that invade the nuclei of infected plants
- A.
True
- B.
False
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