Biology 9 Chapter 4 - Test 4


1. Viruses are of different sizes ranging from 0.01 to ________.


2. The inner core of virus is made up of _________.


3. The outer coat of virus is composed of ________.


4. In virus protein coat consists of two parts _____________ and tail.


5. Lecuwenhock discovered bacteria in ____________ for the first time.


6. Length of Bacteria ranges from 1Um to _________.


7. Bacteria are single celled _________ organism.


8. Bacteria cell is surrounded by a cell wall, which is composed of __________ and amino acids.


9. Generally the capsule is found in _________ bacteria.


10. Spiral shaped bacteria are called __________.


11. In addition to main bacterial DNA small circular molecules of DNA called __________ are also present in bacteria.


12. Plasmids play an important role in transmission of some ________ characteristics.


13. Non motile bacteria lack __________.


14. Cyano bacteria are also known as __________ algae.


15. Cyano bacteria always have a protective ___________ sheath around their cell wall.


16. Nastoc and ________ are common examples of cyano bacteria.





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