ninth class biology mcqs (virus, bacteria and cyanobacteria)

Chapter 4 Virus, Bacteria and Cyanobacteria(As are the virus and bacteria enemies of your body so are the ignorance and senseless songs enemies of your soul)

Biology MCQs: 1 Dr. Sajid Ali Talpur

1. Bacteria are heterotrophes:a) true b) false

2. Viruses are:a) parasites b) obligate parasitesc) temperate parasites d) autotrophes

3. The word virus is derived from a Latin word viron which means:a) bad air b) vitalc) disease causing d) poison

4. All the microorganisms except bacteria and cyanobacteria are eukaryotes:a) true b) false

5. ______discovered tobacco mosaic virus (TMV):a) Iwanosky b) Stanelyc) Leuwenhoek d) Robert Hooke) N.O.T

6. Bacteria were discovered by:a) Iwanosky b) Stanelyc) Leuwenhoek d) Robert Hooke) N.O.T

7. Cyanobacteria were discovered by:a) Iwanosky b) Stanelyc) Leuwenhoek d) Robert Hooke) N.O.T

8. All viruses cause damage to their host:a) true b) false


Questions 9 - 22Select from the terms below:A) Virus B) BacteriaC) Cyanobacteria D) Both b & cE) N.O.T

9. They are prokaryotes

10. They are eukaryotes

11. They are neither prokaryotes nor eukaryotes

12. They are neither living nor non-living

13. The smallest of these is

14. The smallest organism is

15. The smallest eukaryote is

16. The possess cell wall

17. They contain chlorophyll

18. They are autotrophes

19. AIDS is caused by

20. Tuberculosis (T.B) is caused by

21. Hepatitis is caused by:

22. Dengue is caused by


23. Viruses are composed of:a) prokaryotic cellb) nucleic acid + phospholipidsc) phospholipid + proteinsd) neucleic acid + protein

24. Cell membrane is composed of:a) prokaryotic cellb) nucleic acid + phospholipidsc) phospholipid + proteinsd) neucleic acid + protein

25. 1nm =?a) 10-6m b) 106mc) 10-9m d) 109m

26. The complex viruses have 2000 genesa) true b) false

27. The average range size of virus is:a) 10-100nm b) 20-250nmc) 20mm d) 1-10mm

28. Bacteria are found every where on earth:a) true b) false

29. Virus can not live outside the non-living bodya) true b) false

30. Bacilli are round or spherical shaped bacteriaa) true b) false


31. Straight chain cocci are called staphylococci.a) true b) false

32. The autotrophic bacteria contain chloroplasta) true b) false

33. Nitrogen fixation in cyanobacteria occurs in heterocyst:a) true b) false

34. The protein subunits in the capsid of virus are called:a) capsule b) capsomeresc) genome d) capsers

35. Virus capsid contains:a) DNA b) RNAc) DNA & RNA d) DNA or RNA

Answer Key

1 B 2 B 3 D4 B 5 B 6 C7 E 8 B 9 D10 E 11 A 12 A13 A 14 B 15 E16 D 17 C 18 C19 A 20 B 21 A22 A 23 D 24 C25 C 26 B 27 B28 A 29 B 30 B31 B 32 B 33 A34 B 35 D


ninth class biology mcqs (virus, bacteria and cyanobacteria)

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