1. Which one of the following statements about Mycoplasma is wrong?
A) They cause disease in plants
B) They are also called PPLO
C) They are pleomorphic
D) They are sensitive to penicillin
D) They are sensitive to penicillin
2. Pasteurization is performed at
A) 100°C for 15 minutes
B) 82°C for 30 minutes
C) 72°C for 20 minutes
D) 62.8° for 30 minutes
D) 62.8° for 30 minutes
3. Bacteria were regarded to be plants because
A) Some of them are green
B) They are present every where
C) Some of them cannot move
D) They have a rigid cell wall
D) They have a rigid cell wall
4. If a bacterium cell divides in every 20 minutes, how many bacteria will be formed in two hours?
A) 4
B) 16
C) 8
D) 64
D) 64
5. Which one of the following enzyme is present in the bacteriophage?
A) Protease
B) Lysozyme
C) Succinic dehydrogenase
D) Urease
B) Lysozyme
6. Aflatoxins are secreted by
A) Bacteria
B) Viruses
C) Fungi
D) Algae
C) Fungi
7. If a person shows the production of interferons in his body, chances are that he is suffering from
A) anthrax
B) malaria
C) measles
D) tetanus
C) measles
8. Which of the following statement is false?
A) TMV has double-stranded RNA molecule
B) Most plant viruses are RNA viruses
C) The bacteriophage has a double-stranded DNA molecule
D) Most animal viruses are DNA viruses
A) TMV has double-stranded RNA molecule
9. A bacterium is capable of withstanding extreme heat, dryness and toxic chemicals. This indicates that it is probably able to form
A) a thick peptidoglycan wall
B) endospores
C) endotoxins
D) endogenous buds
B) endospores
10. HIV is a member of a group of viruses called
A) Bacteriophages
B) Geminiviruses
C) Lysogenic viruses p
D) retroviruses
D) retroviruses
11. Widal test is used for the diagnosis of:
A) Malaria
B) Pneumonia
C) Tuberculosis
D) Typhoid
D) Typhoid
12. Infectious proteins are present in:
A) Gemini viruses
B) Prions
C) Viroids
D) Satellite viruses
B) Prions
13. Triple vaccine prevents ____________
A) Diphtheria
B) Whooping Cough
C) Tetanus
D) All of the above
D) All of the above
14. Nucleic acid having 5- methyl uracil is the genetic material in
A) HIV
B) TMV
C) Reovirus
D) CMV
D) CMV
15. Foot and mouth disease of cattle disease is caused by?
A) protozoan
B) virus
C) bacteria
D) fungus
B) virus
16. The enzyme used in cheese production is
A) Cellulase
B) Rennet
C) Lipase
D) Casien
B) Rennet
17. The genetic material of M13 bacteriophage is
A) ss-RNA
B) ds-RNA
C) ss-DNA
D) ds-DNA
C) ss-DNA
18. Which of the following is the smallest virus
A) T2 Bacteriophage
B) f2 Bacteriophage
C) T.M.V.
D) Lambda phage
B) f2 Bacteriophage
19. Which one of the following is not a biofertilizer?
A) Mycorrhiza
B) Agrobacterium
C) Rhizobium
D) Nostoc
B) Agrobacterium
20. Which of the following is a viral disease?
A) Cold
B) Cholera
C) Malaria
D) Tuberculosis
A) Cold
21. Tuberculosis is caused by _________
A) Bacteria
B) Virus
C) Fungus
D) Algae
A) Bacteria
22. Which of the following processes results in the formation of a clone of bacteria
A) Conjugation
B) Transformation
C) Transduction
D) Binary fission
D) Binary fission
23. In TMV, capsomers are arranged in ___
A) Helical manner
B) Cubic manner
C) Hexagonal manner
D) More than one option is correct
A) Helical manner
24. Which of the following is an Insectborn disease?
A) Cold
B) Cholera
C) Malaria
D) Tuberculosis
C) Malaria
25. Which of the following is a respiratory tract disease?
A) Bronchitis
B) Cholera
C) Tuberculosis
D) Bronchitis & Tuberculosis
D) Bronchitis & Tuberculosis
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