Diversity of life | Monera | prokaryota | Self evaluation test

1. Which of the following represents obligate anaerobes

[CPMT 1991]

(a)   Spirogyra                               (b)   Pisum sativum

(c)   Onion                                     (d)   Methane bacteria

2. Which of the following is a photo–autotrophic bacterium

(a)   Rhodospirillum                    (b)   Azospirillum

(c)   Nitrosomonas                       (d)   Nitrobacter

3. Rhizosphere bacteria are present around the

(a)   Leaf surface                          (b)   Root surface

(c)   Floral surface                       (d)   None of the above

4. The bacteria which lacks flagella and moves by gliding are included in                                                           [MP PMT 1992]

(a)   Spirochaetes                        (b)   Rickettsia

(c)   Myxobacteria                       (d)   Eubacteria

5. Gram +ve bacteria have

(a)   Thick and homogeneous cell walls

(b)   As much as 70% peptide molecules

(c)   Either no lipids or less than 10% lipids

(d)   All the above

6. Paracoccus is

(a)   Aerobic bacteria

(b)   Anaerobic bacteria

(c)   Both (a) and (b)

(d)   None of the above

7. Exotoxin is produced by

(a)   Gram positive bacteria

(b)   Gram negative bacteria

(c)   Both (a) and (b)

(d)   None of the above

8. Which group of bacteria is known as ‘ray fungi’

(a)   Mycobacteria                        (b)   Mycoplasma

(c)   Actinomycetes                      (d)   Myxobacteria

9. The murein found in bacterial cell is [CPMT 1998]

(a)   Derivative of protein

(b)   Derivative of fat

(c)   Derivative of organic acids

(d)   Derivative of sugars

10. Koch’s postulates are not applicable to [CBSE PMT 1999]

(a)   T. B.                                         (b)   Leprosy

(c)   Cholera                                  (d)   Diphtheria

11. The purple sulphur bacteria use hydrogen sulphide and release sulphur but not oxygen. Which of the following agrees with above observation          [AIEEE 2002]

(a)   The  that reduces  comes from  that liberates sulphur

(b)   Photosynthesis does not require chlorophyll

(c)   Photosynthesis consist of a light and a dark reaction

(d)   The  which reduces  in photosynthesis comes from  that releases

12. Why bacteria do not survive in the salt pickle which has high salt contents [MP PMT 1990; KCET 2000]

(a)   Salt retards the rate of reproduction of bacteria

(b)   Bacteria do not get light for photosynthesis

(c)   Due to plasmolysis bacteria die

(d)   Essential elements for bacterial viability are not present in the pickle

13. For reproduction, ‘endospores’ are formed in the following genera [BHU 1994; KCET 1999; Pb. PMT 2000]

(a)   Bacillus and Clostridium  

(b)   Mucor and Bacillus

(c)   Monococcus and Clostridium

(d)   Saccharomyces and Clostridium

14. Salmonellosis is the process of

(a)   Reproduction by bacteria

(b)   Food poisoning by bacteria

(c)   Sanitation by bacteria

(d)   Decomposition by bacteria

15. Which bacterium causes cotton destruction

(a)   Clostridium botulinum       (b)   Spirochaeta cytophoga

(c)   Mycobacterium                    (d)   Vibrio

16. Bacteroids are [BHU 1991]

(a)   Enlarged non-mobile cellular bacteria Rhizobium leguminosarum in root nodules of legumes

(b)   A bacterial cell infected with viruses

(c)   A mobile bacterium

(d)   Nitrosomonas bacteria in soil

17. Activity of nitrogenase in nitrogen fixing micro-organisms can be seen when                                                           [BHU 1994]

(a)   Methane is converted to ethane

(b)   Ethane is converted to methane

(c)   Ethylene is converted to acetylene

(d)   Acetylene is converted or reduced to ethylene

18. Azatobactor and Polymyxa are example of

[CBSE PMT 1996]

(a)   Symbiotic nitrogen fixation

(b)   Non-symbiotic nitrogen fixation

(c)   Disease causing bacteria

(d)   Ammonifying bacteria

19. Match the types of bacteria listed in column I with their activity given in column II. Choose the correct combination of alphabets of the two columns.

Column-I (Types of bacterial)	Column-II (Activity)
A.  Streptomyces	p.  Food poisoning
B.  Rhizobium	q.  Source of antibiotics
C.  Nitrosomonas	r.   Nitrogen fixation
D.  Acetobacter	s.   Nitrification
	t.   Vinegar synthesis

                                                                                            [KCET 2004]

(a)   A = q; B = r; C = p; D = t

(b)   A = q; B = r; C = s; D = t

(c)   A = s; B = t; C = p; D = r

(d)   A = t; B = p; C = r; D = s

20. The bacteria Pseudomonas is useful because of its ability to

[AIIMS 2004]

(a)   Transfer genes from one plant to another

(b)   Decompose a variety of organic compounds

(c)   Fix atmospheric nitrogen in the soil

(d)   Produce a wide variety of antibiotics

21. Pullorum disease of poultry is caused by [KCET 2000]

(a)   Hemophilus                           (b)   Clostridium

(c)   Salmonella                            (d)   Mycobacterium

22. Which of the following is a seed borne disease [DPMT 2004]

(a)   Bacterial blight of rice

(b)   Kharia of paddy

(c)   Whiptail of Brassica

(d)   All of these

23. Which character is applicable to mycoplasma

(a)   Pass through bacteria-proof filter paper

(b)   Osmotically stable

(c)   Require sterol for growth

(d)   All the above

24. Mycoplasma mycoides causes which of the following diseases

(a)   Bovine pleuropneumonia

(b)   Inflammation of genitals

(c)   Agalactia

(d)   None of these

25. Which of the following cell has got functional autonomy

(a)   Bacteria                                 (b)   Mycoplasma

***

(c)   Nostoc                                    (d)   All the above

1	d	2	a	3	b	4	c	5	d
6	a	7	a	8	c	9	d	10	b
11	a	12	c	13	a	14	b	15	b
16	a	17	c	18	b	19	b	20	b
21	c	22	a	23	d	24	a	25	d

2. (a) Rhodospirillum bacteria is facultative aerobic photo-autotrophic bacteria use non-sulphur aliphatic organic compound as donor of H₂ e.g., Propyl alcohol.
3. (b) Rhizosphere zone of bacteria are present around the root surface of leguminosae.
4. (c) Cyanobacteria are also called myxobacteria. In which flagella one completely absent but the movement occurs in some genera by special gliding motion. Such movement are connected with the secretion of mucilage.
5. (a) Exotoxin is produced by mostly gram positive bacteria, these are protenaceous and heat labile compound which are excreted by bacteria out side the cell.
6. (d) The mucopeptide or murein is a polymer of two amino sugars namely N-acetyl glucosamine (NAG) and N-acetyl muramic acid (NAM).
7. (b) Causing agent of Mycobacterium laprae can not be cultured.
8. (a)  + energy. Here  is utilized as a source of hydrogen, which reduces  into glucose. Oxygen is not liberated in bacterial photosynthesis.
9. (c) Salting of pickles, meat, fishes etc. and eddition of sugar to jams, jellies, cut fruits etc., prevent their decay by microbes, as the latter get killed due to plasmolysis or due to high concentration of salt or sugar.
10. (a) Endospore formation is more common in rod shaped bacteria or bacillus forms.
11. (b) Salmonellosis in poultry and eggs is caused by bacteria salmonella.
12. (b) Some bacteria damage cellulose of textiles. e.g., Spirochaeta cytophaga, cellulomonas etc.
13. (a) Bacteroid : Symbiotic bacteria Rhizobium leguminosarum in leguminous plants e.g., gram, pea etc. in their roots nodules produce Leg haemoglobin, this whole Bacteria + Leg haemoglobin + Polyploide cells of roots is called as bacteroid.
14. (a) Bacterial blight of rice is a seed born disease which is transmitted to paddy. Seedlings when raised under high humid conditions. This disease is caused by Xanthomonas oryzae.

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