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Q. No.Match each item in Column I with one in Column II and select the correct match from the codes given:
Group of protozoans
Example
A.
Amoeboid
P.
Entamoeba
B.
Flagellated
Q.
Paramecium
C.
Ciliated
R.
Trypanosoma
D.
Sporozoan
S.
Plasmodium
Codes:
A
B
C
D
1.
Q
S
P
R
2.
S
Q
R
P
3.
P
R
Q
S
4.
R
P
S
Q
Subtopic: Protozoa |
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Identify the incorrect statement regarding heterotrophic bacteria?
| 1. | They are most abundant bacteria in nature |
| 2. | Many of them are important decomposers |
| 3. | They play a great role in recycling nutrients like nitrogen, phosphorus, iron and sulphur |
| 4. | They are helpful in making curd from milk, production of antibiotics, fixing nitrogen in legume roots, etc. |
Subtopic: Kingdom Monera: Bacterial Classification |
61%
Level 2: 60%+
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Which of the following organisms is not matched with the correct nature of the cell wall present in their cell/cells?
| Organism | Nature of cell wall | |
| 1. | True bacterium | Polysaccharide + Amino acid |
| 2. | Fungus | With chitin |
| 3. | Euglenoids | Cellulosic |
| 4. | Diatoms | Embedded with silica |
Subtopic: Kingdom Monera: Bacterial Classification |
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Name the scientist:
| I. | He studied the tobacco mosaic virus. |
| II. | He succeeded in extracting the virus in the form of pure crystals in 1935. |
| III. | He was able to show that the tobacco mosaic virus is composed of protein and RNA. |
| 1. | D. J. Ivanovsky | 2. | W. M. Stanley |
| 3. | M. W. Beijerinck | 4. | Louis Pasteur |
Subtopic: Virus, Viroids & Prions |
65%
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All the following statements regarding diatoms are true except:
| 1. | The two overlapping shells of cell wall fit together as in a soap box. |
| 2. | They are the chief ‘producers’ in the oceans. |
| 3. | Their cell walls are embedded with silica. |
| 4. | Diatoms behave like heterotrophs when deprived of sunlight. |
Subtopic: Kingdom Protista: Chrysophytes |
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Which of the following statements is incorrect regarding Mycoplasma?
| 1. | These organisms are naturally resistant to antibiotics that inhibit protein biosynthesis |
| 2. | These organisms are naturally resistant to antibiotics that target the cell wall |
| 3. | These organisms are naturally resistant to antibiotics that inhibit DNA replication |
| 4. | These organisms are naturally resistant to antibiotics that inhibit folic acid metabolism |
Subtopic: Kingdom Monera: Actinomycetes & Mycoplasma |
60%
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Which of the following statements is not true regarding the mode of reproduction of organisms belonging to different classes of the kingdom fungi?
| 1. | Large number of members of deuteromycetes are decomposers of litter and help in mineral cycling |
| 2. | Sex organs are absent in basidiomycetes but plasmogamy is brought about by fusion of the nuclei of the gametes |
| 3. | The asexual spores produced by ascomycetes are conidia, produced exogenously on the special mycelium called conidiophores |
| 4. | In ascomycetes and basidiomycetes, an intervening dikaryon stage exists before the fusion of parental nuclei |
Subtopic: Kingdom Fungi: Basidomycetes |
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Match the group of Protozoans to a feature these protozoans exhibit:
| Column I | Column II | ||
| A | Amoeboid | P | They have a cavity (gullet) that opens to the outside of the cell surface into which water laden food is steered |
| B | Flagellated | Q | Marine forms have silica shells on their surface |
| C | Ciliated | R | The parasitic forms cause diseases such as sleeping sickness |
| D | Sporozoans | S | They have an infectious spore-like stage in their life cycles |
| A | B | C | D | |
| 1 | R | Q | P | S |
| 2 | Q | R | P | S |
| 3 | Q | R | S | P |
| 4 | S | Q | R | P |
Subtopic: Protozoa |
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Mycoplasma:
| I: | completely lack a cell wall |
| II: | are the smallest living cells known |
| III: | can survive without oxygen |
| 1. | Only I and II are true |
| 2. | Only I and III are true |
| 3. | Only II and III are true |
| 4. | All I, II and III are true |
Subtopic: Kingdom Monera: Actinomycetes & Mycoplasma |
93%
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Given below are two statements: one is labeled Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements, choose the correct answer from the options given below:
| Assertion (A): | Alternaria, Colletotrichum and Trichoderma are kept in the fungal class- deuteromycetes. |
| Reason (R): | Asexual and vegetative phases in the life cycle of these fungi are not known. |
In the light of the above statements, choose the correct answer from the options given below:
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Kingdom Fungi: Deuteromycetes |
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