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Q. No.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 |
59%
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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 |
55%
From NCERT
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Match the group of Protozoans to a feature these protozoans exhibit:
| Column 1 | Column 2 | ||
| 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 |
87%
From NCERT
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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%
From NCERT
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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 |
90%
From NCERT
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Diatomaceous earth is used as heat insulator in boilers and steam pipes because the cell wall of diatom is:
| 1. | composed of iron | 2. | composed of silicon dioxide |
| 3. | conductor of heat | 4. | bad conductor of electricity |
92%
From NCERT
In which group of organisms the cell walls form two thin overlapping shells which fit together?
| 1. | Chrysophytes | 2. | Euglenoids |
| 3. | Dinoflagellates | 4. | Slime moulds |
89%
From NCERT
Which of the following organisms are known as chief producers in the oceans?
| 1. | Dinoflagellates | 2. | Diatoms |
| 3. | Cyanobacteria | 4. | Euglenoids |
97%
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Select the wrong statement:
1. Cell wall is present in members of Fungi and Plantae
2. Mushrooms belong to Basidiomycetes
3. Pseudopodia are locomotory and feeding structures in Sporozoans
4. Mitochondria are the powerhouse of the cell in all kingdoms except monera
80%
From NCERT
How many organisms in the list given below are autotrophs ?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
| 1. | Five | 2. | Six |
| 3. | Three | 4. | Four |
57%
From NCERT
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