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Q. No.Cr-Jacob disease (CJD) in humans is caused by:
1.
An agent which causes mosaic formation in plants
2.
An agent having DNA
3.
An agent which consists of abnormally folded protein and is similar in size to viruses
4.
The same agent which causes potato spindle tuber disease
Subtopic: Virus, Viroids & Prions |
59%
From NCERT
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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 |
87%
From NCERT
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Who showed that viruses could be crystallised and crystals consist largely of proteins?
1. M. W. Beijerinck
2. D. J. Ivanowsky
3. T. O. Diener
4. W. M. Stanley
1. M. W. Beijerinck
2. D. J. Ivanowsky
3. T. O. Diener
4. W. M. Stanley
Subtopic: Virus, Viroids & Prions |
85%
From NCERT
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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: Kingdom Protista: Chrysophytes | Kingdom Protista: Euglenoids | Protozoa |
86%
From NCERT
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What is the correct order of the steps involved in the sexual cycle of organisms belonging to the Kingdom Fungi?
1. Plasmogamy — Karyogamy — Meiosis in zygote
2. Meiosis in zygote — Plasmogamy — Karyogamy
3. Karyogamy — Meiosis in zygote — Plasmogamy
4. Karyogamy — Plasmogamy — Meiosis in zygote
1. Plasmogamy — Karyogamy — Meiosis in zygote
2. Meiosis in zygote — Plasmogamy — Karyogamy
3. Karyogamy — Meiosis in zygote — Plasmogamy
4. Karyogamy — Plasmogamy — Meiosis in zygote
Subtopic: Kingdom Fungi: Introduction | Kingdom Fungi: Sexual Reproduction in Fungi |
89%
From NCERT
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Who proposed the five kingdom classification?
1. Carolus Linnaeus
2. Aristotle
3. Bentham and Hooker
4. R. H. Whittaker
1. Carolus Linnaeus
2. Aristotle
3. Bentham and Hooker
4. R. H. Whittaker
Subtopic: Different Classification Systems |
95%
From NCERT
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The rod-shaped bacteria belongs to which of the following category of bacteria?
1. Vibrio
2. Bacillus
3. Coccus
4. Spirillum
1. Vibrio
2. Bacillus
3. Coccus
4. Spirillum
Subtopic: Kingdom Monera: Introduction |
93%
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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In which of the following class of fungi, sex organs are absent and plasmogamy is brought about by fusion of two vegetative or somatic cells of different strains or genotypes?
| 1. | Ascomycetes | 2. | Phycomycetes |
| 3. | Basidiomycetes | 4. | Deuteromycetes |
Subtopic: Kingdom Fungi: Basidomycetes |
68%
From NCERT
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Who showed that viruses could be crystallised and crystals consist largely of proteins?
1. M. W. Beijerinck
2. D. J. Ivanowsky
3. T. O. Diener
4. W. M. Stanley
1. M. W. Beijerinck
2. D. J. Ivanowsky
3. T. O. Diener
4. W. M. Stanley
Subtopic: Virus, Viroids & Prions |
91%
From NCERT
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