Select wrong statement.

(1) The viroids were discovered by D.J. lvanowsky.

(2) W.M. Stanley showed that viruses could be crystallized.

(3) The term 'contagium vivum fluidum' was coined by M.W. Beijerinek.

(4) Mosaic disease in tobacco and AIDS in human being are caused by viruses.

Subtopic:  Virus, Viroids & Prions |
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Choose the wrong statement.

1. Penicillium is multicellular and produces antibiotics.

2. Neurospora is used in the study of biochemical genetics.

3. Morels and truffles are poisonous mushrooms.

4. Yeast is unicellular and useful in fermentation.

Subtopic:  Kingdom Fungi: Ascomycetes |
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The structures that help some bacteria to attach to rocks and/or host tissues are

1. rhizoids

2. fimbriae

3. mesosomes

4. holdfast

Subtopic:  Kingdom Monera: Surface Appendages |
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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

Subtopic:  Kingdom Protista: Chrysophytes |
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Pick up the wrong statement.

1. Cell wall is absent in Animalia.

2. Protista have photosynthetic and heterotrophic modes of nutrition.

3. Some fungi are edible.

4. Nuclear membrane is present in Monera.

Subtopic:  Kingdom Monera: Introduction |
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Which of the following are likely to be present in deep sea water ?

(1) Archaebacteria

(2) Eubacteria

(3) Blue-green algae

(4) Saprophytic fungi

Subtopic:  Kingdom Monera: Bacterial Classification |
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The rod shaped cells of Bacillus megatarium are converted to spherical units called protoplasts on treatment with the enzyme

(1) lysozyme

(2) cellulase

(3) cellulase and hemicellulase

(4) cellulase, hemicellulase and pectinase

Subtopic:  Kingdom Monera: Bacterial Classification |
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The characteristic features of the mycoplasma are that

(1) they are much smaller than bacteria in size

(2) they can be grown on cell free medium

(3) they are highly pleomorphic and are bounded by a triple layered unit membrane

(4) all of the above

Subtopic:  Kingdom Monera: Actinomycetes & Mycoplasma |
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The kingdom protista does  not include

(1) photosynthetic organisms

(2) flagellate organisms

(3) parasitic organisms

(4) bacteria

Subtopic:  Kingdom Protista: Introduction |
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A lichen that grows by branching is described as 

(1) fruticose

(2) crustose

(3) foliose

(4) dichotose

Subtopic:  Lichens |
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