Single-celled eukaryotes are included in 

(a) Protista                   (b) Fungi

(c) Archaea                  (d) Monera

Subtopic:  Kingdom Protista: Introduction |
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Membrane-bound organelles are absent in

(1) Saccharomyces

(2) Streptococcus

(3) Chlamydomonas

(4) Plasmodium

Subtopic:  Kingdom Monera: Introduction |
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Virus envelope is known as

(1) capsid

(2) virion

(3) nucleoprotein

(4) core

Subtopic:  Virus, Viroids & Prions |
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Some hyperthermophilic organisms that grow in highly acidic (pH2) habitats belong to the two groups called

(1) eubacteria and archaea

(2) cyanobacteria and diatoms

(3) protists and mosses

(4) liverworts and yeasts

Subtopic:  Kingdom Monera: Bacterial Classification |
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Infectious proteins are present in

(1) gemini viruses

(2) prions

(3) viroids

(4) satellite viruses

Subtopic:  Virus, Viroids & Prions |
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Oxygenic photosynthesis occurs in

(1) Chromatium

(2) Oscillatoria

(3) Rhodospirillum

(4) Chlorobium

Subtopic:  Kingdom Monera: Blue Green Algae |
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T. O. Diener discovered a

(1) free infectious RNA

(2) free infectious DNA

(3) infectious protein

(4) bacteriophage

Subtopic:  Virus, Viroids & Prions |
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Consider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common

(A) spray with Bordeaux mixture

(B) control of the insect vector of the disease pathogen

(C) use of only disease-free seeds

(D) use of varieties resistant to the disease

Which two of the above measures can control the disease?

(1) B and C

(2) A and B

(3) C and D

(4) B and D

Subtopic:  Breeding for Disease Resistance |
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Bacterial leaf blight of rice is caused by a species of

(1) Xanthomonas

(2) Pseudomonas

(3) Alternaria

(4) Erwinia

Subtopic:  Kingdom Monera: Bacterial Classification |
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In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea?

(1) Archaea resemble eukarya in all respects

(2) Archaea have some novel features that are absent in other prokaryotes and eukaryotes

(3) Archaea completely differ from both prokaryotes and eukaryotes

(4) Archaea completely differ from prokaryotes

Subtopic:  Kingdom Monera: Bacterial Classification |
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