Q. No.Which of the following rRNAs acts as structural RNA as well as ribozyme in bacterial?
1. 5-8s rRNA
2. 5S rRNA
3. 18 S rRNA
4. 23S rRNA
1. 5-8s rRNA
2. 5S rRNA
3. 18 S rRNA
4. 23S rRNA
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Study the four statements (A – D) given below and select the two correct ones out of them:
A. Definition of biological species was given by Ernst Mayr.
B. Photoperiod does not affect reproduction in plants.
C. Binomial nomenclature system was given by R. H. Whittaker.
D. In unicellular organisms, reproduction is synonymous with growth.
The two correct statements are
1. A and B
2. B and C
3. C and D
4. A and D
Which among the following are the smallest living cells known without a definite cell wall that are pathogenic to plants as well as animals and can survive without oxygen?
1. Bacillus
2. Pseudomonas
3. Mycoplasma
4. Nostoc
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Which of the following are found in extreme saline conditions?
1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria
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Viroids differ from viruses in having
1. DNA molecules with protein coat
2. DNA molecules without protein coat
3. RNA molecules with protein coat
4. RNA molecules without protein coat
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Which of the following features is common to prokaryotes and many eukaryotes?
1. Chromosomes present
2. Cell wall present
3. Nuclear membrane present
4. Sub cellular organelles present
The five kingdom classification was proposed by
| 1. | R. H. Whittaker | 2. | C. Linnaeus |
| 3. | A. Roxberg | 4. | Virchow |
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Organisms living in salty are called as
1. Methanogens
2. Halophiles
3. Heliophytes
4. Thermoacidophiles
Naked cytoplasm, multinucleated and saprophytic are the characteristics of
| 1. | Monera | 2. | Protista |
| 3. | Fungi | 4. | Slime molds |
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