Virus envelope is known as:
1. capsid
2. virion
3. nucleoprotein
4. core
Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups called:
1. eubacteria and archaea
2. cyanobateria and diatoms
3. protists and mosses
4. liverworts and yeasts
Infectious proteins are present in:
1. geminiviruses
2. prions
3. viroids
4. satellite viruses
Oxygenic photosynthesis occurs in:
1. Chromatium
2. Oscillatoria
3. Rhodospirillum
4. Chlorobium
T.O. Diener discovered a:
1. free infectious RNA
2. free infectious DNA
3. infectious protein
4. bacteriophage
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 prokaryotes. |
1. | archaebacteria that contain protein homologous to eukaryotic core histones |
2. | archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled |
3. | bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria |
4. | bacteria that contain a cytoskeleton and ribosomes |
Which of the following is a slime mould?
1. Rhizopus
2. Physarum
3. Thiobacillus
4. Anabaena
Ergot of rye is caused by a species of:
1. Phytophthora
2. Uncinula
3. Ustilago
4. Claviceps
Which pair of the following belongs to Basidiomycetes?
1. Bird's nest fungi and Pufballs
2. Puffballs and Claviceps
3. Peziza and Stinkhorns
4. Morchella and Mushrooms