Viruses are no more "alive" than isolated chromosomes because: -
1. They require both RNA and DNA
2. They both need food molecules
3. They both require oxygen for respiration
4. Both require the environment of a cell to replicate
The thalloid body of a slime mould (Myxomycetes) is known as:
1. | protonema | 2. | Plasmodium |
3. | fruiting body | 4. | mycelium |
Barophilic prokaryotes
1. Occur in water containing high concentration of barium hydroxide
2. Grow slowly in alkaline frozen lakes at high altitude
3. Grow and multiply in very deep marine sediments
4. Readily grow and divide in sea water enriched with soluble salt of barium
T.O. Diener discovered a
1. | free infectious RNA | 2. | free infectious DNA |
3. | infectious protein | 4. | bacteriophage |
After karyogamy followed by meiosis, spores are produced exogenously in
1. | Neurospora | 2. | Alternaria |
3. | Agaricus | 4. | Saccharomyces |
One of the major compound of cell wall of most fungi is:
1. | peptidoglycan | 2. | cellulose |
3. | hemicelluloses | 4. | chitin |
The guts of cow and buffalo possess
1. | Fucus sp | 2. | Chlorella sp |
3. | methanogens | 4. | cyanobacteria |
How many organisms in the list given below are autotrophs ?
Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia
1. | Five | 2. | Six |
3. | Three | 4. | Four |