During the formation of bread, it becomes porous due to the release of CO2 by the action of:
Yeast
Bacteria
Virus
Protozoans
A virus is made up of:
Protein only
DNA only
RNA only
Protein and DNA/RNA
In bacteria, plasmid is:
Extra-chromosomal material
Main DNA
Non functional DNA
Repetitive gene
Which of the following protozoa contains chlorophyll?
Amoeba
Euglena
Paramecium
Trypanosoma
Which of the following statements is correct about the structure of cell walls of fungi and bacteria?
Both have mucopeptide
Both are made up of carbohydrates
Both are made up of cellulose
Both are made up of n-acetylglucosamine
Which one of the following statements about viruses is correct?
Nucleic acid of viruses is known as capsid
Viruses possess their own metabolic system
All viruses contain both RNA and DNA
Viruses are obligate parasites.
A non-photosynthetic aerobic nitrogen fixing soil bacterium is:
Rhizobium
Clostridium
Azotobacter
Klebsiella
Name the organisms which do not derive energy directly or indirectly from sun:
Chemosynthetic bacteria
Pathogenic bacteria
Symbiotic bacteria
Mould
Due to which of the following organisms, yield of rice has been increased?
Anabaena
Sesbania
Bacillus polymyxa
Which is the site of respiration in bacteria?
Episome
Mesosome
Ribosome
Microsome
