Semiconservative replication of DNA was first demonstrated in
1. Salmonella typhimurium
2. Drosophila melanogaster
3. Escherichia coli
4. Streptococcus pneumoniae

The common nitrogen-fixer in paddy fields is
1. Azospirillum
2. Oscillatoria
3. Frankia
4. Rhizobium

Membrane-bound organelles are absent in
1. Streptococcus
2. Chlamydomonas
3. Plasmodium
4. Saccharomyces

Ringworm in humans in caused by
1. Fungi
2. Nematodes
3. Viruses
4. Bacteria

Single-celled eukaryotes are included in
1. Fungi
2. Archaea
3. Monera
4. Protista

A prokaryotic autotrophic nitrogen fixing symbiont is found in :
1. Alnus
2. Cycas
3. Cicer
4. Pisum

The Cyanobacteria are also referred to as
1. Protists
2. Golden algae
3. Slime moulds
4. Blue green algae

A nitrogen-fixing microbe associated with Azolla in rice fields is :
1. Spirulina
2. Anabaena
3. Frankia
4. Tolypothrix

Nuclear membrane is absent in
1. Penicillium
2. Agaricus
3. Volvox
4. Nostoc