Archaea

Q. Organisms called methanogens are most abundant in a :

1. Hot spring
2. Sulphur rock
3. Cattle yard
4. Polluted stream

Q. Which of the following are found in extreme saline conditions?

1. Archaebacteria
2. Eubacteria
3. Cyanobacteria
4. Mycobacteria

Q. In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statement is true about archaea?

1. Archaea resembles eukarya in all respects
2. Archaea have some noble features that are absent in other prokaryotes and eukaryotes
3. Archaea completely differ from both prokaryotes and eukaryotes
4. Archaea completely differ from prokaryotes

Q.

Which bacteria are utilised in gobar gas plant?

1. Methanogens

2. Nitrifying bacteria

3. Ammonifying bacteria

4. Denitrifying bacteria

Q.

Many archaea are termed as

1. Neutrophiles

2. Thermophiles

3. Halophiles

4. Methanogens

Q.

Organisms found in extreme temperatures are

1. Cyanobacteria

2. Archaebacteria

3. Fungi

4. Eubacteria

Q.

The word archaea means

1. Ancient

2. Extreme conditions

3. Organisms with no symmetry

4. All of the above

Q. Biogas is produced by:

1. Archaebacteria
2. Cyanobacteria
3. Mycoplasma
4. None of the above