EASY
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How many organisms in the list given below are autotrophs?

Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Saccharomyces, Trypanosoma, Porphyra, Wolffia

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Important Questions on Biological Classification

MEDIUM
The primary producers of the deep-sea hydrothermal vent ecosystem are
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Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygen?
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Anoxygenic photosynthesis is characteristic of:
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Identify combination of incorrect statements related to Cyanobacteria
I. Cyanobacteria are referred to as blue-green algae.
II. They perform oxygenic photosynthesis in chloroplasts.
II. The red-colour of red-sea is due to the presence of a cyanobacterial species Trichodesmium erythraeum.
IV. All the cyanobacterial species can fix atmospheric N2 in specialised cells called heterocysts.
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Which of the following is incorrect about Cynobacteria?
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Which one of the following statements is wrong?
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Ruminant animals can digest cellulose in their food, whereas human beings are unable to do so. This is because.
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Which of the following are found in extreme saline conditions?
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Who discovered the transfer of genetic material from one bacterium to another bacterium through pilus?
MEDIUM

Study the following statements
A) Archaea and Eukarya are more closely related to each other than bacteria
B) R.H. Whittaker placed unicellular eukaryotic organisms in the Kingdom Monera
C) Carl Woes replaced Kingdom Monera with two Kingdoms Bacteria and Archaea
D) 24 S subunit of ribosomal RNA is used in the identification of Microbes

In the above, incorrect statements are

MEDIUM

Match the following lists:

  List-I   List-II
(A) Photoautotroph (I) Nitrosomonas
(B) Chemoautotroph (II) Rhodospirillum
(C) Photoheterotroph (III) Salmonella
(D) Chemoheterotroph (IV) Chlorobium

The correct match is:

EASY
The structures that help some bacteria to attach to rocks and/or host tissue are:
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The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the: