Cyanobacteria MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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Cyanobacteria is considered one the most difficult concept.
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24 Questions around this concept.
Solve by difficulty
EASYWhich of the following is not correctly matched for the organism and its cell wall degrading enzyme?
The cyanobacteria are also referred to as
Pigment-containing membranous extensions in some cyanobacteria are:
Besides paddy fields, cyanobacteria are also found inside vegetative parts of:
Which of the following organisms cannot fix nitrogen?
A. Azotobacter
B. Oscillatoria
C. Anabaena
D. Volvox
E. Nostoc
Choose the correct answer from the options given below:
Concepts Covered - 1
Cyanobacteria
- Cyanobacteria are also known as blue-green algae are photosynthetic prokaryotes.
- They are considered to be the most ancient forms of algae.
- Cyanobacteria are found in all kinds of environments.
- They possess photosynthetic pigments like chlorophyll a, phycocyanin and carotenoids.
- Their reserve food material is cyanophycean starch.
- They are unicellular, colonial or filamentous organisms.
- Each filament remains covered in a mucilage covering.
- Flagella are absent in cyanobacteria.
- Cyanobacteria do not have chloroplasts. Photosynthesis takes place in membranous stacks called chromatophores.
- Cyanobacteria possess heterocysts which are thick-walled cells that are found in terminal, intercalary or lateral position. It is involved in the nitrogen fixation.
- Examples: Spirulina ( highly proteinaceous superfood ), Nostoc, Oscillatoria, Anabaena and Rivularia etc.
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