Cells in some filamentous cyanobacteria that are specialized for nitrogen fixation are called:
1. Phycobilisomes
2. Chromatophores
3. Grana
4. Heterocysts
The cyanobacteria are also referred to as
(1) protists
(2) golden algae
(3) slime moulds
(4) blue-green algae
Oxygenic photosynthesis occurs in
(1) Chromatium
(2) Oscillatoria
(3) Rhodospirillum
(4) Chlorobium
In prokaryotes, chromatophores are
(1) specialized granules responsible for colouration of cells
(2) structures responsbile for organizing the shape of the organism
(3) inclusion bodies lying free inside the cells for carrying out various metabolic activities
(4) internal membrane systems that may become extensive and complex in photosynthetic bacteria
Identify the labelled part in the given figure and select the correct option.
A | B | |
1. | Heterocyst | Mucilaginous sheath |
2. | Mucilaginous sheath | Heterocyst |
3. | Heterocyst | Capsid |
4. | Pseudopodia | Mucilaginous sheath |
Heterocysts present in Nostoc is specialised for
(1) fragmentation
(2) nitrogen-fixation
(3) symbiotic relation
(4) food storage
The function of nitrogen fixation in Anabaena (cyanobacterium) is performed by
(1) thylakoid
(2) heterocyst
(3) phycocyanin
(4) phycoerythrin
Cyanobacteria do not possess which feature?
(1) Unicellular
(2) Colonial or filamentous
(3) Form blooms in polluted water bodies
(4) Only marine algae
The specialised cells to fix atmospheric nitrogen is called as
(1) Heterocyst
(2) Heterocyte
(3) Heterocoem
(4) Heterolog
Find the incorrect match.
(1) Heterocyst-Archaebacteria
(2) Gelatinous sheath- BGA
(3) Methanogen- Biogas
(4) Chlorella- protista