The process of nitrogen fixation in cyanobacteria occurs within specialized cells called:
Akinetes
Hormogonia
Heterocysts
Carboxysomes
Related Questions
Which of the following diseases are caused by bacteria?
I. Flu II. Cholera
III. Typhoid IV. Tetanus
Codes
I, II and III
II, III and IV
I, III and IV
I, II, III and IV
Thermococcus,Methanococcus and Methanobacterium exemplify
Archaebacteria that contain protein homologous to eukaryotic core histones
Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Bacteria whose DNA is relaxed or positively supercoiled but, which have a cytoskeleton as well as mitochondria
Bacteria that contain a cytoskeleton and ribosomes
Which one of the following statements about mycoplasma is wrong?
Mycoplasmas lack a cell wall.
Mycoplasmas are facultative anaerobes.
Mycoplasmas have a rigid cell wall.
Mycoplasmas have a small genome.
Myxomycetes are
Saprobes or parasites having mycelia, asexual reproduction by fragmentation and sexual reproduction by fusion of gametes
Slimy mass of multinucleate protoplasm, having pseudopodia like structures for engulfing food, reproduction through fragmentation or zoospores
Prokaryotic organisms, cellular or acellular, saprobes or autotrophic, reproduce by binary fission
Eukaryotic, single-celled or filamentous, saprobes or autotrophic, asexual reproduction by division of haploid individuals, sexual reproduction by fusion of two cells or their nuclei
Consider the following statements about mycoplasma
I. It is pleuomorphic bacteria, which lacks cell wall
II. Mycoplasma is the smallest living organism
III. They can not survive without oxygen
IV. Many mycoplasma are pathogenic in animals and plants
Which of the statements given above are correct?
I, II and III
II, III and IV
I, II and IV
I, II, III and IV
Which is correct for the structure of cell wall of bacteria and fungi?
Both are made up of cellulose
Both have mucopeptide
Both are made up of N-acetylglucosamine
None of the above
Examples for Branched filamentous Bacteria: I) Mycobacterium (II) Corynebacterium (III) Xanthamonas (IV) Salmonella
I and II only
II and III only
I, II, and III only
I, II, III, and IV
Prokaryotic organisms capable of nitrogen fixation in specialized cells called heterocyst
Have chlorophyll a similar to green plants
Are generally not surrounded by gelatinous sheath in colonial forms
Lack photolysis of water and PSI
May have chemosynthetic nutrition also
Thermococcus,Methanococcus and Methanobacterium exemplify
Archaebacteria that contain protein homologous to eukaryotic core histones
Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
Bacteria whose DNA is relaxed or positively supercoiled but, which have a cytoskeleton as well as mitochondria
Bacteria that contain a cytoskeleton and ribosomes
An example for plant growth promoting rhizobacterium, which produces iron chelating substances, is
Pseudomonas putida
Rhizobium japonicum
Aspergillus flavus
Azospirillum
