The most primitive organisms showing oxygenic photosynthesis are
Green algae
Chrysophytes
Green and Purple Sulpher Bacteria
Cyanobacteria
Related Questions
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
In prokaryotes, motility is provided by
Pili
Cilia
Flagella
Fimbriae
Which is the hereditary material in bacteria?
DNA
RNA
Proteins
Lipids
The main difference between Gram positive and Gram negative bacteria is
Cell membrane
Cell wall
Ribosome
Mitochondria
Which organism does not evolve oxygen in photosynthesis
Anabaena
Funaria
Pisum
Rhodospirillum
Which of the following is NOT a characteristic of the prokaryotes involved in biogas production from ruminant dung?
Are prokaryotic
Belong to Archaebacteria
Essential for methane production
Require oxygen for survival
Which of the following statements is FALSE regarding plasmids?
They are self-replicating.
They can carry genes for antibiotic resistance.
They are always integrated into the bacterial chromosome.
They are extrachromosomal DNA molecules.
Read the given statements and select the correct option.
Statement A: Monerans are most primitive organisms
Statement B: Monerans include only Bacteria
Statement A is correct and Statement B is incorrect
Statement A is incorrect and Statement B is correct
Both Statement A and Statement B are correct
Both Statement A and Statement B are incorrect
State whether the given statements are true or false
I. Bacteria shows both autotrophic and heterotrophic nutrition
II. Some of the bacteria are autotrophic. They may be photosynthetic autotrophic or chemosynthetic autotrophic
III. Heterotrophic nutrition involves the obtaining of readymade organic nutrients from outside sources
I and II are true
I is true, II and III is false
I, II and III are true
I, II and III
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.
