Polyhydroxybutyrate (PHB) granules in prokaryotes serve primarily as a reserve of:
Nitrogen
Phosphorus
Carbon and energy
Sulfur
Related Questions
Which statement is not true about prokaryotes?
They contain ribosomes
Their DNA is usually circular
Most have a cell wall
They contain membrane-bound organelles
Which of the following is NOT a characteristic of inclusion bodies?
Dense, particulate structures
Composed primarily of protein
Membrane-bound
Often found in diseased or stressed cells
Which of the following statements are correct about prokaryotic cells?
I. DNA lies freely in the cytoplasm, not associated with any organelle
II. The amount of DNA do not change as there are no haploid and diploid stages
III. Transcription and translation occurs in the cytoplasm
IV. Protein synthesis occurs only in the cytoplasm
Correct option regarding the above statement is
I, II and III
I and II
Only I
I, II, III and IV
The plasmid DNA confers certain unique characters to bacteria in which they are found. This include
I. resistance to antibiotics
II. no resistance to antibiotics
III. monitor bacterial transformation with foreign DNA
The correct option is
I and II only
I and III only
II and III only
I, II and III
Select the wrong statement
Mycoplasma is a wall-less micro organism.
Bacterial cell wall is made up of peptidoglycan.cj
Pili and fimbriae are mainly involved in motility of bacterial cells.
Cyanobacteria lack flagellated cells.
In , fimbriae takes part in …A…, while in it helps in …B… Choose appropriate options for A and B to complete the given statement
A-conjugation; B-attachment
A-attachment; B-conjugation
A-movement only; B-conjugation
A-attachment; B-movement only
Which of these structures is found in some prokaryotes but NOT in all?
Ribosomes
Cell wall
Plasma membrane
Plasmids
Which of the following statements about inclusion bodies is incorrect ?
They are not bound by any membrane
These are involved in ingestion of food particles
They lie free in the cytoplasm
These represent reserve material in cytoplasm
Which one is the correct statement about the bacterial cell envelope?
The outermost cell wall is followed by glycocalyx and then the plasma membrane
Cell envelope is chemically very simple and consists of only plasma membrane
The outermost glycocalyx is followed by cell wall and plasma membrane
The outermost glycocalyx is followed by plasma membrane and then the cell wall
Arrange the following steps in a correct sequence as per Gram’s staining technique
I. Treatment with 0.5% iodine solution
II. Washing with water
III. Treatment with absolute alcohol/acetone
IV. Staining with weak alkaline solution of crystal violet
The correct sequence is
IIIIVIII
IVIIIIII
IIIIIIIV
IIVIIIII
