Question is ⇒ Cyanobacteria have, Options are ⇒ (A) a gram-positive cell wall, (B) a gram-negative cell wall, (C) Neither (a) nor (b), (D) No cell wall, (E) , Leave your comments or Download question paper.

Question is ⇒ Cyanobacteria have, Options are ⇒ (A) a gram-positive cell wall, (B) a gram-negative cell wall, (C) Neither (a) nor (b), (D) No cell wall, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Cyanobacteria have
A.	a gram-positive cell wall [Wrong Answer]
B.	a gram-negative cell wall [Correct Answer]
C.	Neither (a) nor (b) [Wrong Answer]
D.	No cell wall [Wrong Answer]
View Answer 1 -2 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

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⇒ The cooci which mostly occur in single or pairs are
Streptococci
Diplococci
Tetracocci
None of these

⇒ Gram positive cells have a
second outer membrane that helps to retain the crystal violet stain
multiple layer of peptidoglycan that helps to retain the crystal violet stain
thick capsule that traps the crystal violet stain
periplasmic space that traps the crystal violet

⇒ The bacteria deficient in cell wall is
Treponema
Mycoplasma
Staphylococcus
Klebsiella

⇒ Cyanobacteria have
a gram-positive cell wall
a gram-negative cell wall
Neither (a) nor (b)
No cell wall

⇒ Which of the following is true about cell wall of gram-positive bacteria?
It consists of multiple layers
It is thicker than that associated with gram-negative bacteria
It contains teichoic acids
All of these

⇒ The protein from which hook and filaments of flagella are composed of, is
keratin
flagellin
gelatin
casein

⇒ A cluster of polar flagella is called
lophotrichous
amphitrichous
monotrichous
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⇒ Which of the following is analogous to mesosomes of bacteria?
Mitochondria of eukaryotes
Golgi apparatus of eukaryotes
Lysosomes of eukaryotes
None of these

⇒ Chemotaxis is a phenomenon of
swimming away of bacteria
swimming towards a bacteria
swimming away or towards of bacteria in presence of chemical compound
none of the above

⇒ Flagella move the cell by
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an individual flagellum beating in a whip-like motion
spinning like a propeller
attaching to nearby particles and contracting

⇒ Peptidoglycan is also known as
N-acetyl muramic acid
murein mucopeptide
N acetylglucosamine
mesodiaminopimetic acid

⇒ Porins are located in
the outer membrane of gram-negative bacteria
the peptidoglycan layer of gram-positive bacteria
the cytoplasmic membrane of both gram-negative and gram-positive bacteria
the periplasmic space of gram-negative bacteria

⇒ Bacteria having no flagella are unable to
move
reproduce
stick to tissue surfaces
grow in nutrient agar

⇒ Which of the following has Chinese letter arrangement?
Bacillus anthracis
Mycobacterium tuberculosis
Clostridium tetani
Corynebacterium diphtheriae

⇒ The next to last step in peptidoglycan biosynthesis is
synthesis of the NAM-peptide subunit
removal of the subunit from bactoprenol
linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain
cross-linking the peptide side chains of peptidoglycan

⇒ Which of the following is exposed on the outer surface of a gram-negative bacterium?
O-antigen of lipopolysaccharide (LPS)
Polysaccharide portion of lipoteichoic acid (LTA)
Braun lipoprotein
Electron transport system components

⇒ The structure responsible for motility of bacteria is
pilli
flagella
sheath
capsules

⇒ The cocci which forms a bunch and irregular pattern are
Staphylococci
diplococci
Tetracocci
Streptococci

⇒ Teichoic acids are typically found in
cell walls of gram positive bacteria
outer membranes of gram positive bacteria
cell walls of gram negative bacteria
outer membranes of gram negative bacteria

⇒ Which of the following bacterial genera (that produces endospore) have medical importance?
Clostridium
Bacillus
Both (a) and (b)
None of these

⇒ The cocci which forms a chain is
Streptococci
diplococci
Staphylococci
Tetracocci

⇒ Which of the following is not true about peptidoglycan?
It is a polymer consisting of N-acetyl glucosamine, N-acetyl muramic acid and amino acids (alanine, lysine, etc.)
It is present in prokaryotic cell wall
It occurs in the form of a bag shaped macro molecule surrounding the cytoplasm membrane
None of the above

⇒ Chemically the capsule may be
polypeptide
polysaccharide
either (a) or (b)
none of these

⇒ Microcapsules are composed of
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polysaccharides
lipids
all of these

⇒ In which of the following, lipo-polysaccharide is a major constituent of outer membrane of the cellwall?
Gram-positive bacteria
Gram-negative bacteria
Fungi
None of these

⇒ Single or clusters of flagella at both poles is known as
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amphitrichous
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⇒ The other name for peptidoglycan is
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murein
both (a) & (b)
none of these

⇒ The location where the bacterial chromosome concentrates is called
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nucleoid
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ribosomes
mesosomes
fat globules
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⇒ Genetic system is located in the prokaryotes in
nucleoid
chromatin
nuclear material
all of these