Bacteria Morphology
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The
bacteria deficient in cell wall is____________.
a
Treponema
b. Mycoplasma
c.
Staphylococcus
d.
Klebsiella
The
cocci which forms a chain is____________.
a. Streptococci
b.
diplococci
c.
Staphylococci
d.
Tetracocci
Which
of the following is not true about peptidoglycan?
a.
It is a polymer consisting of N-acetyl glucosamine, N-acetyl muramic acid and
amino acids (alanine, lysine, etc.)
b.
It is present in prokaryotic cell wall
c.
It occurs in the form of a bag shaped macro molecule surrounding the cytoplasm
membrane
d. None of the above
The
common word for bacteria which are spherical in shape is____________.
a. cocci
b.
bacilli
c.
spirilla
d.
pleomorphic
Which
of the following is exposed on the outer surface of a gram-negative bacterium?
a. O-antigen of
lipopolysaccharide (LPS)
b.
Polysaccharide portion of lipoteichoic acid (LTA)
c.
Braun lipoprotein
d.
Electron transport system components
Peptidoglycan
is found only in the bacterial____________.
a.
cell membrane
b.
glycocalyx
c. cell wall
d.
spore
Gram
positive cells have a____________.
a.
second outer membrane that helps to retain the crystal violet stain
b. multiple layer of
peptidoglycan that helps to retain the crystal violet stain
c.
thick capsule that traps the crystal violet stain
d.
periplasmic space that traps the crystal violet
A
single polar flagella is known as____________.
a. monotrichous
b.
lophotrichous
c.
amphitrichous
d.
none of these
Microcapsules
are composed of____________.
a.
proteins
b.
polysaccharides
c.
lipids
d. all of these
Teichoic
acids are typically found in____________.
a. cell walls of gram
positive bacteria
b.
outer membranes of gram positive bacteria
c.
cell walls of gram negative bacteria
d. outer membranes of gram negative bacteria
Which
of the following organism has sterols in their cytoplasmic membrane?
a.
Clostridum
b.
Proteus
c. Mycoplasma
d.
Bacillius
Chemically
the capsule may be____________.
a.
polypeptide
b.
polysaccharide
c. either (a) or (b)
d.
none of these
Swimming
towards a chemical of bacteria is termed as____________.
a. positive
chemotaxis
b.
negative chemotaxis
c.
phototaxis
d.
magnetotaxis
In
eukaryotic cells, ribosomes are____________.
a.
70S
b.
60S
c. 80S
d.
Not specific
Porins
are located in____________.
a. the outer membrane
of gram-negative bacteria
b.
the peptidoglycan layer of gram-positive bacteria
c.
the cytoplasmic membrane of both gram-negative and gram-positive bacteria
d.
the periplasmic space of gram-negative bacteria
The
common word for bacteria which are straight rod in shape is____________.
a.
cooci
b. bacilli
c.
spirilla
d.
pleomorphic
Which
of the following does not contain protein?
a.
Pili
b.
Flagellum
c. Lipoteichoic acid
d.
Porin
Which
of the following may be most likely to be missing from a gram-positive
bacterium?
a.
Penicillin binding protein
b.
Peptidoglycan
c. Lipopolysaccharide
d.
Phospholipid bilayer membrane
Which
of the following structure(s) is /are external to cell wall?
a.
Flagella
b.
Stalks
c.
Sheath
d. All of these
The
cell walls of Gram positive bacteria contain two modified sugar, viz. N-
acetylgucosamine (NAG) and N- acetylmuramic acid (NAM). They are covalently
linked by____________.
a.
α- 1,4-glycosidic bond
b.
β-1,6-glycosidic bond
c.
α- 1,6-glycosidic bond
d. β- 1,4-glycosidic
bond
Name
the component of flagellum____________.
a.
Filament
b.
Hook
c.
Basal body
d. All of these
The
location where the bacterial chromosome concentrates is called____________.
a.
nucleus
b.
nuclein
c. nucleoid
d.
nucleose
Which
of the following is analogous to mesosomes of bacteria?
a. Mitochondria of
eukaryotes
b.
Golgi apparatus of eukaryotes
c.
Lysosomes of eukaryotes
d.
None of these
Which
of the following has Chinese letter arrangement?
a.
Bacillus anthracis
b.
Mycobacterium tuberculosis
c.
Clostridium tetani
d. Corynebacterium
diphtheriae
The
other name for peptidoglycan is____________.
a.
mucopeptide
b.
murein
c. both (a) & (b)
d.
none of these
Cyanobacteria
have____________.
a.
a gram-positive cell wall
b. a gram-negative
cell wall
c.
Neither (a) nor (b)
d.
No cell wall
In
which of the following, lipo-polysaccharide is a major constituent of outer
membrane of the cellwall?
a.
Gram-positive bacteria
b. Gram-negative
bacteria
c.
Fungi