Bacteria MCQs | Bacteria General Awareness Multiple Choice Questions(MCQs) & Answers

Questions
1 All the bacteria fix nitrogen except
A Rhizobium
B E.coli
C Azotobacter
D cyanobacteria

Answer: E.coli
2 The iodine used in Gram staining serves as a
A Chelator
B Catalyst
C Mordant
D Cofactor

Answer: Mordant
3 The ability of bacteria to change their morphological form frequently is termed as
A Lysogeny
B Pleomorphism
C Alteromorphism
D None Of These

Answer: Pleomorphism
4 Surface appendage of bacteria meant for cell-cell attachment during conjugation is
A Pili
B Flagella
C Spinae
D Cilia

Answer: Pili
5 Bacterial chromosome is
A Single Stranded And Circular
B Double Stranded And Circular
C Single Stranded And Linear
D Double Stranded And Linear

Answer: Double Stranded And Circular
6 The region where bacterial genome resides is termed as
A Nucleus
B Cytoplasm
C Nucleoid
D Ribosome Free Region

Answer: Nucleoid
7 Membraneous infolding in bacteria that initiate DNA replication is
A Mesosomes
B Carboxysome
C Magnetosome
D Nulcleosome

Answer: Mesosomes
8 Mark the common feature between eukaryotes and prokaryotes.
A Shape of DNA
B Number of chromosomes
C A prokaryotic cell is similar to a eukaryotic organelle
D Cell wall

Answer: A prokaryotic cell is similar to a eukaryotic organelle
9 The largest bacteria which can be visible by unaided eye is_______
A Thiomargarita namibiensis
B Lactobacillus
C Mycoplasma
D Pseudomonas

Answer: Thiomargarita namibiensis
10 Name the scientist who proposed the phylogenetic tree for living things.
A Carlo Urbani
B Louis Pasteur
C Robert Koch
D Carl Woese

Answer: Carl Woese
11 Which of the following is NOT the basic shape of the bacteria?
A Rod shape
B Square shape
C Comma shape
D Spiral shape

Answer: Square shape
12 Name the acid present in the cell wall of bacteria which helps in retaining its color during the acid-fast test?
A Mycolic acid
B Teichoic acid
C Malic acid
D Tartaric acid

Answer: Mycolic acid
13 LPS (endotoxin) consist of
A Lipid A
B Core Polysaccharide
C O Antigen
D All Of The Above

Answer: All Of The Above
14 Which of the following is true about structure Gramm negative cell wall
A Thick Peptidoglycan Layer
B Periplasmie Space Is Absent
C Include Outer Membrane
D All Of The Above

Answer: Include Outer Membrane
15 Gram negative microorganisms
A Violet Color
B Pink-Red Color
C Green Color
D Black Color

Answer: Pink-Red Color
16 Gram’s staining consist of
A 2 stages
B 3 stages
C 4 stages
D 5 stages

Answer: 4 stages
17 The spore protects the genomic DNA from
A Intense Heat
B Radiation
C Chemical Agents
D All Of The Above

Answer: All Of The Above
18 The spore has
A Inner Membrane
B Two Peptidoglican Layers
C Outerkeratin- Like Coat
D All Of The Above

Answer: All Of The Above
19 To demonstrate volutin granules used
A Anjesky’ s staining
B Loefler’s technique
C Burri’s technique
D Morozov’ s staining

Answer: Loefler’s technique
20 To demonstrate capsule used
A Anjesky’ s staining
B Loefler’s technique
C Burri’s technique
D Morozov’ s staining

Answer: Burri’s technique
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