Q. Which of these is a cocci occurring in single or pairs?
(a) Diplococci
(b) Streptococci
(c) Tetracocci
(d) None of the above
Answer: :: (a)
Q. Flagella in bacteria enable them to
(a) reproduce
(b) locomote
(c) Thrive in nutrient agar
(d) Adhere to tissue surfaces
Answer: :: (b)
Q. This about cell wall of gram-positive bacteria is true
(a) cell wall comprises of many layers
(b) the cell wall is thicker than the associated gram-negative bacteria
(c) Cell wall comprises of teichoic acids
(d) All of the above
Answer: :: (d)
Q. What is Chemotaxis?
(a) Swimming towards a bacteria
(b) Swimming away of a bacteria
(c) In the presence of a chemical compound, swimming towards or away of a bacteria
(d) None of these
Answer: :: (c)
Q. Which of these is exposed on the outer surface of a gram-negative bacterium?
(a) Braun lipoprotein
(b) O-antigen of lipopolysaccharide (LPS)
(c) Polysaccharide portion of lipoteichoic acid (LTA)
(d) Electron transport system components
Answer: :: (b)
Q. The covalent bond which links the cell walls of gram-positive bacteria containing two modified sugars – N – acetylmuramic acid (NAM) and N-acetyl glucosamine (NAG) is
(a) glycosidic bond
(b) 1,4-glycosidic bond
(c) 1,6-glycosidic bond
(d) glycosidic bond
Answer: :: (b)
Q. Which one of these has a Chinese letter arrangement?
(a) Clostridium tetani
(b) Mycobacterium tuberculosis
(c) Bacillus anthracis
(d) Corynebacterium diphtheriae
Answer: :: (d)
Q. This is analogous to mesosomes of bacteria
(a) Golgi apparatus of eukaryotes
(b) Lysosomes of eukaryotes
(c) Mitochondria of eukaryotes
(d) None of the above
Answer: :: (c)
