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Microbiology Objective Questions { Bacteria Morphology }



1. Which of the following bacteria lack a cell wall and are therefore resistant to penicillin?
A.Cyanobacteria
B.Mycoplasmas
C.Bdellovibrios
D.Spirochetes
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2. A cluster of polar flagella is called
A.lophotrichous
B.amphitrichous
C.monotrichous
D.petritrichous
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3. Flagella move the cell by
A.many flagella beating in a synchronous, whip-like motion
B.an individual flagellum beating in a whip-like motion
C.spinning like a propeller
D.attaching to nearby particles and contracting
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4. The protein from which hook and filaments of flagella are composed of, is
A.keratin
B.flagellin
C.gelatin
D.casein
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5. The cooci which mostly occur in single or pairs are
A.Streptococci
B.Diplococci
C.Tetracocci
D.None of these
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6. Which of the following may contain fimbriae?
A.Gram-positive bacteria
B.Gram-negative bacteria
C.Both (a) and (b)
D.None of these
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7. Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteria
A.50% or more
B.About 10%
C.11%+ 0.22%
D.About 20%
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