E) 7) Two major structures that allow bacteria to adhere to surfaces areand 7) a
ID: 187249 • Letter: E
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E) 7) Two major structures that allow bacteria to adhere to surfaces areand 7) actin filaments, phospholipid membranes A) B) fimbrae, capsules C) lipopolysaccharides; teichoic acids endospores; metachromatic granules D) E) pili; ribosomes 8) Serological analysis for bacterial identification typically involves using 8) A) a microscope to determine cell morphology B) the analysis of the appearance of colonies C) the determination of guanine + cytosine base concentrations. D) specific antibodies to the bacterial cell antigens. E) methods to identify cell enzymes Which of the following is NOT a phenotypic trait of bacteria? biochemical reaction B) shape culture behavior D) rRNA sequence 9) 9) A) C) -- 10) Manual of Systematic Bacteriology is a manual of bacterial descriptions and classifications A) Leeuwenhock's B) Pasteur's C) Koch's D) Bergey's E) Lister's 11) At present, the most accurate indicator of evolutionary relatedness among organisms is to determine th A) similarities of cell membrane proteins B) size of the ribosomes C) size of the periplasmic space. D) nitrogen base sequence of rRNA. E) size of the bacterial chromosome. 12) A chain of rod-shaped cells would be called a 12) A) palisade. B) streptococcus. C) staphylococcus D) streptobacillus E) Staphylobacillus 13) 13) An irregular cluster of spherical cells is termed: A) palisades B) streptococcus. C) sarcina D) spirilla E) staphylococcus.Explanation / Answer
7) B) Fimbrae ; Capsules
Fimbrae are the hollow hair like structure present around the bacteria. While capsule is a thick layer of polysachrides present outside the cell wall of bacteria. Both FImbrae and Capsule helps in adhesion to the surface or to the other cells of the same type.
8) D) Specific antibodies to the bacterial cell antigens
Serology is the study of serum and other body fluids. It mainly involves the detection of antibodies present in the serum against a specific antigen. An antibody in the body is made when there is an antigen for it. Thus it helps in knowing the antigen specific infection in the body.
12) D) streptobacillus (Strepto + bacillus = Chain like arrangemet + Bacillus)
Strepto means chain and bacillus is for rod shape of the bacteria. Similarly for long cocci chain it will be Strptococcus.
13) E) staphylococci (Staphylo+ Cocci = Irregular cluster + cocci)
If its a cluster of bacteria then Staphylo is the abbrevation. A cluster of cocci bacteria will be called
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