E-PolyLearning

121. 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
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Answer: (b).multiple layer of peptidoglycan that helps to retain the crystal violet stain

122. The common word for bacteria which are straight rod in shape is
a. cooci
b. bacilli
c. spirilla
d. pleomorphic
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Answer: (b).bacilli

123. A single polar flagella is known as
a. monotrichous
b. lophotrichous
c. amphitrichous
d. none of these
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Answer: (a).monotrichous

124. 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
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Answer: (a).cell walls of gram positive bacteria

125. In eukaryotic cells, ribosomes are
a. 70S
b. 60S
c. 80S
d. Not specific
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Answer: (c).80S