Bacteria Gram Staining- Microbiology MCQ 033

131. The order of stains in Gram-staining procedure is
a. Crystal violet, Iodine solution, Alcohol,Saffranine
b. Iodine solution, Crystal Violet, Saffranine,Alcohol
c. Alcohol, Crystal Violet, Iodine solution,Saffranine
d. All of these
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132. The percentage of alcohol used in Gramstaining is
a. 75%
b. 90%
c. 60%
d. 25%
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133. Gram positive bacteria appear as
a. Pink
b. Violet
c. both a & b
d. None of these
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134. Gram negative bacteria appear as
a. Pink
b. Violet
c. both a & b
d. None of these
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135. The action of alcohol during Gramstaining is
a. Allows the color
b. It adds color
c. Decolorises the cells
d. None of these
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136. Lipid contents is more in
a. Gram negative bacteria
b. Gram positive bacteria
c. Same in both
d. None of these
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137. Cell-wall is
a. Thick in Gram positive than Gram negative
b. Thick in Gram negative than Gram positive
c. Equal in both
d. In Gram negative cell-wall is absent
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138. The Lipid content present in Gram positive bacterial cell-wall is
a. 1-10 %
b. 1-5 %
c. 2-8 %
d. None of these
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139. Rickettsiae stained by this technique responds as
a. Gram positive
b. Gram negative
c. Between positive and negative
d. None of these
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140. Chlamydiae occur in
a. Elementary bodies
b. Reticulate bodies
c. Complex structures
d. a and b
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