E-PolyLearning

101. Peptidoglycan is also known as
a. N-acetyl muramic acid
b. murein mucopeptide
c. N acetylglucosamine
d. mesodiaminopimetic acid
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Answer: (b).murein mucopeptide

102. Genetic system is located in the prokaryotes in
a. nucleoid
b. chromatin
c. nuclear material
d. all of these
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Answer: (d).all of these

103. Which is most likely to be exposed on the surface of a gram-negative bacterium?
a. Pore protein (porin)
b. Protein involved in energy generation
c. Lipoteichoic acid
d. Phospholipids
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Answer: (a).Pore protein (porin)

104. The last step in synthesis of peptidoglycan is
a. attachment of a peptide to muramic acid
b. attaching two amino acids to form a cross-link
c. attachment of a portion of peptidoglycan to a membrane lipid
d. binding of penicillin to a membrane protein
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Answer: (b).attaching two amino acids to form a cross-link

105. Cytoplasmic inclusions include
a. ribosomes
b. mesosomes
c. fat globules
d. all of these
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Answer: (d).all of these