bacteria-morphology microbiology question and answers -Page 3

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Bacteria Morphology problems

1. Which of the following may contain fimbriae?
Options
A. Gram-positive bacteria
B. Gram-negative bacteria
C. Both (a) and (b)
D. None of these

Discuss

Correct Answer: Gram-negative bacteria

2. In which of the following, lipo-polysaccharide is a major constituent of outer membrane of the cellwall?
Options
A. Gram-positive bacteria
B. Gram-negative bacteria
C. Fungi
D. None of these

Discuss

Correct Answer: Gram-negative bacteria

3. Name the component of flagellum.
Options
A. Filament
B. Hook
C. Basal body
D. All of these

Discuss

Correct Answer: All of these

4. Peptidoglycan accounts for __________ of the dry weight of cell wall in many gram positive bacteria
Options
A. 50% or more
B. About 10%
C. 11%+ 0.22%
D. About 20%

Discuss

Correct Answer: 50% or more

5. Bacteria having no flagella are unable to
Options
A. move
B. reproduce
C. stick to tissue surfaces
D. grow in nutrient agar

Discuss

Correct Answer: move

6. Which of the following organism has sterols in their cytoplasmic membrane?
Options
A. Clostridum
B. Proteus
C. Mycoplasma
D. Bacillius

Discuss

Correct Answer: Mycoplasma

7. Which of the following does not contain protein?
Options
A. Pili
B. Flagellum
C. Lipoteichoic acid
D. Porin

Discuss

Correct Answer: Lipoteichoic acid

8. A cluster of polar flagella is called
Options
A. lophotrichous
B. amphitrichous
C. monotrichous
D. petritrichous

Discuss

Correct Answer: lophotrichous

9. The next to last step in peptidoglycan biosynthesis is
Options
A. synthesis of the NAM-peptide subunit
B. removal of the subunit from bactoprenol
C. linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain
D. cross-linking the peptide side chains of peptidoglycan

Discuss

Correct Answer: linking the sugar of the disaccharide-peptide unit to the growing peptidoglycan chain

10. Microcapsules are composed of
Options
A. proteins
B. polysaccharides
C. lipids
D. all of these

Discuss

Correct Answer: all of these

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