
Quiz on Nitrogen Metabolism in Dental Biofilm

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Nadia Asror
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main source of nitrogen in dental plaque?
Lactic acid
Sodium chloride
Glucose
Salivary urea
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which bacteria are known for high urease activity in dental plaque?
Escherichia coli
Actinomyces naeslundii
Staphylococcus aureus
Lactobacillus casei
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role does ammonia play in the oral environment?
Decreases plaque pH
Increases plaque pH
Promotes enamel demineralization
Inhibits bacterial growth
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of salivary peptides like sialin?
Promote protein degradation
Modulate bacterial metabolism
Increase acidity
Inhibit urea breakdown
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which amino acid is converted into ammonia via the arginine deiminase system?
Cysteine
Arginine
Lysine
Glutamate
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a harmful effect of ammonia in periodontal tissues?
Enhances nutrient absorption
Promotes tissue healing
Increases tissue permeability
Reduces inflammation
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of bacteria primarily utilize gingival crevicular fluid in periodontal pockets?
Saccharolytic bacteria
Aerobic bacteria
Anaerobic bacteria
Asaccharolytic bacteria
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