question Which process involves the conversion of nitrate to nitrogen gas in the nitrogen cycle

Microbiology

Which process involves the conversion of nitrate to nitrogen gas in the nitrogen cycle?

A. Denitrification
B. Nitrogen fixation
C. Nitrification
D. Ammonification

Denitrification is the process by which nitrate is converted to nitrogen gas in the nitrogen cycle.

Which microorganism is used in the production of antibiotics such as tetracycline?

A. Streptomyces aureofaciens
B. Bacillus anthracis
C. Pseudomonas aeruginosa
D. Escherichia coli (E. coli)

What is the primary role of microorganisms in the sulfur cycle?

A. Conversion of sulfur between different forms
B. Nitrogen fixation
C. Photosynthesis
D. Cellular respiration

Which microorganism is used in the production of antibiotics such as vancomycin?

A. Amycolatopsis orientalis
B. Bacillus anthracis
C. Pseudomonas aeruginosa
D. Escherichia coli (E. coli)

Which microorganism is responsible for the production of butyric acid?

A. Clostridium butyricum
B. Bacillus subtilis
C. Streptococcus pneumoniae
D. Candida albicans

What is the primary function of the Gram-positive bacterial cell wall?

A. Provides structural support
B. Facilitates nutrient absorption
C. Enables motility
D. Protects against phagocytosis

What is the function of the Gram stain in microbiology?

A. Distinguishing bacterial cell walls
B. Identifying viral infections
C. Staining fungal hyphae
D. Differentiating plant cells

What is the primary function of the capsule in bacterial cells?

A. Protection from immune defenses
B. Nutrient absorption
C. Facilitates cell division
D. Enhances cellular respiration

Which process involves the conversion of atmospheric nitrogen into ammonia?

A. Nitrogen fixation
B. Nitrification
C. Denitrification
D. Ammonification

What is the primary function of the mesosome in bacterial cells?

A. Cellular respiration
B. DNA replication
C. Protein synthesis
D. Cell division regulation

Which of the following is a prokaryotic microorganism?

A. Bacteria
B. Fungi
C. Protozoa
D. Algae