question What is the primary function of the immune system in the human body

Microbiology

What is the primary function of the immune system in the human body?

A. Defending against pathogens
B. Producing digestive enzymes
C. Synthesizing hormones
D. Facilitating blood circulation

The immune system defends the body against pathogens, including microorganisms.

Which of the following is a prokaryotic microorganism?

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

Which microorganism is responsible for the production of antibiotics such as gentamicin?

A. Micromonospora purpurea
B. Bacillus anthracis
C. Pseudomonas aeruginosa
D. Escherichia coli (E. coli)

Which microorganism is responsible for the production of antibiotics such as penicillin?

A. Penicillium
B. Streptococcus pyogenes
C. Escherichia coli (E. coli)
D. Mycobacterium tuberculosis

Which microorganism is responsible for the production of antibiotics such as chloramphenicol?

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

What is the function of the flagellum in bacteria?

A. Locomotion
B. Nutrient absorption
C. DNA replication
D. Antibiotic production

Which of the following is a viral disease in humans?

A. Influenza
B. Tuberculosis
C. Cholera
D. Malaria

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

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

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

Which microorganism is responsible for the production of beer in brewing?

A. Saccharomyces cerevisiae (brewer's yeast)
B. Lactobacillus
C. Streptococcus pyogenes
D. Pseudomonas aeruginosa

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