question Which process involves the conversion of atmospheric nitrogen into ammonia

Microbiology

Which process involves the conversion of atmospheric nitrogen into ammonia?

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

Nitrogen fixation is the process by which atmospheric nitrogen is converted into ammonia by nitrogen-fixing bacteria.

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

A. Oxygen production through photosynthesis
B. Nitrogen fixation
C. Denitrification
D. Cellular respiration

Which process involves the conversion of organic nitrogen compounds to ammonia in the nitrogen cycle?

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

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

A. Cephalosporium spp.
B. Bacillus anthracis
C. Pseudomonas aeruginosa
D. Escherichia coli (E. coli)

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

A. Protection and adherence
B. Nutrient absorption
C. Facilitates cellular respiration
D. Synthesis of cellular ATP

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

A. Recycling of phosphorus in ecosystems
B. Nitrogen fixation
C. Photosynthesis
D. Cellular respiration

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)

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 function of the plasmid in bacterial cells?

A. Carries extra-chromosomal genes
B. Synthesizes cellular ATP
C. Initiates DNA replication
D. Facilitates protein synthesis

What is the primary function of the endocytosis in eukaryotic microbial cells?

A. Cellular uptake of substances
B. Synthesis of proteins
C. DNA replication
D. Cell wall formation