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.

What is the primary mode of nutrition in fungi?

A. Heterotrophic
B. Autotrophic
C. Mixotrophic
D. Parasitic

What is the primary mode of transmission of the influenza virus?

A. Respiratory droplets
B. Contaminated water
C. Vector (e.g., mosquito)
D. Sexual contact

What is the primary function of the microbiome in the human body?

A. Maintaining a balance of beneficial microorganisms
B. Aiding in locomotion
C. Producing hormones
D. Facilitating blood circulation

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

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

Which of the following diseases is caused by a protozoan?

A. Malaria
B. Tuberculosis
C. Influenza
D. Lyme disease

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

A. Contains the bacterial chromosome
B. Synthesizes cellular ATP
C. Initiates DNA replication
D. Facilitates protein synthesis

What is the function of the endospore in bacteria?

A. Survival in harsh conditions
B. Facilitating nutrient absorption
C. Reproduction
D. Protection from UV radiation

Which of the following is an example of a Gram-negative bacterium?

A. Escherichia coli (E. coli)
B. Staphylococcus aureus
C. Bacillus subtilis
D. Clostridium difficile

Which process involves the conversion of atmospheric nitrogen into ammonia?

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

Which microorganism is responsible for fermentation?

A. Yeast
B. Escherichia coli (E. coli)
C. Staphylococcus aureus
D. Mycobacterium tuberculosis