AP-Micro (Microbiology) Microbial Ecology and Pathogenesis

Question 1

What is the term for a mutually beneficial relationship between a microorganism and its host?

Accepted Answer

Mutualism

Answer

Parasitism

Answer

Commensalism

Answer

Predation

Question 2

Which of the following is a key factor in microbial pathogenicity?

Accepted Answer

Production of virulence factors

Answer

Ability to form endospores

Answer

Presence of ribosomes

Answer

Speed of DNA replication

Question 3

What role do microbes play in nitrogen cycling in the environment?

Accepted Answer

Fix nitrogen into usable forms

Answer

Produce nitrogen gas

Answer

Release carbon dioxide

Answer

Break down proteins

Question 4

Which microorganism is most likely to cause an opportunistic infection?

Accepted Answer

Candida albicans in immunocompromised patients

Answer

Escherichia coli (E. coli) in the gut

Answer

Streptococcus pyogenes on the skin

Answer

Mycobacterium tuberculosis in healthy lungs

Question 5

What is the first line of defense against microbial pathogens in the human body?

Accepted Answer

Skin and mucous membranes

Answer

Antibodies

Answer

White blood cells

Answer

Fever