Chapter 1 Review Questions Flashcards
Which one of the following terms characterizes the interaction between herpes simplex virus and a human? (A) Parasitism (B) Symbiosis (C) Endosymbiosis (D) Endoparasitism (E) Consortia
A
Which one of the following agents lacks nucleic acid? (A) Bacteria (B) Viruses (C) Viroids (D) Prions (E) Protozoa
D
Which one of the following is a prokaryote? (A) Bacteria (B) Algae (C) Protozoa (D) Fungi (E) Slime molds
A
Which one of the following agents simultaneously contains both DNA and RNA? (A) Bacteria (B) Viruses (C) Viroids (D) Prions (E) Plasmids
A
Which of the following cannot be infected by viruses? (A) Bacteria (B) Protozoa (C) Human cells (D) Viruses (E) None of the above
E
Viruses, bacteria, and protists are uniquely characterized by
their respective size. True or false?
False
Quorum sensing in prokaryotes involves
(A) Cell–cell communication
(B) Production of molecules such as acetylated homoserine
lactone (AHL)
(C) An example of multicellular behavior
(D) Regulation of genes involved in diverse physiologic processes
(E) All of the above
E
A 16-year-old female patient presented to her family physician
with a complaint of an abnormal vaginal discharge and pruritus
(itching). The patient denied having sexual activity and recently
completed a course of doxycycline for the treatment of her acne.
An examination of a Gram-stained vaginal smear revealed the
presence of gram-positive oval cells about 4–8 μm in diameter.
Her vaginitis is caused by which of the following agents?
(A) Bacterium (B) Virus (C) Protozoa (D) Fungus (E) Prion
D
A 65-year-old man develops dementia, progressive over several
months, along with ataxia and somnolence. An electroencepha-
lographic pattern shows paroxysms with high voltages and slow
waves, suggestive of Creutzfeldt-Jakob disease (CJD). By which
of the following agents is this disease caused?
(A) Bacterium
(B) Virus
(C) Viroid
(D) Prion
(E) Plasmid
D
Twenty minutes after ingesting a raw clam, a 35-year-old man
experiences paresthesias of the mouth and extremities, head-
ache, and ataxia. These symptoms are the result of a neurotoxin
produced by algae called (A) Amoeba (B) Blue-green algae (C) Dinoflagellates (D) Kelp (E) None of the above
C
