NURS 3110 Exam 1 | University of Connecticut | Questions with 100% Verified
Answers | Latest Update
Question: Bacteria and viruses are both capable of growing within a
human host and causing disease. Which one of the following statements
most accurately describes the features of bacteria and viruses?
A. Bacteria have mitochondria allowing them to generate
energy, whereas viruses are reliant on the host cell for energy.
B. Because viruses lack a nucleolus, they can replicate
independently of their hosts, whereas bacteria rely on host proteins to
replicate their genomes.
C. Bacterial ribosomes are composed of the same RNA and
proteins as viral ribosomes.
D. Viruses can only replicate within a cell, whereas bacteria
can replicate independently of host cells.
Answer:
Viruses can only replicate within a cell, whereas bacteria can replicate independently of host
cells.
Question: Bacteria, fungi (yeasts and molds), viruses, and protozoa are
important causes of human diseases. Which one of the following
microbes contains either DNA or RNA but not both?
A. bacteria
B. molds
C. viruses
D. protozoa
E. yeasts
Answer:
viruses
Question: Which one of the following contains DNA that is not
surrounded by a nuclear membrane?
A. bacteria
B. molds
C. protozoa
D. yeasts
Answer:
bacteria
,Question: Mycobacterium tuberculosis stains well with the acid-fast
stain, but not with the Gram stain. Which one of the following is the
most likely reason for this observation?
A. It has a large number of pili that absorb the purple dye.
B. It has a large amount of lipid that prevents entry of the
purple dye.
C. It has a very thin cell wall that does not retain the purple
dye
D. It is too thin to be seen in the Gram stain.
E. It has histones that are highly negatively charged.
Answer:
It has a large amount of lipid that prevents entry of the purple dye.
Question: Bacteria that cause nosocomial (hospital-acquired) infections
often produce extracellular substances that allow them to stick firmly to
medical devices, such as intravenous catheters. Which one of the
following is the name of this extracellular substance?
A. axial filament
B. endotoxin
C. flagella
D. glycocalyx
E. porin
Answer:
glycocalyx
Question: Several bacteria that form spores are important human
pathogens. Which one of the following is the most accurate statement
about bacterial spores?
A. They are killed by boiling for 15 minutes.
B. They are produced primarily by gram-negative cocci.
C. They are formed primarily when the bacterium is exposed
to antibiotics.
D. They are produced by anaerobes only in the presence of
oxygen.
E. They are metabolically inactive, yet can survive for years in
that inactive state.
Answer:
They are metabolically inactive, yet can survive for years in that inactive state
, Question: Match the following bacteria to the correct description.
Bacteria: Staphylococcus, Clostridium, Neisseria, Mycobacterium,
Yersinia
Description: gram (-) cocci, acid fast, gram (+) spore forming anaerobic
rod, gram (-) zoonotic rod, gram (+) cocci
Answer:
1. staphylococcus= gram (+) cocci
2. clostridium= gram (+) spore forming anaerobic rod
3. Neisseria= gram (-) cocci
4. Mycobacterium= acid fast
5. Yersinia= gram (-) zoonotic rod
Question: Match the disease to the correct causative organism.
Disease: Syphilis, Lyme disease, Cholera, Gonorrhea, Tetanus
Causative Organism: Vibrio, Neisseria, Clostridium, Treponema,
Borrelia
Answer:
1. Syphilis= treponema
2. Lyme disease= Borrelia
3. Cholera= Vibrio
4. Gonorrhea= Neisseria
5. Tetanus= Clostridium
Question: Genome DNA sequencing is the current gold standard to
classify organisms. True or False
Answer:
True
Answers | Latest Update
Question: Bacteria and viruses are both capable of growing within a
human host and causing disease. Which one of the following statements
most accurately describes the features of bacteria and viruses?
A. Bacteria have mitochondria allowing them to generate
energy, whereas viruses are reliant on the host cell for energy.
B. Because viruses lack a nucleolus, they can replicate
independently of their hosts, whereas bacteria rely on host proteins to
replicate their genomes.
C. Bacterial ribosomes are composed of the same RNA and
proteins as viral ribosomes.
D. Viruses can only replicate within a cell, whereas bacteria
can replicate independently of host cells.
Answer:
Viruses can only replicate within a cell, whereas bacteria can replicate independently of host
cells.
Question: Bacteria, fungi (yeasts and molds), viruses, and protozoa are
important causes of human diseases. Which one of the following
microbes contains either DNA or RNA but not both?
A. bacteria
B. molds
C. viruses
D. protozoa
E. yeasts
Answer:
viruses
Question: Which one of the following contains DNA that is not
surrounded by a nuclear membrane?
A. bacteria
B. molds
C. protozoa
D. yeasts
Answer:
bacteria
,Question: Mycobacterium tuberculosis stains well with the acid-fast
stain, but not with the Gram stain. Which one of the following is the
most likely reason for this observation?
A. It has a large number of pili that absorb the purple dye.
B. It has a large amount of lipid that prevents entry of the
purple dye.
C. It has a very thin cell wall that does not retain the purple
dye
D. It is too thin to be seen in the Gram stain.
E. It has histones that are highly negatively charged.
Answer:
It has a large amount of lipid that prevents entry of the purple dye.
Question: Bacteria that cause nosocomial (hospital-acquired) infections
often produce extracellular substances that allow them to stick firmly to
medical devices, such as intravenous catheters. Which one of the
following is the name of this extracellular substance?
A. axial filament
B. endotoxin
C. flagella
D. glycocalyx
E. porin
Answer:
glycocalyx
Question: Several bacteria that form spores are important human
pathogens. Which one of the following is the most accurate statement
about bacterial spores?
A. They are killed by boiling for 15 minutes.
B. They are produced primarily by gram-negative cocci.
C. They are formed primarily when the bacterium is exposed
to antibiotics.
D. They are produced by anaerobes only in the presence of
oxygen.
E. They are metabolically inactive, yet can survive for years in
that inactive state.
Answer:
They are metabolically inactive, yet can survive for years in that inactive state
, Question: Match the following bacteria to the correct description.
Bacteria: Staphylococcus, Clostridium, Neisseria, Mycobacterium,
Yersinia
Description: gram (-) cocci, acid fast, gram (+) spore forming anaerobic
rod, gram (-) zoonotic rod, gram (+) cocci
Answer:
1. staphylococcus= gram (+) cocci
2. clostridium= gram (+) spore forming anaerobic rod
3. Neisseria= gram (-) cocci
4. Mycobacterium= acid fast
5. Yersinia= gram (-) zoonotic rod
Question: Match the disease to the correct causative organism.
Disease: Syphilis, Lyme disease, Cholera, Gonorrhea, Tetanus
Causative Organism: Vibrio, Neisseria, Clostridium, Treponema,
Borrelia
Answer:
1. Syphilis= treponema
2. Lyme disease= Borrelia
3. Cholera= Vibrio
4. Gonorrhea= Neisseria
5. Tetanus= Clostridium
Question: Genome DNA sequencing is the current gold standard to
classify organisms. True or False
Answer:
True
