microbiology assignment 1
With respect to cell structure, how are viruses characterized?
A. Noncellular
B. Eukaryotic
C. Unicellular
D. Prokaryotic - Ans>>A- noncellular
(Viruses are considered noncellular microbes because they do not contain cells or cellular structures
like organelles. Therefore, viruses are not categorized as prokaryotic or eukaryotic.)
Which of the following is an INCORRECT pairing?
Choose one:
A. Protozoa: multicellular
B. Viruses: noncellular
C. Prokaryotes: unicellular
D. Archaea: unicellular - Ans>>A. Protozoa: multicellular
(Protozoans are a group of diverse and distantly related microorganisms. They are eukaryotic,
heterotrophic, unicellular (single-celled) microorganisms. Eukaryotic organisms have a "true defined
nucleus" meaning that the genetic material is enclosed in a membranous structure known as the
nucleus. Unicellular organisms only consist of one cell, which is a stark contrast to multicellular
organisms that consist of more than one cell type. Viruses are noncellular.)
By definition, which of the following microbe types always causes disease?
Choose one:
A. A virus
B. A protozoan
C. A pathogen
D. A bacterium - Ans>>C. a pathogen
(Most microorganisms do not cause disease, but there are some microorganisms that have the ability
to cause disease. Microorganisms that always cause disease are referred to as pathogens. Pathogens
can be viruses, bacteria, algae, protozoa, or fungi. Any organism can be infected with a pathogen.)
Which of the following microbes reproduce in cells but are noncellular and can contain RNA as their
genetic material?
Choose one:
A. Fungi
B. Viruses
C. Archaea
D. Bacteria - Ans>>B. Viruses
(Viruses are noncellular or acellular, meaning they do not contain cells or cellular structures. Viruses
are composed of protein and a nucleic acid. One of the nucleic acids that can be contained in the
capsid of a virus is RNA.)
Which of the following microorganisms lack organelles?
Choose one:
A. Protozoa
B. Algae
C. Bacteria
D. Fungi - Ans>>C. Bacteria
Bacteria are prokaryotic. Prokaryotic cells do not have nuclei or any membrane-bound structures.
With respect to cell structure, how are viruses characterized?
A. Noncellular
B. Eukaryotic
C. Unicellular
D. Prokaryotic - Ans>>A- noncellular
(Viruses are considered noncellular microbes because they do not contain cells or cellular structures
like organelles. Therefore, viruses are not categorized as prokaryotic or eukaryotic.)
Which of the following is an INCORRECT pairing?
Choose one:
A. Protozoa: multicellular
B. Viruses: noncellular
C. Prokaryotes: unicellular
D. Archaea: unicellular - Ans>>A. Protozoa: multicellular
(Protozoans are a group of diverse and distantly related microorganisms. They are eukaryotic,
heterotrophic, unicellular (single-celled) microorganisms. Eukaryotic organisms have a "true defined
nucleus" meaning that the genetic material is enclosed in a membranous structure known as the
nucleus. Unicellular organisms only consist of one cell, which is a stark contrast to multicellular
organisms that consist of more than one cell type. Viruses are noncellular.)
By definition, which of the following microbe types always causes disease?
Choose one:
A. A virus
B. A protozoan
C. A pathogen
D. A bacterium - Ans>>C. a pathogen
(Most microorganisms do not cause disease, but there are some microorganisms that have the ability
to cause disease. Microorganisms that always cause disease are referred to as pathogens. Pathogens
can be viruses, bacteria, algae, protozoa, or fungi. Any organism can be infected with a pathogen.)
Which of the following microbes reproduce in cells but are noncellular and can contain RNA as their
genetic material?
Choose one:
A. Fungi
B. Viruses
C. Archaea
D. Bacteria - Ans>>B. Viruses
(Viruses are noncellular or acellular, meaning they do not contain cells or cellular structures. Viruses
are composed of protein and a nucleic acid. One of the nucleic acids that can be contained in the
capsid of a virus is RNA.)
Which of the following microorganisms lack organelles?
Choose one:
A. Protozoa
B. Algae
C. Bacteria
D. Fungi - Ans>>C. Bacteria
Bacteria are prokaryotic. Prokaryotic cells do not have nuclei or any membrane-bound structures.
