Bio 2010 - Microbiology » Fall 2021 » Chapter 3 Quiz

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Question #1
While viewing the soil sample under the microscope you will notice a rod- shaped cell devoid of a nucleus. The only correct assumption that can be made of the cell thus far is that:
A.   it is part of a multicellular microorganisms
B.   it contains some peptidoglycan
C.   it contains mitochondria
D.   it is gram positive
E.   it is a eukaryote
Question #2
The reason that bacterial cells are more resistant to osmotic shock than are eukaryotic cells is that they:
A.   actively block water molecules from entering the cell
B.   are selectively permeable
C.   contain a cell wall composed of peptidoglycan
D.   contain a cell wall composed of cellulose
Question #3
Brushing teeth is important to biofilm prevention. What specific bacterial structure does brushing teeth address?
A.   endospores
B.   flagella
C.   fimbriae
D.   capsules
Question #4
Which of the following is NOT found in bacteria?
A.   cell wall
B.   plasma membrane
C.   ribosome
D.   membrane bound nucleus
Question #5
What is the purpose of bacterial endospores?
A.   help the bacterium to differentiate into faster growing stages of bacteria
B.   allow the bacterium to survive the absence of oxygen
C.   allow the bacterium to survive extended periods without nutrients
D.   allow the bacterium to make hundreds of "seeds" to spread on the wind
Question #6
Fimbriae:
A.   attach bacteria to various surfaces
B.   are pathways for the secretion of exoenzymes
C.   cause bacteria move through fluids
D.   sense changes in nutrient concentration
Question #7
The use of the antibiotics that inhibit or inactivate cellular ribosomes will result directly in the loss of which of the following functions:
A.   cell division
B.   ATP production
C.   DNA replication
D.   protein synthesis
E.   phagocytosis
Question #8
Plasmids are important to the genetics of many bacteria. This is because:
A.   they are inherited from one generation to the next
B.   they can render bacteria drug-resistant
C.   they may carry genes that give their host a selective advantage
D.   all of the above
Question #9
Which of the following is not true about capsules and slime layers?
A.   they can prevent desiccation of bacteria cells
B.   they are required for all bacteria to grow normally in culture
C.   they consist of secreted material lying outside of the bacterial cell wall
D.   they help bacteria resist phagocytosis by macrophages
Question #10
A bacillus bacterium with a single flagellum at each end is described as:
A.   amphitrichous
B.   peritrichous
C.   monotrichous
D.   lophotrichous

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