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 a eukaryote
B.   it contains some peptidoglycan
C.   it contains mitochondria
D.   it is gram positive
E.   it is part of a multicellular microorganisms
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.   contain a cell wall composed of cellulose
C.   contain a cell wall composed of peptidoglycan
D.   are selectively permeable
Question #3
Brushing teeth is important to biofilm prevention. What specific bacterial structure does brushing teeth address?
A.   fimbriae
B.   capsules
C.   flagella
D.   endospores
Question #4
Which of the following is NOT found in bacteria?
A.   plasma membrane
B.   cell wall
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 make hundreds of "seeds" to spread on the wind
C.   allow the bacterium to survive the absence of oxygen
D.   allow the bacterium to survive extended periods without nutrients
Question #6
Fimbriae:
A.   sense changes in nutrient concentration
B.   cause bacteria move through fluids
C.   are pathways for the secretion of exoenzymes
D.   attach bacteria to various surfaces
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.   protein synthesis
B.   phagocytosis
C.   ATP production
D.   DNA replication
E.   cell division
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 may carry genes that give their host a selective advantage
C.   they can render bacteria drug-resistant
D.   all of the above
Question #9
Which of the following is not true about capsules and slime layers?
A.   they consist of secreted material lying outside of the bacterial cell wall
B.   they help bacteria resist phagocytosis by macrophages
C.   they can prevent desiccation of bacteria cells
D.   they are required for all bacteria to grow normally in culture
Question #10
A bacillus bacterium with a single flagellum at each end is described as:
A.   peritrichous
B.   monotrichous
C.   lophotrichous
D.   amphitrichous

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