Bio 2010 - Microbiology » Summer 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 is gram positive
C.   it is part of a multicellular microorganisms
D.   it contains mitochondria
E.   it contains some peptidoglycan
Question #2
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.   DNA replication
C.   protein synthesis
D.   ATP production
E.   phagocytosis
Question #3
Brushing teeth is important to biofilm prevention. What specific bacterial structure does brushing teeth address?
A.   capsules
B.   endospores
C.   flagella
D.   fimbriae
Question #4
Which of the following is NOT found in bacteria?
A.   membrane bound nucleus
B.   cell wall
C.   ribosome
D.   plasma membrane
Question #5
A bacillus bacterium with a single flagellum at each end is described as:
A.   lophotrichous
B.   peritrichous
C.   monotrichous
D.   amphitrichous
Question #6
Which of the following is not true about capsules and slime layers?
A.   they are required for all bacteria to grow normally in culture
B.   they consist of secreted material lying outside of the bacterial cell wall
C.   they help bacteria resist phagocytosis by macrophages
D.   they can prevent desiccation of bacteria cells
Question #7
Plasmids are important to the genetics of many bacteria. This is because:
A.   they can render bacteria drug-resistant
B.   they are inherited from one generation to the next
C.   they may carry genes that give their host a selective advantage
D.   they are inherited from one generation to the next, they may carry genes that give their host a selective advantage, and they can render bacteria drug-resistant
Question #8
Fimbriae:
A.   are pathways for the secretion of exoenzymes
B.   attach bacteria to various surfaces
C.   cause bacteria move through fluids
D.   sense changes in nutrient concentration
Question #9
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 #10
What is the purpose of bacterial endospores?
A.   allow the bacterium to survive the absence of oxygen
B.   help the bacterium to differentiate into faster growing stages of bacteria
C.   allow the bacterium to survive extended periods without nutrients
D.   allow the bacterium to make hundreds of "seeds" to spread on the wind

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