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 gram positive
B.   it is part of a multicellular microorganisms
C.   it is a eukaryote
D.   it contains some peptidoglycan
E.   it contains mitochondria
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.   protein synthesis
B.   ATP production
C.   phagocytosis
D.   DNA replication
E.   cell division
Question #3
Brushing teeth is important to biofilm prevention. What specific bacterial structure does brushing teeth address?
A.   flagella
B.   fimbriae
C.   endospores
D.   capsules
Question #4
Which of the following is NOT found in bacteria?
A.   ribosome
B.   plasma membrane
C.   membrane bound nucleus
D.   cell wall
Question #5
A bacillus bacterium with a single flagellum at each end is described as:
A.   lophotrichous
B.   amphitrichous
C.   peritrichous
D.   monotrichous
Question #6
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 are required for all bacteria to grow normally in culture
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.   attach bacteria to various surfaces
B.   cause bacteria move through fluids
C.   are pathways for the secretion of exoenzymes
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.   contain a cell wall composed of peptidoglycan
B.   contain a cell wall composed of cellulose
C.   actively block water molecules from entering the cell
D.   are selectively permeable
Question #10
What is the purpose of bacterial endospores?
A.   allow the bacterium to survive extended periods without nutrients
B.   help the bacterium to differentiate into faster growing stages of bacteria
C.   allow the bacterium to make hundreds of "seeds" to spread on the wind
D.   allow the bacterium to survive the absence of oxygen

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