Bio 2010 - Microbiology » Spring 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 is part of a multicellular microorganisms
D.   it is gram positive
E.   it contains mitochondria
Question #2
Fimbriae:
A.   sense changes in nutrient concentration
B.   are pathways for the secretion of exoenzymes
C.   cause bacteria move through fluids
D.   attach bacteria to various surfaces
Question #3
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, they may carry genes that give their host a selective advantage, and they can render bacteria drug-resistant
C.   they are inherited from one generation to the next
D.   they may carry genes that give their host a selective advantage
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
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 are required for all bacteria to grow normally in culture
D.   they can prevent desiccation of bacteria cells
Question #6
Brushing teeth is important to biofilm prevention. What specific bacterial structure does brushing teeth address?
A.   endospores
B.   flagella
C.   fimbriae
D.   capsules
Question #7
What is the purpose of bacterial endospores?
A.   allow the bacterium to survive extended periods without nutrients
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.   help the bacterium to differentiate into faster growing stages of bacteria
Question #8
A bacillus bacterium with a single flagellum at each end is described as:
A.   monotrichous
B.   amphitrichous
C.   peritrichous
D.   lophotrichous
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
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.   cell division
C.   ATP production
D.   phagocytosis
E.   DNA replication

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