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Bio 250 straighterline test 1 prep questions with correct answers.
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Bio 250 straighterline test 1 prepquestions with correct answers
Organisms |called |parasites |are |______.
Select |one:
a. |always |harmful |to |their |host
b. |the |decomposers |in |ecosystems
c. |always |viruses
d. |free-living |- |correct |answer |-always |harmful |to |their |host
Trees |of |life |that |illustrate |the |phylogenetic |relationships |of |all |organisms |were |traditionally |based |on |
______; |newer |methods |for |determining |phylogeny |rely |on |______.
Select |one:
| a. |morphology; |nucleic |acid |sequences |
| b. |nucleic |acid |sequences; |morphology |
| c. |morphology; |virology |
| d. |morphology; |nutritional |requirements |
| e. |nucleic |acid |sequences; |microbiomes |- |correct |answer |-a. |morphology; |nucleic |acid |sequences
What |is |the |maximum |number |of |electrons |in |the |first |energy |shell |of |an |atom?
Select |one:
| a. |2 |
| b. |4 |
| c. |8 |
| d. |18 |
| e. |32 |- |correct |answer |-a. |2
Which |of |the |following |is |not |true |about |enzymes?
Select |one:
,| a. |Enzymes |are |found |in |all |cells. |
| b. |Enzymes |are |catalysts. |
| c. |Enzymes |participate |in |the |cell's |chemical |reactions. |
| d. |Enzymes |can |be |denaturated |by |heat |and |other |agents. |
|e. |Enzymes |have |high-energy |bonds |between |phosphates |- |correct |answer |-Enzymes |have |high-
energy |bonds |between |phosphates
NASA |has |published |a |list |of |criteria |for |identifying |fossil |bacteria |in |samples |from |Mars, |as |part |of |a |
search |for |evidence |of |life. |Which |of |the |following |is |good |evidence |for |the |presence |of |bacterial |
cells?
Select |one:
| a. |Cell |size |of |0.5 |to |2 |microns |
| b. |Three-dimensional |organization |of |cells |in |a |starburst |pattern |
| c. |Absence |of |carbon |in |the |material |
| d. |No |evidence |of |water |in |the |surrounding |mineral |- |correct |answer |-a. |Cell |size |of |0.5 |to |2 |microns
Which |type |of |medium |would |be |the |best |choice |when |shipping |a |sample |of |bacteria |from |a |clinic |to |
a |laboratory |for |testing?
Select |one:
| a. |Transport |medium |
| b. |Eosin-methylene |blue |agar |
| c. |Blood |agar |
| d. |Thioglycolate |medium |- |correct |answer |-a. |Transport |medium
The |orderly |arrangement |of |organisms |into |a |hierarchy |of |taxa |is |called |______.
Select |one:
| a. |classification |
| b. |identification |
| c. |nomenclature |
| d. |experimentation |
,| e. |biotechnology |- |correct |answer |-a. |classification
A |microbiologist |inoculates |Staphylococcus |aureus |into |a |culture |medium. |Following |incubation, |both |
Staphylococcus |aureus |and |Staphylococcus |epidermidis |are |determined |to |be |growing |in |this |culture. |
What |is |the |most |likely |explanation?
Select |one:
| a. |The |microbiologist |used |too |much |inoculum. |
| b. |The |culture |was |contaminated. |
| c. |The |incubation |temperature |was |incorrect. |
| d. |The |culture |medium |was |selective. |
| e. |The |culture |medium |was |differential. |- |correct |answer |-b. |The |culture |was |contaminated.
Disease-causing |microorganisms |are |called |______.
Select |one:
| a. |decomposers |
| b. |bacteria |
| c. |pathogens |
| d. |eukaryotes |
| e. |fermenters |- |correct |answer |-c. |pathogens
Which |scientific |field |is |involved |in |the |identification, |classification, |and |naming |of |organisms?
Select |one:
| a. |Nomenclature |
| b. |Taxonomy |
| c. |Phylogeny |
| d. |Pathology |
| e. |Epidemiology |- |correct |answer |-b. |Taxonomy
Covalent |bonds
, Select |one:
| a. |result |from |losing |electrons. |
| b. |are |always |polar. |
| c. |are |always |nonpolar. |
| d. |result |from |sharing |electrons. |
| e. |result |from |gaining |electrons. |- |correct |answer |-
Using |microbes |to |detoxify |a |site |contaminated |with |heavy |metals |is |an |example |of |______.
Select |one:
| a. |biotechnology |
| b. |bioremediation |
| c. |decomposition |
| d. |immunology |
| e. |epidemiology |- |correct |answer |-bioremediation
Which |of |the |following |statements |is |incorrect |regarding |protein |structure?
Select |one:
|a. |The |interaction |between |various |R |groups |of |amino |acids |determines |the |primary |structure |of |a |
protein. |
| b. |Beta-pleated |sheets |are |a |type |of |protein |secondary |structure. |
| c. |The |folding |of |a |protein |to |form |its |active |site |creates |its |tertiary |structure. |
|d. |Proteins, |such |as |antibodies |that |are |comprised |of |multiple |polypeptide |chains, |have |quaternary |
structure. |- |correct |answer |-a. |The |interaction |between |various |R |groups |of |amino |acids
A |scientist |who |studies |the |influence |of |microbes |in |the |formation |of |caves |is |called |a(n) |______.
Select |one:
| a. |geomicrobiologist |
| b. |astrobiologist |
| c. |epidemiologist |
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