BIO 250 STRAIGHTERLINE TEST 1 PREP LATEST UPDATED 2024 WITH 100% CORRECT QUESTIONS AND ANSWERS
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BIO 250 STRAIGHTERLINE 1 PREP
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BIO 250 STRAIGHTERLINE 1 PREP
BIO 250 STRAIGHTERLINE TEST 1 PREP LATEST UPDATED 2024 WITH 100% CORRECT QUESTIONS AND ANSWERS
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. Enzyme...
BIO 250 STRAIGHTERLINE TEST 1 PREP LATEST UPDATED 2024
WITH 100% CORRECT QUESTIONS AND ANSWERS
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 - 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 - 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 - 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 - 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. - ANSWER-b. The culture was contaminated.
Disease-causing microorganisms are called ______.
Select one:
a. decomposers
b. bacteria
c. pathogens
d. eukaryotes
e. fermenters - ANSWER-c. pathogens
Organisms called parasites are ______.
Select one:
a. always harmful to their host
b. the decomposers in ecosystems
c. always viruses
d. free-living - 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 - 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 - ANSWER-a. 2
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 - 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. - 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 - 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. - 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
d. immunologist - ANSWER-a. geomicrobiologist
The alpha (α) helix is a type of _____ protein structure.
Select one:
a. primary
b. secondary
c. tertiary
d. quaternary - ANSWER-secondary
A nutrient medium that contains at least one ingredient that is not chemically defined is
termed ______.
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