Exam (elaborations)
Bio 250 straighterline test 1 prep Exam Questions and Answers
- Course
- Institution
Bio 250 straighterline test 1 prep Exam Questions and Answers
[Show more]
Content preview
Bio 250 straighterline test 1 prep ExamQuestions and Answers
Organisms called parasites are ______.
Select one:
a. always harmful to their host
b. the decomposers in ecosystems
c. always viruses
d. free-living - -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 - -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 - -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 - -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 - -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 - -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 - -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. - -b. The culture was contaminated.
-Disease-causing microorganisms are called ______.
Select one:
a. decomposers
b. bacteria
c. pathogens
d. eukaryotes
e. fermenters - -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 - -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. - -
-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 - -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. - -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 - -a. geomicrobiologist
-The alpha (α) helix is a type of _____ protein structure.
Select one:
a. primary
b. secondary
c. tertiary
d. quaternary - -secondary
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Nursephil2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
81298 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now