Biol 2051 Exam 1 ACTUAL Questions and CORRECT Answers
0 view 0 purchase
Course
Biol 2051
Institution
Biol 2051
Biol 2051 Exam 1 ACTUAL Questions and
CORRECT Answers
An important assumption of molecular sequence comparisons to generate phylogenies is
_____ - CORRECT ANSWER- species that share a more recent common ancestor will
have fewer differences than species that have been separated for longer per...
Biol 2051 Exam 1 ACTUAL Questions and
CORRECT Answers
An important assumption of molecular sequence comparisons to generate phylogenies is
_____ - CORRECT ANSWER✔✔- species that share a more recent common ancestor will
have fewer differences than species that have been separated for longer periods of time
The cell wall is constructed _____ in all three domains - CORRECT ANSWER✔✔-
differently
If there are 5 nucleotide differences between species A and B, 12 between species A and C,
and 14 between species B and C, one can conclude _______ - CORRECT ANSWER✔✔-
species A and B shared a common ancestor after they shared a common ancestor with C
Which came first: DNA, RNA, proteins, lipids? - CORRECT ANSWER✔✔- RNA
What is the most likely sequence of events that took place to generate the first cells? -
CORRECT ANSWER✔✔- Form RNA; Form catalytic molecules; Assemble membranes
Bacteria are able to occupy more habitats than eukaryal cells because they - CORRECT
ANSWER✔✔- have greater metabolic diversity
Anoxygenic photosynthesis differs from oxygenic photosynthesis in that - CORRECT
ANSWER✔✔- anoxygenic photosynthesis does not produce oxygen, while oxygenic
photosynthesis does
What are Koch's postulates? - CORRECT ANSWER✔✔- -The microbe must be isolated and
cultured in the lab.
-The microbe must be found in all organisms with the disease, and absent in all organisms
without the disease.
-When inoculated into a susceptible host, the microbe must cause the disease.
Pasteur's famous experiment with swan-necked flasks showed - CORRECT ANSWER✔✔-
broiling broth media killed whatever microorganisms may have been present; whatever was
, responsible for causing broths to turn turbid came from the air (bacteria do not spontaneously
generate)
An important finding from Edward Jenner's vaccination experiment is - CORRECT
ANSWER✔✔- immunity to one microorganism can be conferred by exposure to a closely
related microorganism.
The key features of living organisms include - CORRECT ANSWER✔✔- -metabolism and
growth
-reproduction and genetic variation
-ability to respond to external stimuli
-homeostasis
Macromolecule types found in all cells - CORRECT ANSWER✔✔- polysaccharides,
proteins, lipids, and nucleic acids
Repeating subunits of proteins are called - CORRECT ANSWER✔✔- amino acids
Polysaccharides are composed of repeating units called - CORRECT ANSWER✔✔-
monosaccharides
Lipids are composed of - CORRECT ANSWER✔✔- a hydrocarbon chain linked to a
glycerol molecule.
The domains of living organisms include - CORRECT ANSWER✔✔- -eukarya - cells that
have a membrane-bound nucleus
-archaea - simple, single celled organisms that manufacture mRNA and proteins in a manner
similar to eukaryotes
-bacteria - simple single celled organisms that synthesize mRNA and proteins
Why are microbes useful models in research? - CORRECT ANSWER✔✔- Many microbes
can grow rapidly on inexpensive media and be genetically manipulated easily; can be
cultivated in lab; have metabolic and regulatory pathways that are very similar to those found
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 MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.99. You're not tied to anything after your purchase.
