Exam (elaborations)
MICR 271 Midterm questions with correct answers.pdf
- Course
- Institution
MICR 271 Midterm questions with correct
[Show more]
Content preview
MICR 271 Midterm questions withcorrect answers
3 Domains -correct answer 1)Archaea
2)Bacteria
3)Eukaryota
Endosymbiont Theory Definition - correct answer Eukaryotes evolved from prokaryotes
based on similarities found between bacteria and mitochondria
Microbe Definition - correct answer microscopic living organism that may be single
celled (prokaryotic) or multicellular (eukaryotic)
_____________ is abundant in the atmosphere but only a few species of microbes can
use it in this form - correct answer Nitrogen
The total biomass on Earth of bacteria is approaching that of ________ correct answer -
plants
,There are typically ____________ bacteria in a gram of soil and __________________
bacteria in a mL of fresh water - correct answer 50 million; 1 million
A human consists of __________ more bacteria cells than human cells and
____________ more microbial genes than human genes - correct answer 10x; 100x
Photosynthetic bacteria (cyanobacteria) produce _____________________ correct
answer - 50% of the oxygen we breathe
STUDY CHART W DIFFERENCES BW EUKARYOTES & PROKARYOTES -
Major difference in structure of eukaryotes vs prokaryotes - correct answer Eukaryotes
have membrane bound organelles and prokaryotes do not
Explain the endosymbiotic theory - correct answer 1)Eukaryotes evolved from
prokaryotes based on similarities bw bacteria and mitochondria
2)Mitochondria & chloroplasts evolved from free-living bacteria via symbiosis within a
eukaryotic host cell
, 3)2 key diffs bw bacteria & miochondria= these organelles contain their own DNA &
distinct translation system
What are the 2 theories of mitochondrial symbiosis/endosymbiont hypothesis - correct
answer 1)Archezoan Scenario
2)Symbiogenesis Scenario
Define symbiosis - Living together or close association of 2 dissimilar organisms, each
of these organisms being known as a symbiont
Archezoan Scenario - -one of the theories of mitochondrial symbiosis
-A primitive mitochondrial eukaryote cell phagocytosed an a-proteobacterium which led
to evolution of mitochondrion
-fallen out of favour
Symbiogenesis Scenario - -theory of endosymbiont theory/mitochondrial symbiosis
1)States complexity of eukaryotic cell and its defining features emerged after
mitochondrial symbiosis, not before
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 QUALITYGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now