BI234 EXAM 2 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
2 views 0 purchase
Course
BI 234
Institution
BI 234
BI234 EXAM 2 QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED
What do all organisms need to grow?
Their chemical and physical requirements met
What are some chemical requirements?
Source of
-Carbon
-Oxygen
-Nitrogen
-Phosphorus
Describe the chemical requirement of oxygen
Using mo...
bi234 exam 2 questions and answers with complete s
Written for
BI 234
All documents for this subject (66)
Seller
Follow
NurseAdvocate
Reviews received
Content preview
BI234 EXAM 2 QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED
What do all organisms need to grow?
Their chemical and physical requirements met
What are some chemical requirements?
Source of
-Carbon
-Oxygen
-Nitrogen
-Phosphorus
Describe the chemical requirement of oxygen
Using molecular oxygen comes at a cost... free radical
- An organism must have a specific enzyme to neutralize free radicals, there for they
must have genes to code for the enzymes
- Most Eukarya are obligate aerobes
** Aerobic organisms can handle free radicals and anaerobic organisms cannot
Where do organisms grow with different levels of oxygen?
What are some physical requirements?
, Certain range of
-Temperature
-pH
-Moisture
How is the cell membrane affected by temperature?
Too cold: becomes rigid and fragile
Too hot: becomes too fluid (melts)
What is the pH scale based on?
The concentration of H+
0= Most acidic
7= Neutral
14= Most basic
What is an endospore?
a dormant, tough, and temporarily non-reproductive structure produced by certain
bacteria.
** Very hard to get rid of
What is generation time?
Time it takes for microorganism to double its population
Describe the different phases of cell growth
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 NurseAdvocate. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
