100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
MCB 2610 Chapter 7 Part 1 Question and answers 100% correct 2024/2025 $13.99
Add to cart
Quickly navigate to
Preview
  2.  
  3. MCB 2610
  4.  
  5. MCB 2610

Exam (elaborations)

MCB 2610 Chapter 7 Part 1 Question and answers 100% correct 2024/2025
 7 views  0 purchase
  • Course
  • MCB 2610
  • Institution
  • MCB 2610

MCB 2610 Chapter 7 Part 1 Question and answers 100% correct 2024/2025 MCB 2610 Chapter 7 Part 1 Halophiles grow optimally in _____ M a) more than 2 M b) less than 0.2 M c) more than 0.1 M d) Less than 0.1 M - correct answer B Extreme Halophiles grow optimally in _____ M a) more than 2...

[Show more]

Preview 4 out of 32  pages

Document information

  • October 16, 2024
  • 32
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

Written for

  • MCB 2610
  • MCB 2610

Seller

avatar-seller
Academia199

Reviews received

Content preview

MCB 2610 Chapter 7 Part 1
Halophiles grow optimally in _____ M
a) more than 2 M
b) less than 0.2 M
c) more than 0.1 M
d) Less than 0.1 M - correct answer ✔B


Extreme Halophiles grow optimally in _____ M
a) more than 2 M
b) less than 0.2 M
c) more than 0.1 M
d) Less than 0.1 M - correct answer ✔A


Which is true regarding Compatible solutes?
a) They can be built up to prevent swelling
b) They create a counter balance so water doesn't leave cell
c) both
d) neither - correct answer ✔C


What is the purpose of Compatible solutes? - correct answer ✔Prevent
excess water from killing the cell


Do we need water in cells for chemical rxns? - correct answer ✔Yes


Why don't microorganisms grow in distilled water? - correct answer
✔Because we add a solute so that the cells interact with the solute instead

,Pickling is used to preserve food. How does this work? - correct answer
✔The kurine (table salt) is added to cucumbers. The microorganisms will then
interact with the salt, not the food. The water also interacts with the solute
instead of food.


Water activity - correct answer ✔amount of moisture/water available to
organisms


The water activity (Aw) of distilled water is:
a) 1.0
b) 0.97
c) 0.5
d) 0.1 - correct answer ✔A


The water activity (Aw) of milk is:
a) 1.0
b) 0.97
c) 0.5
d) 0.1 - correct answer ✔B


The water activity (Aw) of dried fruit is:
a) 1.0
b) 0.97
c) 0.5
d) 0.1 - correct answer ✔C

,Osmotolerant microbes can grow in:
a) high water activity
b) low water activity
c) medium water activity
d) a wide range of water activity - correct answer ✔D


Is Staphylococcus aureus osmotolerant? - correct answer ✔Yes, it can grow
in extreme water conditions. Especially very low water content. It perfers 3 M
NaCl


True or false? Microbes have different optimal temperatures - correct answer
✔True


Most archaea are - correct answer ✔hyperthermophiles (like extreme cold
and heat)


True or false? Optimum growth temp shifts towards the:
a) minimum growth temp
b) maximum growth temp - correct answer ✔B


_____ perfer extreme cold temperatures such as that in Antartica
a) Psychrophiles
b) Psychrotrophs
c) Mesophiles
d) Thermophiles
e) Hyperthermophiles - correct answer ✔A

, _____ can grow at refridgeration temperature. An example of this is Lisreria
which can grow and replicate within your own refridgerator.
a) Psychrophiles
b) Psychrotrophs
c) Mesophiles
d) Thermophiles
e) Hyperthermophiles - correct answer ✔B


_____ can grow at human body temperature (about 37 degrees).
a) Psychrophiles
b) Psychrotrophs
c) Mesophiles
d) Thermophiles
e) Hyperthermophiles - correct answer ✔C


_____
a) Psychrophiles
b) Psychrotrophs
c) Mesophiles
d) Thermophiles
e) Hyperthermophiles - correct answer ✔


_____ prefer 0-20 degrees C
a) Psychrophiles
b) Psychrotrophs
c) Mesophiles

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 Academia199. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $13.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

56326 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$13.99
  • (0)
Add to cart
Added