Microbiology Exam 2 UTA; Questions and Answers % Correct
14 views 0 purchase
Course
Micro UTA
Institution
Micro UTA
Microbiology Exam 2 UTA; Questions and
Answers % Correct
Uniporters Correct answer-Transport in one direction across the membrane
Symporters Correct answer-Functions as co-transporters; the two molecules travel in the
same direction; 1. Energy is released as one substituent moves down its con...
Microbiology Exam 2 UTA; Questions and
Answers % Correct
Uniporters Correct answer-Transport in one direction across the membrane
Symporters Correct answer-Functions as co-transporters; the two molecules travel in the
same direction; 1. Energy is released as one substituent moves down its concentration gradient
2. This energy moves a second substrate against its gradient into the cell
Anitporters Correct answer-Transport a molecule across the membrane while
simultaneously transporting another molecule in the opposite direction; the actively
transported molecule moves in the direction opposite to the driving ion; 1. Antiporter binds
substrate A on the cytoplasmic side of the membrane 2.Antiporter opens to the outside, where
the concentration of A is less 3. Substrate A leaves its binding site, and substrate B then binds to
its site 4. Antiporter opens to the inside of the cell. Substrate B is released in exchange for
substrate A
The Phosphotransferase System in E.coli Correct answer--Type of group translocation
-Best studied system
-Moves glucose, fructose, and mannose
-Five proteins required
-Energy derived from phosphoenolpyruvate (PEP)
-The product Glucose 6-P is used in glycolysis
, Microbiology Exam 2 UTA; Questions and
Answers % Correct
Group Translocation Correct answer-Substance transported is chemically modified during
transport across the membrane, usually phosphorylated
ABC Systems Correct answer--ATP-Binding Cassette systems
- >200 different systems identified in prokaryotes
-Often involved in uptake of organic compounds (e.g. sugars, amino acids), inorganic nutrients
(e.g sulfate, phosphate), and trace metals
-Typically display high substrate specificity
-Contain periplasmic binding proteins
3 components: Periplasmic binding proteins, Membrane- spanning transporter, and ATP-
hydrolyzing protein (i.e ATPase); also requires ATP energy
Shown in diagram at C
Cell Wall Correct answer-How prokaryotes protect the cell membrane? For most species,
the cell envelope includes at least one structural supporting layer and the most common
structural support is _______?
This confers shape and rigidity to the cell and helps it withstand turgor pressure, can see it for
example in E.coli
, Microbiology Exam 2 UTA; Questions and
Answers % Correct
Mycoplasmas Correct answer-An example of a few prokaryotes who have a cell
membrane with no outer layers
It's difficult to Gram stain
Sacculus Correct answer-The bacterial cell wall, or this, consists of a single- interlinked
molecule; for example disaccharide or peptidoglycan
Needed to maintain high pressure and solubility in order to maintain its shape
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 GOLDTUTORS. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $16.99. You're not tied to anything after your purchase.
