Exam (elaborations)
BIOL 4100 Exam 4 Review
- Course
- BIOL 4100
- Institution
- Auburn University
BIOL 4100 Exam 4 Review
[Show more]
Content preview
BIOL 4100 Exam 4 ReviewActin binds Correct Answers ATP
Actin filaments
a. are polar
b. are non-polar
c. could be either polar or non polar Correct Answers a. are
polar
Antiparallel bundles... Correct Answers support molecular
motors
Consider formation of actin filaments.
Fn+G⟷Fn+1
For the plus end, the kon (i.e. association rate constant) = 10
µM-1s-1 and koff (i.e. dissociation rate constant) = 1 s-1.
Calculate KD of actin polymerization at the plus end of the
filament. Provide numerical answer in micromoles. Correct
Answers 0.1
Consider formation of actin filaments.
Fn+G⟷Fn+1
You have discovered a novel kind of actin. For the plus end and
T form:
kon (i.e. association rate constant) = 20 µM-1s-1
koff (i.e. dissociation rate constant) = 1 s-1.
For the minus end and D form
kon (i.e. association rate constant) = 5 µM-1s-1
koff (i.e. dissociation rate constant) = 0.5 s-1.
, Calculate treadmilling range for the novel actin. Provide
numerical answer in micromoles. Do not enter units into answer
boxes. Correct Answers lower boundary = 0.05
upper boundary = 0.1
Cytoskeletal component of filopodia is
a. parallel bundles
b. antiparallel bundles
c. microtubules
d. bundles of axonemal microtubules
e. stress bundles Correct Answers a. parallel bundles
Describe mechanism of chromosome mobility in Anaphase A
Correct Answers Kinesins depolymerize and shorten tubules
which causes chromosomes to move toward the spindle poles
along the kinetochore microtubules.
Describe mechanism of chromosome mobility is Anaphase B
Correct Answers The interpolar microtubules elongate and
push the spindle poles apart. The kinesins cross link with these
interpolar microbules and move towards the plus end causes
them to move in opposite directions.
Describe mechanochemical cycle of the myosin.
1. Name each stage of the cycle.
2. Describe what happens at each stage. Correct Answers 1.
Attached - the myosin is attached to the actin filament since
there is no nucleotide available
2. Released - ATP binds which causes a change in the
conformation of myosin which releases it from the actin
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 Classroom. 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.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
52928 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now