Exam (elaborations)
OSSF CYTOSKELETAL PROTEINS EXAM
- Course
- Institution
OSSF CYTOSKELETAL PROTEINS EXAM ...
[Show more]
Content preview
OSSF CYTOSKELETAL PROTEINSEXAM 2024-2025
What are the 3 primary types of protein filaments? - ANSWER Actin
microfilaments, intermediate filaments, microtubules
What is the thinnest, most flexible component of the cytoskeleton? -
ANSWER Actin filaments
What are actin filaments made of? - ANSWER Globular actin monomers
with their own ATP binding site
What end of an actin filament is growing? - ANSWER Plus end
What are hollow, nonbranching cylinders made of 13 parallel
protofilaments? - ANSWER Microtubules
What is at the minus end of microtubules? - ANSWER Alpha tubulin
What is at the plus end of microtubules? - ANSWER Beta tubulin
What are each beta tubulin of microtubules bound to? - ANSWER GTP
What end of microtubules is growing? - ANSWER Plus end
What is the anchoring site where actin filaments and microtubules grow
from? - ANSWER Nucleation site
Where is the nucleation site for acting molecules? - ANSWER Plasma
membrane
Where is the nucleation site for microtubules? - ANSWER Microtubule
organizing centers (MOC)
, The binding of subunits causes hydrolysis of ATP (actin) or GTP
(microtubules) and decreases the strength of binding causing... -
ANSWER Dynamic instability
Which end do the ATP/ GTP molecules dissociate from? - ANSWER
Minus end
What provides a stronger, stable actin structure? - ANSWER Bundling
proteins together
What regulates shape and number of actin filaments and microtubules
through altering the number of regulatory proteins? - ANSWER Nucleus
What acts as a scaffold for myosin (motor protein) in muscle cells and
helps with vesicle movements? - ANSWER Actin filaments
What are apical cell membrane projections that increase SA? -
ANSWER Microvilli
What are microvilli supported by? - ANSWER Actin bundles- in the core
and anchored to terminal web of actin at the base
What produces cellular contraction (and cellular movement) by sliding
actin filaments in opposite directions and hydrolyzing ATP in the
process? - ANSWER Myosin
What are the 4 main functions of microtubules in the cell? - ANSWER
Mitotic spindle, cilia and flagella, anchor organelles, motor proteins
(dynein and kinesin) move vesicles along
What are the sites that localize microtubule minus ends? - ANSWER
Microtubule organizing centers (MTOC)
What is used by all cells for generating the mitotic spindle during mitosis
and meiosis? - ANSWER Centrosome
What serve as poles for the mitotic spindle during mitosis? - ANSWER
Duplicated centrosomes
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 luzlinkuz. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $11.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67474 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now